Shilajit vs Ashwagandha: Which Should You Take?

In short: Shilajit and Ashwagandha are not opposite personality types. Ashwagandha currently has the broader human evidence base, particularly for psychological stress, sleep and increasingly physical performance. Shilajit has a smaller but genuine evidence base around specific outcomes including fatigue-related muscular performance, testosterone and bone health. Neither is universally better. The right question is which has evidence most relevant to your goal — and whether it is appropriate for you.

Important: Gold+ is a UK food supplement, not a medicine. Both Shilajit and Ashwagandha have suitability considerations. If you take prescription medication, have a thyroid or autoimmune condition, significant kidney or liver disease, or are pregnant or breastfeeding, speak to a pharmacist or GP before use. Suitability comes before the comparison.

The Right Way to Frame This Comparison

Shilajit is often described as the "energy" option and Ashwagandha as the "calming" option. That can be a useful first orientation, but it is not a clinically established division. Ashwagandha has direct human evidence for stress and sleep, but it has also been studied for strength, endurance and exercise recovery. Shilajit has human research relevant to fatigue-related muscular performance and other physiological outcomes, while its direct evidence for psychological stress is much less developed.

Both also sit within the broader Ayurvedic Rasayana tradition — a framework concerned with resilience, nourishment, strength, recovery, appropriate measure and individual suitability. Rasayana does not require us to turn one herb into "energy" and the other into "calm." Think of them as overlapping Rasayana substances with different evidence emphases, not opposite personality types.

Use "vitality versus calm" as a starting clue, not as the conclusion. Shilajit and Ashwagandha have different evidence emphases, not mutually exclusive effects.

Evidence Volume: Why More Studies Is Not the Whole Story

Ashwagandha has been studied in considerably more human clinical trials than Shilajit, particularly for stress, sleep and increasingly physical performance. That matters: a larger, replicated evidence base generally gives us more confidence when multiple studies address the same question. But it does not automatically make Ashwagandha the better supplement for every person or every goal.

Shilajit's human evidence base is smaller — not nonexistent. Controlled trials have examined outcomes including testosterone in healthy middle-aged men, fatigue-related muscular performance and bone health in postmenopausal women with osteopenia. Those findings should be judged on their own design and relevance rather than discounted simply because Ashwagandha has been studied more often overall.

Outcome area	Ashwagandha evidence	Shilajit evidence
Psychological stress / cortisol	Multiple RCTs; clearer direct human evidence	HPA-axis research largely preclinical; oxidative-stress biomarkers studied in humans but not equivalent to psychological stress
Sleep	Direct human RCTs measuring sleep parameters	No comparable direct human sleep evidence
Resistance-training strength gains	Multiple RCTs alongside structured training; broader direct evidence	Keller studied fatigue-related strength retention, not training-related strength gains
Fatigue-related strength retention	Not the primary focus of Ashwagandha performance trials	Keller 2019: specific controlled human signal at 500 mg/day
Testosterone	Secondary outcome in resistance-training RCT (Wankhede)	Dedicated 90-day RCT in healthy men aged 45–55 (Pandit)
Bone health	Not a primary Ashwagandha evidence area	48-week RCT in postmenopausal women with osteopenia (Pingali)

The comparison should ask "what has been studied for this outcome?" rather than "which ingredient has won the most trials?" More studies increase the amount of evidence. They do not automatically increase the relevance of that evidence to the question you are asking.

Stress and Sleep: Where Ashwagandha Has the Clearer Evidence

For psychological stress and sleep, Ashwagandha currently has substantially more direct human evidence than Shilajit. That makes it the more evidence-relevant of the two for those particular goals.

