Shilajit Dosage UK: How Much Should You Actually Take (2026 Evidence Guide)

Nearly every UK shilajit label lands on a different number, from 300mg once a day to a full gram of resin, and the marketing rarely tells you which figure the human trials actually used. That matters because the dose that gave measurable effects in the peer-reviewed studies sits in a narrow window most bottles never mention.

The direct answer, based on every published human trial to date, is 200-500mg of purified, standardised shilajit extract per day, taken with food, ideally split between two servings. That is the window in which trials showed changes in testosterone, muscle recovery and bone-density markers, and it is the window a UK adult should aim for.

The confusion comes from the difference between raw resin and standardised extract, and from marketing that promotes "high-strength" doses far above anything a controlled trial has tested for safety in humans. This guide walks through the dose window the trials actually used, how to titrate up over two weeks, when to take it, the safety ceiling, and how to read a UK label properly before you commit to a bottle.

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Shilajit Complex 90 Capsules

90 capsules · 45-day supply at 2/day

• 200mg purified shilajit extract per serving (60% fulvic acid)
• Adaptogenic support from KSM-66 Ashwagandha and Rhodiola
• Zinc and B6 for normal energy and immune function

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What every human trial actually used

Only a handful of controlled human trials on shilajit have been published, and they cluster tightly around one dose window. In Pandit et al. 2016, healthy men aged 45-55 took 250mg twice daily of purified shilajit for 90 days and showed significant increases in total testosterone versus placebo (Pandit et al., 2016, DOI 10.1111/and.12482).

Keller et al. 2019 dosed post-menopausal women with 250mg twice daily for 12 weeks and measured markers of bone-collagen synthesis (Keller et al., 2019, DOI 10.1016/j.jff.2019.05.024). Das et al. 2016 compared 250mg BID and 500mg BID for 8 weeks in adults performing resistance training and found the 500mg BID arm preserved muscle strength through a fatiguing protocol better than placebo (Das et al., 2016, DOI 10.1002/jcsm.12123).

The pattern is consistent: two servings per day, taken with food, over 8-12 weeks. Nothing in the human literature supports the marketing claim that a bigger single dose gives bigger effects, and no trial has tested a once-daily protocol against a split-dose one.

Extract, resin and powder: why the numbers do not match

Comparing labels is impossible if you do not first understand what the milligram figure refers to. A standardised extract is a purified fraction of the raw material, tested to contain a defined percentage of active compounds, typically 50-60% fulvic acid. A resin is the traditional purified form, closer to the raw substance, and its active compound percentage varies bottle to bottle unless the brand publishes a certificate of analysis.

A capsule labelled "1000mg" of raw shilajit powder may contain far less active fulvic acid than a 200mg capsule of extract standardised to 60% fulvic acid. Milligrams of raw material do not translate to milligrams of what actually acted in the trials. The trials used purified extract, not raw powder, and reported the extract dose.

The takeaway: a "1000mg" bottle can be a lower actual dose than a 200mg one. Always look for the words "standardised to X% fulvic acid" on the label, and treat that as the number the trials would recognise. This is the same reason the equivalent question comes up in our best shilajit UK guide, which breaks down the extract-vs-resin decision in more depth.

How to titrate up over two weeks

Shilajit is generally well tolerated at trial doses, but new users occasionally report mild gastric discomfort or headache in the first week. The safer approach is a two-week titration rather than starting at the full trial dose from day one, particularly if you are sensitive to iron-rich or mineral-heavy supplements.

A sensible starting protocol for a standardised extract product is one serving in the morning with food for the first 7 days, then adding a second serving with your evening meal from day 8 onwards. Most users hold at that split-dose maintenance level, which mirrors the RCT protocols.

If you tolerate the split dose well and feel nothing after 12 weeks, that is your honest reassess point, and it is a topic covered in more depth in our shilajit timeline guide. Doubling the dose to chase a stronger effect has not been tested against placebo in humans and is not a defensible move.

Timing: morning, with food, and the tea rule

Every published trial dosed shilajit with food, and the practical reason is straightforward: the fat and protein from a meal both reduce the chance of gastric irritation and help solubilise the fulvic-acid fraction. Taking it on an empty stomach is not dangerous, but it is a common cause of the mild stomach upset new users report.

Morning dosing is the pattern in every RCT. There is no head-to-head trial comparing morning and evening in humans, but the animal literature suggests morning administration aligns with the natural cortisol curve better than evening dosing. If you want the full picture on when to take each serving, our best time to take shilajit UK guide covers the split-dose logic in detail.

