{"url":"https://whatshealthyandwhy.com/shilajit/ancient-adaptogen","path":"/shilajit/ancient-adaptogen","alternates":{"json":"https://whatshealthyandwhy.com/api/articles/shilajit/ancient-adaptogen.json","markdown":"https://whatshealthyandwhy.com/shilajit/ancient-adaptogen.md"},"topic":{"slug":"shilajit","name":"Shilajit","url":"https://whatshealthyandwhy.com/shilajit"},"slug":"ancient-adaptogen","order":1,"title":"Ancient Adaptogen: Fulvic Acid and Mineral Pitch","question":"Does shilajit raise testosterone or reduce exercise fatigue?","answer":"Shilajit likely raises testosterone modestly in men, and one trial found less exercise-related strength loss, but trials are small.","description":"How this Himalayan mineral resin supports testosterone, mitochondrial energy, and cognitive health through fulvic acid and dibenzo-alpha-pyrones","confidence":3,"confidenceNote":"A 96-man placebo RCT raised testosterone, an uncontrolled study of 35 agreed, and a 63-man RCT showed less strength loss; all small.","evidenceSummary":{"rctCount":2,"observationalCount":2,"metaAnalysisCount":0,"totalParticipants":"190+","replicated":false,"newestStudyYear":2019},"category":{"categoryTitle":"What's Good For You","categorySlug":"good-for-you","subcategoryName":"Supplements & Vitamins","subcategorySlug":"supplements","url":"https://whatshealthyandwhy.com/explore/good-for-you/supplements"},"actions":["Buy purified, standardized shilajit (the studied extract had at least 50% fulvic acid), not raw resin from unverified sources.","The two placebo-controlled trials found benefit at 500 mg a day of purified shilajit, for 8 weeks to 90 days [2][3]."],"cautions":["Raw or unpurified shilajit can contain heavy metals, fungal contamination and inconsistent potency.","Testosterone rises are modest and not a substitute for medical hormone therapy; check with a doctor if you have low testosterone or fertility problems.","Brain-protection claims come from cell studies only; human cognitive trials are lacking [4]."],"simpleText":"Shilajit is a dark, tar-like resin that forms over centuries as plant material decomposes in the rock crevices of high-altitude mountain ranges — primarily the Himalayas, Altai, and Caucasus. It has been used in Ayurvedic medicine for thousands of years under the Sanskrit name meaning \"conqueror of mountains.\" Modern analysis has confirmed why: shilajit is exceptionally rich in fulvic acid, dibenzo-alpha-pyrones, and more than 80 trace minerals in ionic form. Clinical trials show it can raise testosterone in men of all ages [1][2], reduce fatigue-related muscle strength loss [3], and may protect the brain against the protein tangles associated with Alzheimer's disease [4]. At 250–500 mg of purified, standardized shilajit daily, it's one of the more well-studied Ayurvedic compounds.","mediumText":"What Makes Shilajit Distinctive\n\nUnlike most supplements derived from a single plant or isolated compound, shilajit is a geological product — essentially a mineral-rich humic substance created by the slow pressure-decomposition of organic matter. Its two primary active fractions are:\n\nFulvic acid — a low-molecular-weight humic compound that serves as a carrier molecule, dramatically improving the cellular uptake of minerals and nutrients. It also has its own antioxidant and anti-inflammatory properties and has been shown to inhibit tau protein aggregation in vitro — the neurofibrillary tangles central to Alzheimer's pathology [4].\n\nDibenzo-alpha-pyrones (DBPs) — unique to shilajit, these compounds interact with mitochondria, helping to maintain the electron transport chain's efficiency and protect mitochondrial membrane potential. They're thought to be a key driver of shilajit's anti-fatigue and energy-supporting effects [5].\n\nThe combination of these compounds in a natural mineral matrix is what makes shilajit difficult to replicate synthetically.