What Is Shilajit? Tired, Foggy, Low Energy — What the Science Says

By the Cures For Life® Wellness Team • Updated September 2026 • ~9 min read

If you drag yourself through the afternoon, rely on a third cup of coffee to think clearly, and still feel wiped out by evening, you're not alone — and you're not imagining it. Persistent tiredness, brain fog and low energy are among the most common complaints people bring to their doctors. One ancient remedy keeps resurfacing in the modern conversation about natural energy: shilajit. But what actually is it, and does the science back up the hype? Let's separate the folklore from the evidence.

What is shilajit, exactly?

Shilajit (pronounced shil-uh-jeet) is a sticky, tar-like resin that oozes from cracks in rock in high mountain ranges — most famously the Himalayas, but also the Altai, Caucasus and other ranges. Over centuries, decomposed plant and microbial matter is compressed under layers of rock and, in the summer heat, seeps out as a dark, mineral-rich exudate. Traditional healers in Ayurvedic medicine have used it for well over a thousand years, calling it names that translate roughly to "conqueror of mountains and destroyer of weakness."

Chemically, shilajit is not a single compound but a phytocomplex — a natural blend of many bioactive substances. Its most important components are:

• Fulvic acid — the star of the show. This small, water-soluble molecule is a powerful antioxidant and acts as a natural "carrier," helping shuttle minerals and other compounds into cells. High-quality shilajit is often standardized to its fulvic acid content.
• Humic substances — larger organic molecules that contribute to shilajit's antioxidant profile.
• Dibenzo-α-pyrones (DBPs) — compounds studied for their role in energy metabolism and neuroprotection.
• Trace minerals — shilajit naturally contains dozens of trace minerals in ionic form, including iron, zinc, magnesium and more.

According to a widely cited review in the International Journal of Alzheimer's Disease, the fulvic acid in shilajit is considered its principal active ingredient, and much of the resin's traditional and studied benefits are attributed to it.¹

Why do you feel tired, foggy and low on energy?

Before we look at what shilajit may do, it helps to understand why fatigue happens in the first place. Everyday tiredness and brain fog usually trace back to a handful of overlapping factors:

• Cellular energy production. Every cell makes its energy (a molecule called ATP) in tiny structures called mitochondria. When mitochondria are stressed by oxidative damage, aging or poor lifestyle, they make energy less efficiently — and you feel it as fatigue and mental fog.
• Oxidative stress. An imbalance between damaging free radicals and protective antioxidants accelerates that mitochondrial wear and tear.
• Nutrient and mineral gaps. Shortfalls in iron, magnesium, vitamin D and other nutrients are common and strongly linked to low energy.
• Hormones. Declining testosterone in men (and shifting hormones in women), as well as stress hormones, can sap vitality, drive, and recovery.
• Sleep, stress and lifestyle. The unglamorous fundamentals — poor sleep, chronic stress, inactivity and a processed diet — remain the biggest levers of all.

Interestingly, shilajit is studied in relation to several of these exact pathways — mitochondrial energy, antioxidant defense, minerals and hormones — which is why it keeps coming up in conversations about tiredness and focus.

What the science says about shilajit

Shilajit is an old remedy, but the modern research base, while still growing, is more substantial than most people expect. Here's what studies actually show, area by area — along with honest limits.

1. Energy, mitochondria and fatigue

The most promising mechanism behind shilajit's "energy" reputation is its interaction with mitochondria. Researchers have proposed that shilajit's fulvic acid and dibenzo-α-pyrones help protect mitochondria from oxidative stress and support the electron transport chain — the assembly line where cells convert food into ATP. In laboratory and animal research, shilajit has been described as a "mitochondrial energizer," and it has been studied for its ability to help preserve energy output under stress and fatigue conditions.^1,4

Shilajit has also been studied alongside Coenzyme Q10 (CoQ10), a nutrient central to mitochondrial energy. Research suggests the two may work synergistically, with shilajit helping to stabilize CoQ10 in its active form so cells can use it more efficiently. The practical upshot people report — steadier stamina and less of an afternoon crash — is consistent with better mitochondrial efficiency, though larger human trials are still needed to confirm the size of the effect.⁴

2. Testosterone and vitality

One of the strongest human studies on shilajit looked at testosterone in men. In a randomized, double-blind, placebo-controlled trial published in the journal Andrologia, healthy men aged 45–55 took purified shilajit (250 mg twice daily) for 90 days. Compared with placebo, the shilajit group showed significant increases in total testosterone, free (active) testosterone and DHEAS, with total testosterone rising roughly 20% over the study.²

Because testosterone influences energy, motivation, muscle, mood and libido — especially as men age — this is a meaningful finding for anyone whose fatigue and low drive have a hormonal component. It's one clinical trial in middle-aged men, so it shouldn't be over-generalized, but it's a well-designed study pointing in a promising direction.