Psychological stress: Chandrasekhar et al. enrolled 64 adults with chronic stress and randomised them to placebo or 300 mg Ashwagandha root extract twice daily for 60 days. The Ashwagandha group showed greater reductions in several stress-assessment scores and serum cortisol. [1] Lopresti et al. found statistically significant improvements in HAM-A scores and morning cortisol with 240 mg/day of a standardised extract over 60 days in stressed healthy adults, though the DASS-21 difference was only near-significant and the authors called for larger studies. [2]

Sleep: Langade et al. conducted a 10-week randomised controlled study in people with insomnia and anxiety and reported improvements in sleep-onset latency, sleep efficiency and subjective sleep quality with 300 mg twice daily. [3] A further eight-week randomised study in 80 participants — healthy adults and people with insomnia — reported improvements in several sleep parameters, with effects appearing more pronounced in the insomnia group; the authors again stated that additional trials were needed. [4]

That is meaningful evidence. But it is not the same as establishing Ashwagandha as a treatment for anxiety disorders or insomnia. The trials are relatively modest, use particular extracts and doses, and several authors explicitly call for larger studies. Ashwagandha's sleep evidence also comes from regular supplementation over weeks — not from demonstrating an immediate bedtime sedative effect.

What about Shilajit and stress? Three types of "stress" appear in the literature and should not be conflated:

• Psychological stress — perceived stress, anxiety scales, cortisol. Ashwagandha has direct controlled human evidence here. Shilajit does not.
• Oxidative stress — biochemical markers such as MDA and glutathione. Shilajit's 48-week human RCT in postmenopausal women measured these alongside bone outcomes. [5] This is not evidence for psychological stress relief.
• Physical fatigue — Keller 2019 investigated strength retention after a fatiguing exercise protocol. This is not anxiety, work stress or poor sleep.

Oxidative stress, psychological stress and physical fatigue share a word or a feeling in everyday language, but they are not interchangeable clinical outcomes. Ashwagandha has the clearer psychological-stress and sleep evidence; Shilajit has a different fatigue and physiological-resilience story.

If stress or sleep is your primary concern and it is persistent or severe, neither supplement is a substitute for appropriate clinical assessment.

Physical Performance: Both Have Evidence, for Different Questions

Physical performance is one area where the simple "Shilajit for energy, Ashwagandha for calm" comparison breaks down most clearly. Both now have controlled human evidence — but the studies ask different questions.

What Keller 2019 actually shows for Shilajit

Keller et al. randomised 63 recreationally active men to 250 mg/day Shilajit, 500 mg/day or placebo for eight weeks. The study did not include a structured resistance-training programme. After supplementation, participants underwent a laboratory fatiguing leg-extension protocol. [6]

The clearest finding: at 500 mg/day, participants showed better retention of maximal isometric strength following the fatiguing protocol, with the most significant result in the subgroup of participants in the upper half for baseline strength. The study reported no effect on pre-fatigue maximal voluntary isometric contraction or pre-fatigue concentric peak torque.

This supports: "Eight weeks of 500 mg/day Shilajit was associated with better retention of muscular strength after a fatiguing exercise protocol." It does not support: "Shilajit increases strength" or "Shilajit builds muscle."

What Wankhede and Verma show for Ashwagandha

Wankhede et al. studied 57 young men with little resistance-training experience, randomising them to 600 mg/day Ashwagandha root extract or placebo while both groups completed an eight-week resistance-training programme. The Ashwagandha group had greater increases in bench-press and leg-extension 1RM, alongside differences in muscle-size measurements and serum testosterone as a secondary outcome. [7]

Verma et al. studied 80 physically active men and women (73 completing) in an eight-week randomised, double-blind, placebo-controlled trial with 600 mg/day alongside resistance training. Compared with placebo, the Ashwagandha group showed greater improvements in upper- and lower-body strength, muscle-girth measures and VO₂max/cardiorespiratory endurance. [8]

These studies ask a different question from Keller: can supplementation alongside structured resistance training augment strength gains and training adaptations? The answer from both trials is yes, with Ashwagandha showing an advantage over placebo.

Strength gained during training and strength retained after fatigue are not the same endpoint. Ashwagandha currently has broader direct evidence for training-related strength and endurance. Shilajit has a narrower but genuine human signal around resistance to fatigue. Neither "wins" physical performance as a category.

Ashwagandha's stress evidence should not obscure its genuine physical-performance research. And Shilajit's Keller result deserves to be taken seriously without being expanded into a claim that Shilajit broadly increases strength, muscle growth or recovery speed.

Testosterone: Two Different Kinds of Evidence

Both Shilajit and Ashwagandha have human studies involving testosterone, but they should not be compared as if they were tested head-to-head. The trials used different populations, preparations, doses, durations and study contexts. You cannot rank two ingredients by comparing percentage changes from unrelated clinical trials.

