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Adaptogens

Ashwagandha and Shilajit

Ashwagandha and shilajit are often sold together. What each was studied for, where the two differ, and whether taking both at once makes sense.

Written byNico Jaroszewski
Published
Two open capsule jars photographed side by side on a plain surface.
AI-assisted preview image. Replace with approved original photography before publication.

Adaptogen is a category, not a mechanism. Two things in the same category can have been studied for entirely different outcomes, which is the case here.

What each was studied for

Ashwagandha Shilajit
What it is Root extract of Withania somnifera Resin from high-altitude rock
Studied for Stress and cortisol Testosterone markers, strength retention
Named trial Chandrasekhar 2012 Pandit 2016, Keller 2019
Trial length 60 days 90 days, 8 weeks

Chandrasekhar and colleagues (2012) reported a 27.9% reduction in serum cortisol against placebo over 60 days in a chronically stressed adult population. That is a measured marker in one trial, not a promise about how anyone will feel.

Shilajit’s literature points elsewhere: Pandit (2016) at testosterone and DHEAS, Keller (2019) at strength after fatigue. Neither substance has been trialled against the other, and the combination has not been trialled at all.

Does pairing them make sense?

The argument for pairing is that the outcomes barely overlap, so there is little reason to expect one to interfere with the other. That is a reasonable expectation. It is not a finding.

The argument against starting with both is practical. Change one thing at a time and you can attribute what you notice. Change two and you cannot.

Cautions

Ashwagandha is not for use in pregnancy or breastfeeding, and anyone with a thyroid condition should take advice first. Shilajit is iron-rich and unsuitable for anyone with haemochromatosis. Neither treats, cures or prevents any condition.

Related: what is shilajit, how to take shilajit, fulvic acid.

Questions

Can you take ashwagandha and shilajit together?

They are commonly sold and taken together, and no interaction between them is established. No trial has tested the combination, so any benefit of pairing them is inference rather than evidence.

What is the difference between ashwagandha and shilajit?

Ashwagandha is a root extract studied mainly for stress and cortisol. Shilajit is a mineral-rich resin studied mainly for testosterone markers and strength retention. Different substances, different literature.

Which should I start with?

Start with one, not both. A single change over a month tells you something. Two changes at once tell you nothing about which did what.

Who should avoid ashwagandha?

It is not recommended in pregnancy or breastfeeding, and people with thyroid conditions or on thyroid medication should speak to a clinician first.

Sources

  1. A prospective, randomized double-blind study of safety and efficacy of ashwagandha root extractIndian Journal of Psychological MedicineStudyAccessed 3 September 2026
  2. Clinical evaluation of purified shilajit on testosterone levels in healthy volunteersAndrologiaStudyAccessed 3 September 2026

Who wrote this

Nico Jaroszewski

Shilajatu is written and run by one person, from Winterthur in Switzerland. Every article is edited by a human before it is published, and where something is not known yet the page says so.

How we work

Keep reading

The questions everyone asks

What is shilajit, actually?

A dark resin that seeps out of rock at altitude in the Himalaya, made of plant matter pressed and broken down over a very long time. What comes off the rock is not the product. Shodhana, the purification step, is what separates the resin from everything it was sitting in, and that is the step worth asking a seller about.

Why does fulvic acid matter?

Fulvic acid is a carrier molecule. It binds trace minerals and is studied as a way of getting them across a cell membrane, which is why the interesting question about a mineral is not how much is in the jar but how much of it arrives. That is the mechanism the research is built on. It is a line of study, not a settled fact, and nobody should sell it to you as one.

How much do I take, and when would I notice anything?

A rice-grain portion, dissolved in warm water or under the tongue, once a day. A 30g jar lasts two to three months at that dose. Shilajit is not a stimulant and nothing here works like one, so the honest unit of time is a month rather than an afternoon. If you want the caffeine experience this will disappoint you.

Resin or capsules?

Resin is the whole-spectrum mineral load and it tastes like it does. Capsules are 500mg split evenly between a standardised active and purified resin, in a vegan HPMC shell with no rice flour, no magnesium stearate and no bulking agent. Six blends, each built on the same resin. One caution: the Sea Moss and Bladderwrack blend is naturally high in iodine, so if you have Hashimoto’s or any diagnosed thyroid condition, take that one to your doctor rather than to the checkout.

Where does it come from, and how do I know it is clean?

Collected at altitude in Nepal and purified in a GMP-certified facility. Rock carries whatever the rock carried, which in the Himalaya can mean lead, arsenic and mercury, so every batch is tested for heavy metals by a third-party laboratory and a certificate of analysis is held for the batch you receive. A jar that cannot show you what came out the other side is asking you to take that on faith.

Do you ship outside Europe?

The launch markets are the EU, the UK and Switzerland. Australia, New Zealand, Canada and Ireland get shipping rates without a localised site. Rates and delivery times go up once fulfilment confirms them.

Purified, lab tested, sold as it is

Resin of the Himalayas

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