\n\nTestosterone and Male Hormonal Health\n\nTwo controlled clinical trials have examined shilajit's effects on testosterone. In men with oligospermia (low sperm count), 100 mg twice daily for 90 days produced a 61.4% increase in sperm count, 12–17% improvement in motility, and a 23.5% increase in total testosterone [1]. These were men with established fertility issues, but the testosterone effect extended to healthy middle-aged men as well.\n\nIn a randomized, double-blind, placebo-controlled trial, healthy men aged 45–55 taking 250 mg of purified shilajit twice daily for 90 days saw statistically significant increases in total testosterone, free testosterone, and DHEAS — the precursor hormone to both testosterone and estrogen [2]. Importantly, LH and FSH levels remained stable, meaning the increase wasn't driven by gonadotropin stimulation but rather appeared to reflect a more direct effect on steroidogenesis.\n\nThis makes shilajit potentially useful for men experiencing age-related hormonal decline, though it shouldn't be conflated with pharmaceutical testosterone replacement — the effect size is more modest and the mechanism is different.\n\nPhysical Performance and Muscle Preservation\n\nAn 8-week randomized controlled trial in 63 recreationally active men found that 500 mg/day of shilajit significantly blunted the strength loss caused by fatiguing exercise [3]. The high-dose group lost only 8.9% of maximal force after a fatigue protocol, compared to 16% in the placebo group. They also had lower serum hydroxyproline, a marker of connective tissue breakdown.\n\nA separate study examined shilajit's effects on gene expression in skeletal muscle [6]. After 8 weeks at 500 mg/day, researchers found significant upregulation of extracellular matrix genes: collagen types I, III, V, VI, and XIV increased 4.6- to 5.2-fold, and fibronectin increased 3.65-fold. These are the structural proteins that form the scaffold of muscle tissue, suggesting shilajit may actively support muscle repair and regeneration at the molecular level.\n\nCognitive Protection\n\nFulvic acid, shilajit's primary active constituent, has attracted attention for neurological applications. In vitro research demonstrated that fulvic acid blocks the self-aggregation of tau protein [4] — the process that forms neurofibrillary tangles in Alzheimer's disease. It also directly interacts with tau to reduce the length of already-formed aggregates.\n\nThis is mechanistically important because tau aggregation is one of two hallmarks of Alzheimer's (alongside amyloid plaques), and current pharmaceutical approaches targeting tau have largely failed in clinical trials. While fulvic acid's effects have been demonstrated only in cell cultures so far, the plausibility is high enough that researchers have proposed shilajit as a nutraceutical candidate for cognitive aging support.\n\nDosage and Quality Considerations\n\nMost human trials have used 250–500 mg/day of purified, standardized shilajit, often the commercially tested form called PrimaVie®, which is standardized to contain at least 50% fulvic acid. Raw or unpurified shilajit from unverified sources can contain heavy metals, fungal contamination, or inconsistent active compound levels — quality is critical.\n\nThe standard review of safety and efficacy [7] confirms that purified shilajit is well-tolerated with no significant adverse effects in the doses studied, and blood markers (liver enzymes, kidney function, blood glucose, lipids) remain unaffected across trials.