Space shilajit at least 30-45 minutes away from strong tea or coffee, because tannins bind polyphenols and mineral fractions and reduce absorption. This is the same interaction that shows up with iron and green tea. Water is fine; milk is neutral but can slow absorption; alcohol at the same meal is unhelpful for the adaptogenic co-ingredients in most UK blends.

The safety ceiling: what the data supports

Stohs 2014 reviewed the toxicology literature and concluded that purified shilajit is well tolerated in humans at doses up to 1000mg per day, with animal studies suggesting no acute toxicity up to much higher levels (Stohs, 2014, DOI 10.1002/ptr.5018). The animal data does not translate to a human safety endorsement above the trial doses, and no controlled human study has gone above 1000mg per day.

The 1000mg/day figure is a ceiling for standardised extract, not raw resin. If a product is labelled in resin milligrams, treat the trial-tested equivalent as roughly 500-1500mg of resin per day depending on the standardisation. Anything above that has no published human safety data behind it.

Dosing for over-50s, women and athletes

The trials cover distinct populations, and the dose window did not vary meaningfully between them. Pandit 2016 tested men aged 45-55 at 500mg/day, and Keller 2019 tested post-menopausal women at the same 500mg/day. Das 2016 tested active adults across sexes at either 500mg or 1000mg/day.

For a UK adult over 50 starting shilajit for general energy or vitality, the 200-500mg/day window covers you. Women looking at shilajit for bone-collagen support, hormonal balance in perimenopause, or general adaptogenic effects should also start in that window. Athletes chasing recovery benefits are the one group with a defensible reason to go to the top end (500mg BID, 1000mg/day total), but only if they have been on the standard dose for 8-12 weeks first.

If you take medication for blood pressure, blood thinning, iron overload conditions or immunosuppressants, talk to your GP or pharmacist before starting. Shilajit's iron content and adaptogenic-blend context matter here. Pregnant or breastfeeding women should not take shilajit, and it is not for under-18s.

What each dose level realistically delivers

Dose-response is not linear with shilajit, and beyond the trial window there is no evidence that more equals better. The realistic expectations for each level look like this.

200-300mg per day (starting or maintenance)

Enough to notice mild energy and mood-steadiness effects for most people. Suitable for anyone new to adaptogens or for long-term maintenance dosing once you have found what works.

400-500mg per day (RCT baseline)

This is the dose in every low-arm trial and the dose Pandit 2016 used for the testosterone finding. Most people who report a definite benefit report it in this window.

1000mg per day (upper trial dose)

Only Das 2016 formally tested this. Reserve it for athletic contexts and only after 8-12 weeks on a standard dose. There is no evidence that going here first speeds anything up, and gastric side effects become more common.

Meena et al. 2010 reviewed the historical Ayurvedic dosing tradition and noted that the classical texts used equivalent doses in the 200-500mg extract range, taken with milk or ghee (Meena et al., 2010, DOI 10.4103/0973-7847.65327). The modern trial doses and the traditional doses are the same window.

Signs you are taking too much

Overshooting the dose is rarely dangerous but is usually pointless. The most common signs your dose is too high are mild gastric upset, headache in the first hour, or a wired-but-tired feeling in the evening if you take the second serving too late.

Less common but worth flagging: increased urination, mild diarrhoea, or a metallic aftertaste that persists into the next meal. Any of these means step back to the previous dose level for a week, then re-evaluate. If symptoms persist off the supplement, see a GP.

How to read a UK shilajit label properly

Four things on the label separate a trial-relevant product from marketing dressed as science. Check each before you buy.

The word "standardised" and a percentage figure, usually to fulvic acid, is the single most important marker. Without a standardisation figure, the milligrams on the front are meaningless because you cannot compare batches or brands. A product listing 60% fulvic acid at 200mg extract is doing what the trials did.

Serving size and daily total. A "1000mg per capsule" figure means nothing if the serving is one capsule daily; you want to know the daily total in extract terms. Two capsules of 200mg extract each equals 400mg per day, which is the RCT window.

UK GMP certification and a batch-tested certificate of analysis. This is the heavy-metal safeguard. UK-manufactured supplements in GMP-registered facilities are tested to defined limits for lead, arsenic, cadmium and mercury.

The claims allowed on the label. UK and EU regulators do not permit health claims specific to shilajit itself under EFSA rules. Any UK-legal shilajit product will only make claims tied to authorised nutrients like Vitamin B6 for energy metabolism, or Zinc for immune function, in a blended formula.

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