Quick answer. Ashwagandha and shilajit target different kinds of "energy." Ashwagandha (Withania somnifera) has the stronger human-trial base for stress-related, mental energy: calmer focus, better sleep, lower perceived stress. Shilajit, a fulvic-acid-rich Himalayan resin, is studied more for physical and exercise stamina, though its human evidence is thinner. They aren't rivals, and many people use both. Typical doses studied are ashwagandha 300–600 mg and shilajit ~250–500 mg daily. Check the cautions first.
If you spend any time on Indian wellness feeds, you have probably seen ashwagandha and shilajit sold for the same promise: "energy." A stressed-out professional and a gym-goer can both end up staring at the two, unsure which to buy.
This guide answers the question most "X vs Y" posts dodge honestly: which one is actually better for energy, and which kind of energy each one is studied for.
By the end you'll know where the evidence is strong, where it is thin, whether you can stack them, and a safe place to start, without us faking a winner.
Ashwagandha vs shilajit: the quick verdict
The honest answer is that ashwagandha and shilajit are not really rivals; they are studied for different kinds of "energy."
- Ashwagandha is the better-evidenced choice for stress-related, mental energy — a calmer, less-frazzled state, better sleep, and lower perceived stress. Its human clinical base is the stronger of the two.
- Shilajit is studied more for physical and exercise-related stamina. Its human evidence is thinner and much of its proposed mechanism comes from animal research, so treat it as promising rather than proven.
So the better framing is not "which one wins" but "which kind of energy do you want to support?" Many people who want both ends use both. Whichever you choose, read the cautions section first, since neither herb is right for everyone.
What each one is
Ashwagandha (Withania somnifera, root) is a small shrub whose dried root is used in Ayurveda as a rasayana — a calming, grounding herb traditionally used to help the body cope with stress and to support vitality. Its main studied compounds are withanolides. In modern wellness language it is usually called an adaptogen, and on-label in India it is used as a root extract (per the FSSAI root-only advisory of 16 April 2026; this status is litigated, so re-verify before relying on it).
Shilajit is a sticky, tar-like exudate that seeps from Himalayan rock. Its principal bioactives are fulvic acid and dibenzo-alpha-pyrones, plus trace minerals [5]. In Ayurveda it is a mineral-rich rasayana traditionally used for stamina and ageing well. One important caveat from that same review: raw, unpurified resin can carry heavy metals and other contaminants, so only purified, lab-tested shilajit should be consumed.
Ashwagandha for energy: what the evidence shows
Ashwagandha's reputation for "energy" is really a reputation for taking the brake off — lowering stress so your existing energy is less drained. That is where its human trials are strongest.
- May support a calmer, less-stressed state. In a double-blind, placebo-controlled RCT of 64 chronically stressed adults, ashwagandha root extract 300 mg twice daily for 60 days lowered perceived stress and serum cortisol versus placebo [1].
- May support memory, focus and sleep quality. In a separate double-blind, placebo-controlled RCT of stressed adults, sustained-release root extract 300 mg/day for 90 days improved memory, sleep quality and perceived stress versus placebo [2].
Put together, ashwagandha's "energy" is best understood as mental energy: calmer focus and better sleep that build gradually over weeks, not a sudden lift.
Important: even these are relatively small, short-term trials. Treat the evidence as suggestive and supportive, not definitive.
Shilajit for energy: what the evidence shows
Shilajit is marketed hardest for physical energy and stamina, so it deserves an honest grading: its human evidence is real but thin, and its headline mechanism is mostly animal-based.
- One small RCT suggests it may help retain muscular strength. In a double-blind, placebo-controlled trial of 63 recreationally active men, shilajit 500 mg/day for 8 weeks helped the high-dose group resist the decline in maximal voluntary strength after fatiguing exercise, versus placebo [3]. This is the strongest human signal for shilajit and "physical energy", but it is a single small study, in men only, and it measured strength retention, not a raw energy boost.