\n\nShilajit is sometimes combined with ashwagandha or CoQ10 for broader adaptogenic and mitochondrial support. See our Ashwagandha page and CoQ10 page for more on those compounds.","deepText":"Evidence Review\n\nTestosterone and Fertility (Human RCTs)\n\nThe most robust human evidence for shilajit centers on androgen effects. Biswas et al. (2010) enrolled 35 men with oligospermia in an open-label trial using 100 mg processed shilajit twice daily for 90 days [1]. Of 28 completers, total sperm count rose by 61.4% (from a mean of ~13.8 to ~22.3 million/mL), total motility by 17.4% for fast progressive sperm, and normal sperm morphology by 18.9%. Total testosterone increased 23.5% (p < 0.001) and FSH rose 9.4% (p < 0.05), with no adverse changes in liver or kidney function markers. Limitations include lack of placebo control and small sample size.\n\nPandit et al. (2016) addressed the placebo control gap with a randomized, double-blind, placebo-controlled trial in 96 healthy men aged 45–55 [2]. At 250 mg twice daily for 90 days, the treatment group showed statistically significant increases in total testosterone (p < 0.05), free testosterone (p < 0.05), and DHEAS (p < 0.05) compared to placebo. Gonadotropins (LH, FSH) were unchanged, suggesting the mechanism is not through increased luteinizing hormone signaling but likely through enhanced testicular steroidogenesis or reduced metabolic conversion. This study provides the strongest evidence for shilajit's testosterone effects in the general male population.\n\nPhysical Performance (Human RCT)\n\nKeller et al. (2019) conducted an 8-week parallel-group RCT in 63 recreationally active men randomized to placebo, 250 mg/day, or 500 mg/day of PrimaVie® shilajit [3]. The primary outcome was maximal voluntary isometric contraction force before and after a fatiguing protocol. The 500 mg group showed significantly less post-fatigue strength decline: 8.9 ± 2.3% vs. 16.0 ± 2.4% in placebo (p = 0.044) and 17.0 ± 2.4% in the 250 mg group (p = 0.022). Serum hydroxyproline — a byproduct of collagen breakdown reflecting connective tissue stress — was also significantly lower in the 500 mg group: 1.5 ± 0.3 μg/mL vs. 2.4 ± 0.3 μg/mL in placebo (p = 0.024). The 250 mg dose did not differ from placebo on either measure, suggesting a dose-dependent effect.\n\nSkeletal Muscle Gene Expression (Human Clinical)\n\nDas et al. (2016) examined transcriptomic changes in skeletal muscle biopsies from overweight/obese adults given 250 mg PrimaVie® twice daily for 8 weeks [6]. RNA microarray analysis revealed upregulation of 17 extracellular matrix gene probe sets, including collagen types I, III, V, VI, and XIV at 4.61–5.18-fold increases, fibronectin 1 at 3.65-fold, fibrillin 1 at 3.05-fold, and decorin at 2.23-fold. These structural proteins support the mechanical integrity of muscle fibers and their attachment to connective tissue. No adverse changes in blood glucose, lipids, creatine kinase, or serum myoglobin were observed. The study was not powered to detect functional performance outcomes, so the mechanistic findings need to be linked to performance studies (such as Keller et al.) for clinical interpretation.\n\nMitochondrial and Fatigue Mechanisms (Animal)\n\nSurapaneni et al. (2012) modeled chronic fatigue syndrome in rats via 21 days of forced swimming, then treated with shilajit at 25, 50, and 100 mg/kg [5]. Shilajit reversed CFS-induced behavioral symptoms (immobility, anxiety), normalized plasma corticosterone and adrenal gland weight indicating HPA axis restoration, and preserved mitochondrial membrane potential and electron transport chain complex activities. Nitric oxide and lipid peroxidation markers were also reduced. The shilajit used was standardized to 0.43% DBPs, 20.45% DBP-chromoproteins, and 56.75% fulvic acids. These animal findings are mechanistically consistent with the human fatigue and performance data but cannot be directly extrapolated to humans.\n\nCognitive and Neuroprotective Effects (In Vitro and Review)\n\nCarrasco-Gallardo et al. (2012) reviewed the biological basis for shilajit's potential in cognitive aging [4]. Fulvic acid was shown to inhibit tau self-aggregation in vitro and to disaggregate pre-formed tau filaments — both key mechanisms in Alzheimer's pathology. The authors also cite fulvic acid's antioxidant capacity, its ability to reduce amyloid-beta aggregation, and its anti-inflammatory profile as supportive evidence. The study is a narrative review with in vitro data, not a clinical trial, and the translation from cell culture to human benefit requires further clinical investigation.