Shilajit — Pandit 2016: A randomised, double-blind, placebo-controlled trial specifically investigating the effect of purified Shilajit on androgenic hormones. Healthy men aged 45–55 received 250 mg twice daily for 90 days. Compared with placebo, Shilajit was associated with statistically significant increases in total testosterone, free testosterone and DHEAS, while LH and FSH were maintained. [9] This is unusually direct: testosterone was the study question, not a secondary outcome.

Ashwagandha — Wankhede 2015: Testosterone was one of several secondary outcomes within an eight-week resistance-training RCT. The Ashwagandha group had a significantly greater increase in serum testosterone than placebo alongside greater strength gains. [7] This is meaningful, but the physiological context differs: exercise and training interact with endocrine physiology, so this is not a direct equivalent of Pandit.

Both findings are worth including. Neither establishes either herb as a treatment for clinically low testosterone. A testosterone change is an outcome — not automatically the mechanism behind every other benefit. The causal chain (testosterone change → strength/libido/energy) is not established by either trial.

Both have a testosterone signal; neither has earned the title of proven testosterone treatment. Modern research gives us testosterone as one measurable endpoint; Rasayana reminds us that vitality was never meant to be reduced to a single hormone.

If testosterone is your concern because of symptoms or a suspected deficiency, a supplement comparison is not a substitute for appropriate clinical assessment.

Safety and Suitability: Different Profiles, Not a Simple Winner

Both can be appropriate for many healthy adults, but their safety questions are not identical. Declaring one "safer" would be misleading — fewer documented interactions can simply reflect less interaction research.

Ashwagandha suitability considerations

Ashwagandha's larger evidence base means we know more about both its potential benefits and its cautions. Current NCCIH guidance notes that short-term use appears reasonably tolerated in many people, but identifies several situations requiring caution or avoidance: [10]

• Pregnancy and breastfeeding: not recommended
• Thyroid conditions or thyroid medication: specific professional review required before use
• Autoimmune conditions or immunosuppressive treatment: check first with a clinician
• Sedatives, anticonvulsants, blood-pressure, diabetes and thyroid medicines: potential interactions mean medication use should trigger pharmacist or clinician review
• Liver injury: rare cases have been reported; unexplained jaundice, dark urine or significant illness after starting should not be ignored
• Surgery: NCCIH advises stopping before planned surgery

Most clinical studies do not show a common liver-toxicity problem with standardised Ashwagandha, and a 2026 prospective safety study in 145 healthy adults at 2,000 mg/day for 12 weeks reported no serious safety signal. [11] But rare idiosyncratic reactions cannot be ruled out by a single non-comparative study.

Shilajit suitability considerations

Shilajit's human safety evidence is smaller. Human studies of purified Shilajit have generally been reassuring at the doses and durations tested — Biswas et al. reported unchanged hepatic and renal profiles after 200 mg/day for 90 days, and Das et al. reported good tolerability at 500 mg/day over 12 weeks. [12,13] But those observations do not establish complete long-term safety, safety in pregnancy, safety in significant kidney or liver disease, or compatibility with every medicine.

Fewer documented interactions do not prove the absence of interactions. Current NHS SPS guidance recommends individual assessment based on the person's conditions, medicines, treatment importance and the specific product rather than relying on generic herbal-interaction lists. [14]

For Shilajit, product quality is also part of safety in a way that cannot be separated from the substance itself. Modern analytical work shows that Shilajit is compositionally variable between geographical samples, and a 2025 study specifically detected thallium in both natural Shilajit and commercial supplements. [15,16] These papers make the case for rigorous testing — not against Shilajit as a category.

Neither Ashwagandha nor Shilajit should be treated as a routine pregnancy or breastfeeding supplement.

The Gold+ formulation point

Gold+ contains both Shilajit and Ashwagandha. If you have a reason to avoid Ashwagandha — particularly a thyroid condition, autoimmune condition or relevant medication — a Shilajit product that contains Ashwagandha is not an Ashwagandha-free alternative. A combination inherits the suitability questions of its ingredients.