3. Brain, focus and neuroprotection

The "foggy" part of tired-and-foggy is where some of the most intriguing science sits. The review in the International Journal of Alzheimer's Disease highlighted fulvic acid's potential "pro-cognitive" activity, noting that it may help prevent the abnormal clumping of tau protein — a process involved in neurodegeneration.¹ The authors proposed shilajit's fulvic acid as a compound worth studying for brain aging and memory.

More recent summaries of the research continue to point to shilajit's antioxidant and neuroprotective properties as areas of active investigation, including its possible role in supporting brain health as we age.³ It's important to be clear-eyed here: this is promising early research, much of it preclinical, and shilajit is not a treatment or cure for any cognitive condition. But for everyday mental clarity and focus, the antioxidant support and better cellular energy are consistent with why people say they feel "sharper" on it.

4. Antioxidant defense and healthy aging

A recurring theme across the research is shilajit's antioxidant activity, driven largely by fulvic and humic substances that scavenge free radicals. Since oxidative stress underlies much of fatigue, cellular aging and inflammation, this antioxidant capacity is thought to be one of the unifying reasons shilajit shows up across so many different benefit areas — from energy to brain to recovery.^1,4

5. Minerals, iron and altitude endurance

Traditionally, shilajit was prized by mountain communities for stamina and adaptation to high altitude, and it naturally supplies iron and other trace minerals in a highly absorbable, ionic form. Some research and traditional use point to a role in supporting healthy iron levels and physical endurance. As always, iron is a nutrient where more isn't automatically better, so this is a benefit to appreciate rather than a reason to megadose.⁴

How to take shilajit

Shilajit resin is potent and a little goes a long way. Here's the simple approach:

• Start with a rice-grain-size portion (roughly 250–500 mg) once a day.
• Dissolve it in warm liquid — water, coffee, tea or milk. The resin softens and blends in; it has an earthy, slightly bitter taste that most people don't mind in coffee or tea.
• Take it consistently. Like most adaptogens, shilajit's benefits build with regular daily use over weeks, not from a single dose. Many people take it in the morning for daytime energy and focus.
• Give it time. The testosterone trial ran 90 days; think in terms of a consistent month or two before judging results.²

Not all shilajit is equal: what quality really means

This is the most important section in the whole article, because shilajit is a natural rock exudate — and raw, unpurified shilajit can carry the one thing you don't want: heavy metals. Safety reviews consistently identify contamination with lead, arsenic, cadmium or mercury as the primary concern with poorly processed shilajit scraped straight from rock.⁴

That's why purification and testing are non-negotiable. Properly processed shilajit is filtered to remove rock sediment and heavy metals and standardized for its active fulvic acid content. When you shop, look for:

• Purified resin (not raw), ideally standardized to a stated fulvic acid percentage.
• Third-party lab testing and a certificate of analysis (COA) for heavy metals and purity.
• Transparent sourcing and a reputable brand.

Who should be cautious?

Shilajit is generally well tolerated when purified and used as directed, with studies showing no significant side effects over three months of use.⁴ That said, it isn't right for everyone:

• Pregnant or nursing women should avoid it, as safety hasn't been established.
• People with high iron levels (or conditions like hemochromatosis) should be cautious, since shilajit contains iron.
• Anyone on medication — especially for blood pressure, diabetes, or hormone-related conditions — should check with their doctor first.
• Only use purified, tested products to avoid heavy-metal exposure from raw resin.

As with any supplement, talk to your healthcare provider before starting, particularly if you have a medical condition.

The bottom line

Shilajit is a mineral-rich, fulvic-acid-packed resin with a thousand-year traditional reputation for combating fatigue and building stamina — and modern science is beginning to explain why. The evidence is strongest and most plausible around mitochondrial energy support, antioxidant defense and testosterone in men, with promising early research on brain health and cognition. It is not a magic bullet or a replacement for good sleep, movement and nutrition — but as a clean, daily addition to a healthy routine, it's one of the more interesting natural options for people who feel tired, foggy and low on energy.

If you try it, choose a purified, lab-tested, high-fulvic-acid product, take a rice-size portion daily, and give it a few weeks of consistency. Your mitochondria may thank you.

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References

1. Carrasco-Gallardo C, Guzmán L, Maccioni RB. Shilajit: A Natural Phytocomplex with Potential Procognitive Activity. International Journal of Alzheimer's Disease, 2012. Read the study (PDF)
2. Pandit S, Biswas S, Jana U, De RK, Mukhopadhyay TK, Saha BP. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia, 2016;48(5):570–575. PubMed
3. Ubie Health. Shilajit, Alzheimer's Research & Brain Neuroprotection (Doctor's Note). ubiehealth.com
4. Verywell Health. The Benefits of Shilajit. verywellhealth.com

Disclaimer: This article is for general educational purposes only and is not medical advice. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary. Consult your healthcare provider before starting any new supplement, especially if you are pregnant, nursing, taking medication, or managing a medical condition.