- The proposed "energy" mechanism is largely animal-grade. The idea that shilajit's fulvic acid and dibenzo-alpha-pyrones support mitochondrial ATP (your cells' energy currency) rests mainly on animal and mechanistic work. In a rat model of chronic fatigue, processed shilajit helped preserve mitochondrial function and modulated the stress (HPA) axis [4]. This was an animal study, so it shows a plausible mechanism, not a proven human energy benefit.
The takeaway: shilajit's physical-stamina story is biologically plausible and has one supportive human trial, but it is considerably thinner than ashwagandha's evidence base. Treat any rapid-energy-spike marketing with scepticism — no human trial supports a sudden surge.
Ashwagandha vs shilajit: a side-by-side
| Property | Ashwagandha | Shilajit |
|---|---|---|
| Origin | Root of Withania somnifera, a shrub | Purified resin/exudate from Himalayan rock |
| Energy type studied | Stress-related, mental energy (calm, focus, sleep) | Physical/exercise stamina (strength retention) |
| Strength of human evidence | Stronger, several RCTs | Thinner, one small RCT; mechanism mostly animal |
| Traditional Ayurvedic role | Calming, grounding rasayana | Mineral-rich rasayana for stamina |
| Doses used in studies | 300 mg once or twice daily | 250–500 mg/day (benefit signal at 500 mg) |
| Commonly taken | With food, often evening (for the sleep/stress angle) | Usually morning, with warm water or milk |
| Key cautions | May lower blood pressure; may affect thyroid hormones; avoid in pregnancy/lactation | Not for pregnancy/lactation; raw resin can carry heavy metals; caution in iron overload |
When to lean ashwagandha: if your "low energy" is really stress, poor sleep, or feeling mentally fried, ashwagandha is the better-evidenced starting point.
When to lean shilajit: if your goal is physical stamina and you want to support exercise performance, shilajit is the option with the more physical-energy-oriented (if thinner) evidence. Many people who want both kinds of support use both — see the next section.
Can you take them together?
There is no published RCT testing ashwagandha and shilajit together, so anything about the combination is informational rather than a tested protocol.
The logic people use is straightforward: ashwagandha for the stress/mental-energy side, shilajit for the physical-stamina side. Ayurveda traditionally describes shilajit as yogavahi — a carrier said to enhance the action of other herbs taken with it. This is a classical Ayurvedic concept from the texts, not something proven in modern pharmacokinetic trials, so we would not claim shilajit "increases the absorption" of ashwagandha as a fact.
If you do combine them, keep each within its own studied range (ashwagandha 300–600 mg and shilajit 250–500 mg daily) and treat the stack as informational, not a tested protocol. Because both herbs carry cautions (see below), the combination is best started under the guidance of a qualified practitioner, especially if you take any medication.
How to take each: dosage, timing, form
The figures below are the doses used in studies, not a personal recommendation.
| Herb | Dose used in studies | Commonly taken with | Commonly taken |
|---|---|---|---|
| Ashwagandha (root extract) | 300 mg once or twice daily | Food / warm milk | Often evening (sleep/stress angle) |
| Shilajit (purified) | 250–500 mg/day (signal at 500 mg) | Warm water or milk | Usually morning |
A few notes:
- Timing is "commonly," not "best." No trial compared morning versus night head-to-head. Ashwagandha is often taken in the evening because the studies targeted stress and sleep; shilajit is usually taken in the morning by custom. These are conventions, not proven protocols.
- Form is neutral. Resin versus capsule has not been compared for efficacy, so pick whichever you will actually take consistently.
- Purity matters most for shilajit. Insist on third-party heavy-metal lab testing (for example, ICP-MS) before buying any shilajit, because raw resin can carry contaminants [5].
Dosage varies by age, prakriti, and condition. Consult a practitioner.