For detailed guidance: Shilajit Side Effects & Safety | Does Shilajit Interact With Medications?

Can You Take Both?

Shilajit and Ashwagandha can be formulated together — Gold+ itself contains both. But "can be combined" is not the same as "clinically proven to work better together." We do not currently have human trials showing that Shilajit plus Ashwagandha produces additive or synergistic benefits compared with either ingredient alone.

Ayurvedic tradition provides a legitimate formulation context for combining Shilajit with companion botanicals, including concepts such as yogavahi. That should be presented as traditional formulation knowledge — not as proof of a modern pharmacokinetic or clinical synergy that has not yet been demonstrated in humans.

Gold+ should therefore be understood as an intentional Ayurvedic formulation, not as a workaround for gaps in the individual evidence bases. The separate research on Shilajit and Ashwagandha helps explain why each ingredient is interesting; it does not become clinical proof for the finished combination.

If you already use Gold+, you are already taking Ashwagandha with Shilajit. We would not recommend automatically adding separate versions of either simply to chase a stronger or faster effect. And if you are considering Gold+ because you cannot decide between the two ingredients, that is not the right reason to choose a combined formula.

Can be combined does not mean needs to be combined. Rasayana is about appropriate combination and appropriate measure — not building the biggest possible stack.

Quality: What to Actually Look For

For either herb, quality should be demonstrated through identity, preparation, composition, dose and testing — not inferred from price, packaging or a single impressive percentage.

For Shilajit

Ask: Where was it sourced? How was the raw material purified? What is actually present in the finished product? Has it been screened for relevant contaminants? Can you see the analytical results rather than just a "lab tested" badge?

Himalayan provenance is meaningful to the sourcing and Ayurvedic story — but origin is not a laboratory result. Purification matters: raw Shilajit is not more "authentic" because it is less processed. Appropriate preparation is part of the Rasayana tradition. Ancient does not mean raw.

Fulvic acid is a useful measurable compositional marker. It should not become the entire definition of quality or effectiveness. We publish our Eurofins results — 79.22% fulvic acid in Gold+ Capsules and 76.74% in Gold+ Resin — because measurable composition matters. Not because a particular percentage has been clinically established as the point where Shilajit becomes effective.

For Ashwagandha

Ask: Is it actually Withania somnifera? Is it root, root extract, root-and-leaf extract or something else? How many milligrams are in the serving? Is the extract standardised, and to what? Has the finished product been tested for identity and contaminants?

Root versus leaf is part of the product, not a footnote. The chemical profiles differ, and botanical-authentication research has specifically highlighted undeclared substitution of Ashwagandha root extracts with aerial parts. DNA-barcoding studies have also found authentication problems among commercial samples. [17,18]

Withanolide percentage is a useful characterisation marker — not a simple potency ladder. A higher percentage does not automatically mean better efficacy, better safety or closer equivalence to the extract used in the study you are citing.

For either herb

The closer a brand wants to stand to clinical research, the more precisely it should identify the preparation it actually sells. Do not just ask whether the ingredient has research. Ask how closely the product in your hand resembles the material used in the research being cited.

Lab testing should reduce uncertainty about the product. It should not be used to manufacture certainty about the person taking it. Analytical testing can tell us what is in a product and what was not detected above relevant limits. It cannot tell us whether that product will work for you or whether it is medically appropriate for you.

Which One Should You Take?

Start with the outcome you actually care about — not the ingredient. Before choosing between two supplements, be able to finish this sentence: "The main thing I am hoping to improve is…" If you cannot, the comparison has not yet given you a reason to choose either.

