Urolithin A vs Shilajit: How Two Popular Energy Supplements Compare

Scroll any wellness feed and you will find urolithin A and shilajit sitting side by side, both promising more energy and healthier aging. They could hardly be more different in origin: one is a purified molecule born of modern gut-microbiome science, the other a tar-like substance scraped from Himalayan rock and used for centuries in traditional medicine. So how do they actually compare — and which one fits your goal? Here is an evidence-graded look, with the human research labeled honestly.

What is urolithin A?

Urolithin A is a postbiotic — a compound your gut bacteria produce when they break down ellagitannins, the polyphenols in pomegranate, walnuts, and some berries. The catch is that only an estimated minority of people host the right gut bacteria to make meaningful amounts, which is why standardized urolithin A is taken directly as a supplement rather than left to chance.

Its signature mechanism is mitophagy: the housekeeping process by which cells identify damaged, inefficient mitochondria and recycle them so fresher ones can take over. Because mitochondria are the cell’s power plants, keeping that population clean is central to cellular energy (our plain-language guide to mitophagy explains the process step by step). Urolithin A’s biology has been characterized in detail across preclinical and clinical work (D’Amico et al., 2021, Trends in Molecular Medicine).

What is shilajit?

Shilajit is a sticky, resinous exudate that seeps from rocks in mountain ranges such as the Himalayas, formed over long periods from decomposed plant matter. Its most-discussed components are fulvic acid, humic substances, and a spread of trace minerals, along with small molecules called dibenzo-alpha-pyrones. In Ayurvedic tradition it has been used as a general tonic.

Unlike urolithin A, shilajit is not a single molecule — it is a complex mixture, and its exact makeup depends on where and how it was collected and processed. That variability is the central challenge in interpreting shilajit research: two products labeled ‘shilajit’ can differ substantially. Reviews of its chemistry highlight fulvic acid as a likely active fraction with antioxidant properties, though much of the mechanistic work remains preclinical (Carrasco-Gallardo et al., 2012, International Journal of Alzheimer’s Disease; PRECLINICAL).

How they work: two different mechanisms

This is where the comparison gets interesting, because the two supplements are not aiming at the same target.

Urolithin A acts on a specific, well-mapped pathway. By promoting mitophagy, it supports the turnover of the mitochondrial pool — a process that naturally slows with age. In the first-in-human trial, four weeks of standardized urolithin A at 500 mg or 1,000 mg shifted skeletal-muscle mitochondrial gene expression and plasma acylcarnitine patterns toward a signature the authors described as improved mitochondrial health, with a favorable safety profile (Andreux et al., 2019, Nature Metabolism; HUMAN).

Shilajit’s proposed mechanisms are broader and less precisely defined: antioxidant activity from fulvic acid, mineral contribution, and possible support of mitochondrial energy handling. These are plausible but rest on a thinner and more mixed evidence base than urolithin A’s mitophagy pathway.

What the human research shows

Here the gap is clearest. Urolithin A has a growing set of randomized, placebo-controlled human trials. In older adults aged 65 to 90, four months of 1,000 mg daily improved measures of muscle endurance and shifted plasma biomarkers of mitochondrial health, even though it did not significantly change the six-minute walk distance (Liu et al., 2022, JAMA Network Open; HUMAN). In middle-aged adults, four months of supplementation improved leg muscle strength by about 12% alongside mitochondrial biomarkers, while grip strength and VO2 max did not change significantly (Singh et al., 2022, Cell Reports Medicine; HUMAN).

Those results deserve a fair frame. A 2026 systematic review that pooled five urolithin A randomized trials described the overall effect on muscle outcomes as directionally favorable but statistically inconclusive, with low certainty (Dao et al., 2026, Frontiers in Nutrition). So "more research" here means more and larger trials than shilajit, not proof of a large effect.