When NOT to use either: cautions
Neither herb is right for everyone. Skip or seek medical advice first in these situations:
- Pregnancy and lactation: Ashwagandha should be avoided during pregnancy and is not recommended while breastfeeding [6]. As a general precaution, avoid shilajit too unless a doctor advises otherwise.
- Blood-pressure, diabetes, sedative and thyroid medications: Ashwagandha may lower blood pressure and may affect thyroid hormone levels, and can interact with these medications [6]. There is also a documented case of an existing hypothyroid patient developing thyroid overactivity after self-substituting ashwagandha for their thyroid medication [7], a single case report, not a population-wide risk, but a reason for caution if you have or treat a thyroid condition.
- Iron overload / haemochromatosis: Shilajit is mineral-rich and can add to iron load, so avoid it if you have iron-overload conditions.
- Raw or untested resin: Unpurified shilajit can carry heavy metals and other contaminants — only use purified, third-party-tested resin [5].
- Surgery, autoimmune conditions, liver concerns: Ashwagandha is generally cautioned before surgery and in autoimmune disease, and rare liver-injury reports exist [6].
If you are managing a chronic condition or taking prescription medication, please consult your doctor before starting any new supplement.
Our take: how they fit a modern Indian routine
For most people the choice is not ashwagandha or shilajit; it is "what is actually draining me?" If your energy problem is really stress, racing thoughts and broken sleep (the everyday reality of a packed Indian workweek), ashwagandha has the stronger evidence and is the more sensible first step. If your goal is physical stamina to support training, shilajit is the more physically oriented option, with the honest caveat that its evidence is thinner.
Plenty of people who want both kinds of support use both, ashwagandha in the evening and shilajit in the morning, within the studied ranges. That can be a reasonable, compliant way to support energy, stamina and overall well-being — provided you respect the cautions above and, ideally, check in with a practitioner first. If you would like a ready-made place to begin, the KayaSuddhi stress-relief range is built around calming, adaptogenic herbs such as ashwagandha.
If you want help building a routine around your own constitution, our complete guide to Ayurvedic energy and vitality is the place to start.
Frequently asked questions
Can I take shilajit and ashwagandha together?
Yes, many people do, since they target different kinds of energy — ashwagandha for stress and mental energy, shilajit for physical stamina. There is no clinical trial testing the two together, so the combination is informational rather than a tested protocol. Keep each within its studied range (ashwagandha 300–600 mg, shilajit 250–500 mg daily) and check with a practitioner first, especially if you take any medication.
Which works faster, shilajit or ashwagandha?
No head-to-head or time-course trial has compared how quickly the two are felt, so treat any "works faster" claim with caution. Mechanistically, ashwagandha works largely by lowering stress and cortisol, so its effects tend to build gradually. The trials ran 60 to 90 days. Shilajit's studied benefits are physical-performance-related. Neither has evidence for a rapid energy spike, so onset speed should not be stated as fact.
Which is better for gym and muscle building?
Neither has a clear "muscle-building winner." Shilajit has one small RCT suggesting it may help retain strength after fatiguing exercise [3]. Ashwagandha also has trials on strength and exercise performance. Both signals come from small studies. Treat either as exercise and strength support alongside training and nutrition, not as a promised body-transformation. Pick based on whether stress or physical stamina is your bigger gap.
Is shilajit safe for everyone?
No. Avoid shilajit during pregnancy and lactation, and if you have iron-overload conditions such as haemochromatosis, since it is mineral-rich. Crucially, raw or unpurified resin can carry heavy metals and other contaminants, so only purified, third-party lab-tested shilajit should be used [5]. If you take any medication or manage a chronic condition, consult a doctor before starting.
What is the best time to take shilajit and ashwagandha (morning vs night)?
No trial compared timing head-to-head, so these are conventions, not proven protocols. Ashwagandha is commonly taken with food, often in the evening, because its studies targeted stress and sleep. Shilajit is commonly taken in the morning with warm water or milk. If you use both, the usual pattern is shilajit in the morning and ashwagandha in the evening, but the timing has not been clinically optimised.