If your main concern is…	Evidence-weighted starting point	Important caveat
Psychological stress	Ashwagandha has clearer direct human evidence	Not a proven treatment for anxiety disorders; persistent symptoms need clinical assessment
Sleep	Ashwagandha has clearer direct human evidence	Not an acute sedative; evidence is from sustained supplementation over weeks
Resistance-training strength / endurance	Ashwagandha currently has broader direct trial evidence	Trials used specific extracts alongside structured training; not all preparations are equivalent
Fatigue-related strength retention	Shilajit has a specific controlled human signal (Keller 2019)	Eight-week supplementation study; not a pre-workout protocol or general strength claim
Testosterone	Both have relevant human evidence; Shilajit has a particularly direct RCT (Pandit 2016)	Neither is a treatment for testosterone deficiency; symptoms need clinical assessment
Rasayana / traditional interest	Both belong to the wider tradition; choose based on the specific profile that interests you	Traditional context does not establish clinical superiority of either
No clear goal	Neither — for now	A supplement does not become necessary simply because two popular options are difficult to choose between

Having two goals does not automatically create a two-supplement requirement. Ashwagandha itself has evidence spanning both psychological stress and physical performance. Shilajit has a broader Rasayana and physiological research story than just "energy." If you want to experiment, changing one thing at a time makes it easier to interpret your experience.

If you are considering Gold+ because you cannot decide between the two ingredients, that is not the right reason to choose a combined formula. A combined formula prioritises convenience and formulation philosophy over your ability to isolate the contribution of one ingredient. Choose it because you understand and want the complete formulation — not as a hedge against uncertainty.

"Neither for now" is a perfectly sensible outcome. The purpose of this comparison is to help you make a better decision — not to make sure that decision ends with a purchase.

Final Takeaway

Shilajit versus Ashwagandha is not really a contest. Ashwagandha currently has the broader human evidence base, particularly for psychological stress and sleep, and it also has meaningful physical-performance research. Shilajit's human literature is smaller but includes genuine controlled findings around specific outcomes such as fatigue-related muscular performance and testosterone. Neither evidence base makes one ingredient universally better than the other.

Start with the outcome you actually care about, check whether the ingredient is appropriate for you, and choose a well-characterised product if you decide to use one. If neither gives you a clear reason to start, "neither for now" is a perfectly good answer.

Both belong to the wider Rasayana story. Modern evidence helps us distinguish where each has actually been tested in humans; Ayurveda reminds us that appropriate use matters more than declaring a winner.

"At 5 Rivers Nutrition, we do not need Shilajit to beat Ashwagandha for Shilajit to be worth taking seriously. Our job is to show you where the evidence differs, where the traditions overlap, what our formulation contains and what our testing can actually verify — then leave enough room for you to decide that Shilajit, Ashwagandha, both within an appropriate formulation, or neither is right for you. Rasayana is not about finding the herb that wins. It is about choosing appropriately — and sometimes choosing not to add anything at all."

What Do You Want to Understand Next?

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Frequently Asked Questions

Which is better, Shilajit or Ashwagandha?

Neither is universally better. Ashwagandha currently has the broader human evidence base, particularly for psychological stress, sleep and resistance-training performance. Shilajit has a smaller but genuine evidence base around fatigue-related muscular performance, testosterone and bone health. The right choice depends on the outcome you actually care about and whether the ingredient is appropriate for you.

Can you take Shilajit and Ashwagandha together?

They can be formulated together — Gold+ contains both. But there is no human trial showing that combining them produces additive or synergistic benefits over either ingredient alone. Choose a combined formula because you want the complete formulation, not because you cannot decide between the two ingredients.

Is Shilajit good for stress and anxiety?

Shilajit is not positioned as a psychological stress or anxiety supplement. Its human evidence is more relevant to physical fatigue, muscular performance and testosterone. Ashwagandha has the stronger direct human evidence for psychological stress and cortisol outcomes.

Is Ashwagandha good for energy and stamina?

Ashwagandha has human evidence for strength and endurance alongside resistance training. It should not be reduced to a "calming herb" — its physical-performance research is real. However, it is not established as an acute energy supplement in the way caffeine is.

Does Ashwagandha affect the thyroid?

Current NCCIH guidance advises that Ashwagandha is not recommended for people with thyroid disorders and notes possible interaction with thyroid hormone medication. Speak to your doctor or pharmacist before use if you have a thyroid condition.

Is Shilajit a testosterone booster?

Shilajit has a direct placebo-controlled human trial showing higher total and free testosterone after 90 days in healthy men aged 45–55. That is a credible signal, not a treatment for testosterone deficiency. Symptoms of low testosterone deserve clinical assessment rather than supplement trial-and-error.

Which one should I start with?