\n\nSafety Profile\n\nStohs (2014) reviewed the available safety and efficacy data across animal and human studies [7]. Across multiple human trials, shilajit at doses of 100–500 mg/day showed no adverse effects on liver enzymes, kidney function, blood cell counts, blood glucose, or lipid panels. The review confirmed the primary active compounds as DBPs, fulvic acid, and their derivatives, and characterized the overall evidence as promising but in need of larger, longer-duration clinical trials.\n\nOverall Assessment\n\nThe human evidence for testosterone support is the strongest, with two controlled trials showing consistent effects. Physical performance evidence is supported by one solid RCT. Cognitive protection remains largely preclinical. The primary limitation across the literature is study size — most human trials involve fewer than 100 participants. Bioavailability is also rarely standardized across trials, making dose comparisons difficult. The safety profile is reassuring across all available data, and the compound's multi-target profile (hormonal, mitochondrial, structural, cognitive) is mechanistically coherent with its chemical composition.","deepTruncated":false,"references":[{"id":"1","title":"Clinical evaluation of spermatogenic activity of processed Shilajit in oligospermia","authors":"Biswas TK, Pandit S, Mondal S, Biswas SK, Jana U, Ghosh T, Tripathi PC, Debnath PK, Auddy RG, Auddy B","year":2010,"journal":"Andrologia","pmid":"20078516","url":"https://pubmed.ncbi.nlm.nih.gov/20078516/"},{"id":"2","title":"Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers","authors":"Pandit S, Biswas S, Jana U, De RK, Mukhopadhyay SC, Biswas TK","year":2016,"journal":"Andrologia","pmid":"26395129","url":"https://pubmed.ncbi.nlm.nih.gov/26395129/"},{"id":"3","title":"The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels","authors":"Keller JL, Housh TJ, Hill EC, Smith CM, Schmidt RJ, Johnson GO","year":2019,"journal":"Journal of the International Society of Sports Nutrition","pmid":"30728074","url":"https://pubmed.ncbi.nlm.nih.gov/30728074/"},{"id":"4","title":"Shilajit: a natural phytocomplex with potential procognitive activity","authors":"Carrasco-Gallardo C, Guzman L, Maccioni RB","year":2012,"journal":"International Journal of Alzheimer's Disease","pmid":"22482077","url":"https://pubmed.ncbi.nlm.nih.gov/22482077/"},{"id":"5","title":"Shilajit attenuates behavioral symptoms of chronic fatigue syndrome by modulating the hypothalamic-pituitary-adrenal axis and mitochondrial bioenergetics in rats","authors":"Surapaneni DK, Adapa SR, Preeti K, Teja GR, Veeraragavan M, Krishnamurthy S","year":2012,"journal":"Journal of Ethnopharmacology","pmid":"22771318","url":"https://pubmed.ncbi.nlm.nih.gov/22771318/"},{"id":"6","title":"The Human Skeletal Muscle Transcriptome in Response to Oral Shilajit Supplementation","authors":"Das A, Datta S, Rhea B, Sinha M, Veeraragavan M, Gordillo G, Roy S","year":2016,"journal":"Journal of Medicinal Food","pmid":"27414521","url":"https://pubmed.ncbi.nlm.nih.gov/27414521/"},{"id":"7","title":"Safety and efficacy of shilajit (mumie, moomiyo)","authors":"Stohs SJ","year":2014,"journal":"Phytotherapy Research","pmid":"23733436","url":"https://pubmed.ncbi.nlm.nih.gov/23733436/"}],"wordCount":1581,"source":{"path":"src/content/topics/shilajit/ancient-adaptogen.md"},"citeAs":"“Does shilajit raise testosterone or reduce exercise fatigue?.” What's Healthy and Why. https://whatshealthyandwhy.com/shilajit/ancient-adaptogen","notice":"General information backed by peer-reviewed research, not medical advice."}