Shilajit’s human trials are fewer and smaller. In one eight-week, placebo-controlled study of 63 recreationally active men, a higher daily dose of standardized shilajit helped retain maximal muscular strength after a fatiguing exercise protocol better than a lower dose, though several benefits reached significance only within a subgroup (Keller et al., 2019, Journal of the International Society of Sports Nutrition; HUMAN). A separate 90-day trial in healthy middle-aged men reported that purified shilajit raised total testosterone compared with placebo (Pandit et al., 2016, Andrologia; HUMAN). These are genuine human data, but the trials are small and industry-linked, so they should be read as early signals rather than settled conclusions. The testosterone finding also comes with a caveat: it was measured in healthy men, and it says nothing about energy or mitochondrial function directly.

Side-by-side comparison

Safety and quality

Both have been reasonably well tolerated in their published studies, with no serious safety signals reported at studied doses. That said, the studies are short, mostly a few weeks to a few months, so long-term safety data are limited for both. The quality picture, though, differs. Because urolithin A is a single, purified compound, what you get is defined. Shilajit’s natural origin is its weak point for safety: raw or poorly processed material can contain heavy metals and other contaminants, so purification and independent testing are essential. If you choose shilajit, look for a purified product with a certificate of analysis that reports lead, arsenic, mercury and cadmium, ideally from an independent lab. The same habit is worth applying to any urolithin A product: check that purity and dose are independently verified rather than taking the label on trust. As with any supplement, anyone pregnant, nursing, on medication, or managing a health condition should talk with a healthcare professional before starting either.

Can you take both?

There is no established reason the two cannot coexist in a routine, since they act through different mechanisms — but there is also no human research testing the combination, so any claim of synergy would be speculation. If your interest is specifically in cellular energy and mitochondrial support, urolithin A is the more directly studied choice. A sensible approach is to prioritize based on your goal rather than stacking everything at once, and to change one variable at a time so you can tell what is actually doing something. Our guide to stacking urolithin A with other supplements covers how to sequence additions.

How to choose

Match the supplement to the goal. If what you care about is mitochondrial health, cellular energy, and muscle performance — and you want the option with the strongest human trial record — urolithin A is the more evidence-backed pick, and a once-daily SOMA Urolithin A gummies dose makes it easy to stay consistent at the amounts used in research. If you are drawn to a traditional, mineral-rich tonic and understand that the evidence is earlier-stage, a well-purified shilajit may appeal — just prioritize purity. The two are tools for different jobs, not rivals for the same one. Whichever you choose, give it a fair, consistent trial and judge it against how you actually feel and perform over a couple of months.

Frequently asked questions

Is urolithin A or shilajit better for energy?

They support ‘energy’ differently. Urolithin A targets the mitochondria that generate cellular energy and has more human trial support for mitochondrial and muscle outcomes. Shilajit is a broader mineral-and-antioxidant tonic with a smaller evidence base. Neither is a stimulant, so do not expect a caffeine-style lift from either; see what urolithin A can and cannot do for energy for realistic expectations. Persistent fatigue is also worth raising with your doctor, since it can have many causes.

Do they do the same thing?

No. Urolithin A promotes mitophagy — cellular renewal of mitochondria. Shilajit supplies fulvic acid, minerals, and antioxidant compounds. The mechanisms and the research behind them are quite different.

Which has more research behind it?

Urolithin A, clearly. It has multiple randomized, placebo-controlled human trials on muscle and mitochondrial outcomes, whereas shilajit’s human trials are fewer, smaller, and more variable.

Is shilajit safe?

Purified shilajit has been reasonably tolerated in studies, but raw or poorly processed material can contain heavy metals. If you use it, choose a purified, third-party-tested product, and consult a healthcare professional if you take medication or have a health condition.

Can I take urolithin A and shilajit together?

There is no known conflict, but no human study has tested the pairing, so any ‘synergy’ claim is speculative. If cellular energy is your main goal, urolithin A is the more directly studied option to start with.

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