Start with the outcome that matters most to you. Psychological stress or sleep — Ashwagandha has the clearer evidence. Fatigue-related muscular performance or the specific Shilajit testosterone research — Shilajit may be more relevant. If you cannot identify a clear reason to choose either, neither is a valid answer for now.

Is Gold+ safe if I have been told to avoid Ashwagandha?

No. Gold+ contains Ashwagandha in both Capsules and Resin formats. If you have a reason to avoid Ashwagandha — particularly a thyroid condition, autoimmune condition or relevant medication — Gold+ is not an Ashwagandha-free alternative. A combination inherits the suitability questions of its ingredients.

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References

[1] Chandrasekhar K, Kapoor J, Anishetty S. A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of Ashwagandha root in reducing stress and anxiety in adults. Indian Journal of Psychological Medicine. 2012;34(3):255–262. PubMed

[2] Lopresti AL, Smith SJ, Malvi H, Kodgule R. An investigation into the stress-relieving and pharmacological actions of an Ashwagandha (Withania somnifera) extract. Medicine (Baltimore). 2019;98(37):e17186. PubMed

[3] Langade D, Kanchi S, Salve J, Debnath K, Ambegaokar D. Efficacy and safety of Ashwagandha (Withania somnifera) root extract in insomnia and anxiety. Cureus. 2019;11(9):e5797. PubMed

[4] Langade D, Thakare V, Kanchi S, Kelgane S. Clinical evaluation of the pharmacological impact of Ashwagandha root extract on sleep in healthy volunteers and insomnia patients. Journal of Ethnopharmacology. 2021;264:113276. PubMed

[5] Pingali U, Nutalapati C. Shilajit extract reduces oxidative stress, inflammation, and bone loss to dose-dependently preserve bone mineral density in postmenopausal women with osteopenia. Phytomedicine. 2022;105:154334. PubMed

[6] Keller JL, Housh TJ, Hill EC, et al. The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels. Journal of the International Society of Sports Nutrition. 2019;16:3. PubMed

[7] Wankhede S, Langade D, Joshi K, Sinha SR, Bhattacharyya S. Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. Journal of the International Society of Sports Nutrition. 2015;12:43. PubMed

[8] Verma N, Gupta SK, Tiwari S, Mishra AK. Safety of Ashwagandha root extract: a randomized, placebo-controlled, study in healthy volunteers. F1000Research. 2021;10:825; updated 2024. PubMed

[9] Pandit S, Biswas S, Jana U, et al. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia. 2016;48(5):570–575. PubMed

[10] National Center for Complementary and Integrative Health (NCCIH). Ashwagandha: Usefulness and Safety. Current 2026 guidance. View source

[11] Movva N, et al. Safety of high-dose Ashwagandha root extract supplementation in healthy adults: a prospective study. Frontiers in Nutrition. 2026;13:1823678. Prospective 12-week non-comparative safety study in 145 healthy adults at 2,000 mg/day.

[12] Biswas TK, Pandit S, Mondal S, et al. Clinical evaluation of spermatogenic activity of processed Shilajit in oligospermia. Andrologia. 2010;42(1):48–56. PubMed

[13] Das A, Datta S, Rhea B, et al. The human skeletal muscle transcriptome in response to oral Shilajit supplementation. Journal of Medicinal Food. 2016;19(7):701–709. PubMed

[14] NHS Specialist Pharmacy Service. Managing complementary products and conventional medicines. Updated 16 July 2026.

[15] Kamgar E, et al. Characterization of metal composition and molecular weight distribution in Shilajit samples from different geographical origins. Journal of Trace Elements in Medicine and Biology. 2026;96:127913. Demonstrates compositional variability across 12 samples.

[16] Thallium detection study in natural Shilajit and commercial supplements. 2025. Argues for regular monitoring and standardised testing; detection does not establish poisoning at ordinary use.

[17] Botanical Ingredient Forensics review. Discusses Ashwagandha root/leaf adulteration and analytical authentication challenges including withanolide profile differences between root and aerial parts.

[18] Urumarudappa SKJ, et al. DNA barcoding and quantitative PCR for authentication of Ashwagandha market samples. Journal of Ethnopharmacology. 2020. Found authentication problems more common in powdered than intact-root samples.