Can beginners take both supplements together?
A beginner can, but it is sensible to start one at a time and at the lower end of the studied range so you can tell what each is doing and spot any reaction. Because both herbs carry cautions (blood-pressure and thyroid interactions for ashwagandha, purity and iron concerns for shilajit), beginners on any medication or with a health condition should speak to a practitioner before combining them.
What is the dosage when taking shilajit and ashwagandha together?
There is no RCT testing the two together, so any combined dose is informational, not a tested protocol. The safest approach is to keep each within its own studied range: ashwagandha root extract 300–600 mg/day and purified shilajit 250–500 mg/day (the benefit signal in the shilajit trial was at 500 mg). Treat this as a starting point to discuss with a practitioner, not a prescription.
Is ashwagandha or shilajit better for stress?
Ashwagandha. It has the stronger human evidence for stress: a double-blind RCT found 300 mg twice daily for 60 days lowered perceived stress and cortisol versus placebo [1], and a separate RCT found 300 mg/day for 90 days improved perceived stress, sleep and memory [2]. Shilajit is studied more for physical stamina, not stress, so ashwagandha is the better-evidenced choice here.
Related reading
- Ashwagandha benefits, dosage and side effects
- Shilajit: an evidence and quality guide
- Ayurvedic energy and vitality in India — the complete guide — the full guide
Sources
- 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 J Psychol Med. 2012;34(3):255–262. https://pmc.ncbi.nlm.nih.gov/articles/PMC3573577/
- Gopukumar K, et al. Efficacy and safety of ashwagandha root extract on cognitive functions in healthy, stressed adults: a randomized, double-blind, placebo-controlled study. Evid Based Complement Alternat Med. 2021;2021:8254344. https://pmc.ncbi.nlm.nih.gov/articles/PMC8632422/
- Keller JL, et al. The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels. J Int Soc Sports Nutr. 2019;16(1):3. https://pmc.ncbi.nlm.nih.gov/articles/PMC6364418/
- Surapaneni DK, et al. Shilajit attenuates behavioral symptoms of chronic fatigue syndrome by modulating the hypothalamic–pituitary–adrenal axis and mitochondrial bioenergetics in rats. J Ethnopharmacol. 2012;143(1):91–99. https://pubmed.ncbi.nlm.nih.gov/22771318/
- Carrasco-Gallardo C, Guzmán L, Maccioni RB. Shilajit: a natural phytocomplex with potential procognitive activity. Int J Alzheimers Dis. 2012;2012:674142. https://pubmed.ncbi.nlm.nih.gov/22482077/
- National Center for Complementary and Integrative Health (NCCIH). Ashwagandha: Usefulness and Safety. Last updated March 2023. https://www.nccih.nih.gov/health/ashwagandha
- Kamal HI, Patel K, Brdak A, et al. Ashwagandha as a unique cause of thyrotoxicosis presenting with supraventricular tachycardia. Cureus. 2022;14(3):e23494. https://pmc.ncbi.nlm.nih.gov/articles/PMC9035336/
About this content. This article is for educational purposes only and is not medical advice. The statements have not been evaluated by AYUSH or FSSAI as treatment claims. KayaSuddhi products are not intended to diagnose, treat, cure, or prevent any disease. Please consult a qualified healthcare provider or BAMS-certified Ayurvedic practitioner before starting any new supplement, especially if you are pregnant, lactating, on prescription medication, or managing a chronic condition.
Results may vary. Not intended to diagnose, treat, cure or prevent any disease. Consult your physician.
Written & researched by
The KayaSuddhi Team
We are a small team of Ayurveda writers, researchers and reviewers in Delhi NCR. We track the health questions real people are asking, read the latest studies, and turn them into honest, practical guides — so you can make informed choices, not follow hype.
