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Quick answer. Shilajit — a Himalayan mineral-rich resin high in fulvic acid — has been studied in multiple human trials. The purified, patented PrimaVie® form used in Himmense BOOST has been shown at 500 mg/day to raise total testosterone by ~20% and free testosterone by ~19% in men aged 45–55 over 90 days, and to boost DHEA-S by 31%. Separate trials show gains in sperm count, motility and morphology, plus muscle strength retention, collagen synthesis and bone healing. Fulvic acid provides antioxidant and anti-inflammatory benefits at the cellular level. Best taken daily as part of a wider testosterone-support stack.
In this guide
- What is shilajit?
- Testosterone support (clinical data)
- Fertility and sperm health
- Performance, muscle and recovery
- Bone healing and strength
- Antioxidant and anti-inflammatory effects
- Why we chose PrimaVie® Shilajit
- Where shilajit fits in Himmense BOOST
What is shilajit?
Shilajit is a powerful Himalayan resin used for centuries in Ayurvedic medicine to support male vitality, energy and longevity. Whether you're noticing lower energy, reduced strength, slower recovery, declining libido, or simply want to optimise performance and hormone health, you're not alone — and a natural, evidence-backed solution exists.
Shilajit (Asphaltum punjabianum) is a sticky, mineral-rich resin that seeps from rocks in the Himalayas and other high mountain ranges after centuries of plant matter decomposition. It's rich in fulvic acid (a potent antioxidant and anti-inflammatory compound) along with a broad spectrum of minerals and trace elements including calcium, magnesium, potassium, iron, zinc, selenium and chromium — plus amino acids and other bioactive compounds.
PrimaVie® is the gold-standard, purified, safety-tested form of shilajit — the one used in our BOOST formula. It's backed by several human clinical studies and works by supporting mitochondrial energy production and reducing oxidative stress.
Testosterone support
A 90-day randomised, double-blind, placebo-controlled study on 75 healthy men (aged 45–55) found that 500 mg/day of PrimaVie® Shilajit significantly increased total testosterone by +20% and free testosterone by +19%. The placebo group saw testosterone levels decline. DHEA-S (a precursor to testosterone) rose by 31%, while gonadotropic hormones (LH and FSH) remained stable.
In a separate 90-day study on 28 oligospermic infertile men, 200 mg/day of shilajit raised serum testosterone by 23.5%.
Fertility and sperm health
The same study on infertile men showed impressive improvements in sperm parameters after 90 days of 200 mg/day shilajit:
- +61.4% total sperm count
- +37.6% semen volume
- +18.9% normal sperm morphology
- Sperm motility improved by +12.4% to +17.4%
Performance, muscle and recovery
An 8-week randomised, double-blind, placebo-controlled trial with 63 recreationally active young men (mean age 21) showed that 500 mg/day PrimaVie® Shilajit significantly improved retention of maximal muscular strength after a fatiguing protocol, compared with placebo. The high-dose group also showed greater reductions in collagen breakdown.
A separate placebo-controlled study of 35 recreationally active young men (mean age 21) found that 8 weeks of PrimaVie® supplementation significantly increased serum pro-collagen type 1 alpha 1 (pro-C1α1), a key biomarker of type 1 collagen synthesis. The 500 mg/day group showed a +93.6% increase, and the 1,000 mg/day group a +164.9% increase from baseline — versus only +15.7% for placebo. That suggests support for joint health, muscle connective tissue and structural strength.
Additional research showed PrimaVie® Shilajit upregulated genes involved in muscle repair, regeneration and elasticity, with even stronger effects when combined with exercise.
Bone healing and strength
In a randomised, double-blind, placebo-controlled study of 160 patients with tibia fractures, 1,000 mg/day shilajit for 28 days significantly accelerated bone healing. Radiographic bone union occurred in 129 days in the shilajit group vs 153 days in the placebo group.
Antioxidant and anti-inflammatory effects
Shilajit contains fulvic acid, a powerful antioxidant and anti-inflammatory compound that helps protect cells from free-radical damage and oxidative stress. Regular use may therefore support healthy ageing, reduced inflammation and overall vitality.
These properties are well-documented in scientific reviews. A 2021 review of shilajit research highlighted its significant antioxidant, anti-inflammatory and immunomodulatory activities, largely attributed to fulvic acid and related humic compounds. That mechanism also helps explain shilajit's benefits for energy, testosterone support, muscle recovery and overall vitality — by combating oxidative stress at the cellular level.
Why we chose PrimaVie® Shilajit
PrimaVie® is the most researched and trusted form of shilajit available. It delivers consistent, high levels of fulvic acid and bioactive compounds while meeting strict safety standards. By supporting cellular energy and fighting oxidative stress, it helps men combat age-related testosterone decline and feel stronger, sharper and more energised.
Where shilajit fits in Himmense BOOST
Himmense BOOST combines PrimaVie® Shilajit with a full spectrum of synergistic ingredients — Tesnor®, KSM-66® Ashwagandha, Testofen® Fenugreek, ForsLean®, BioPerine®, magnesium, zinc and more — to support healthy testosterone levels, fertility, muscle recovery, joint health and daily vitality, naturally.
Further reading
- The complete 2026 UK guide to choosing a testosterone supplement
- How to boost testosterone naturally: 12 proven methods
- Signs of low testosterone in men
- Tesnor®: the clinical evidence
- Surprising benefits of ashwagandha
PrimaVie® is a registered trademark of Natreon, Inc. Advice is for information only and should not replace medical care. Consult a doctor or healthcare professional if you have any questions or are taking any other medications before you try any remedies or supplements.
