The sports supplement market is highly competitive and constantly changing. While creatine and whey protein remain constants, new substances are regularly emerging that promise athletes the decisive advantage.
Since this year, the focus has been on a natural substance that has been used in Ayurvedic medicine for thousands of years: Shilajit. The term is particularly popular in fitness studios and among strength athletes. The dark, tar-like substance from the mountains of Central Asia is experiencing a remarkable surge in popularity. But what is behind this trend and is the enthusiasm scientifically justified?
What exactly is Shilajit?
Shilajit, often referred to as mumijo or “blood of the mountains”, is a biomass found in rock crevices, predominantly in the Himalayas, Altai and Caucasus. It is formed over centuries by the slow decomposition of plant material, which is transformed by microorganisms and compressed by the pressure of the rock layers. The result is a sticky resin that can range in color from yellow-brown to jet black.
The main active ingredient that is considered to have the most health benefits is fulvic acid. It acts as a carrier that is intended to transport minerals and nutrients more efficiently into the body’s cells. Shilajit also contains over 80 different minerals and trace elements in ionic form, including iron, selenium, zinc and magnesium, as well as dibenzo-α-pyrones, which are considered to be powerful antioxidants in this article from Nordic Oil can read.
The siren call of testosterone
The main reason for its growing popularity in 2025, particularly among male athletes, is due to its suspected effects on hormonal balance. The fitness industry is driven by the search for legal ways to optimize muscle building (hypertrophy) and regeneration. This is where testosterone comes into play. This hormone is the primary driver of increasing muscle mass and strength.
Some clinical studies, although often with small numbers of participants, suggest that regular consumption of purified shilajit may have a positive effect on testosterone levels. This is a tempting prospect for athletes: optimized hormone levels could not only support muscle building, but also improve motivation and general energy levels.
Energy, endurance and regeneration
However, the effect of Shilajit is not only limited to the hormonal balance. Sports scientists are increasingly investigating the substance with regard to cellular energy production. There is evidence that shilajit can support the function of mitochondria, the “powerhouses” of cells. By improving ATP synthesis (adenosine triphosphate) – the body’s universal energy currency – Shilajit could help chronic fatigue to reduce and increase physical endurance.
In addition, the fulvic acid and minerals it contains play a role in combating oxidative stress. Intense exercise creates free radicals, which lead to muscle damage and inflammation. Shilajit’s antioxidant properties could help limit this damage and shorten recovery periods after hard workouts. This aspect also makes it interesting for endurance athletes who rely on rapid regeneration.
Between hype and heavy metal
Despite the promising reports and initial study results, caution is advised regarding this trend. The hype around Shilajit has led to a confusing market in 2025. Since it is a natural product that filters minerals from the rock, there is a serious risk with uncleaned or poorly processed products. Shilajit can contain high concentrations of heavy metals such as lead, arsenic or mercury if it comes from contaminated sources.
The scientific data is also not yet robust enough to classify Shilajit as an established sports supplement. Many mechanisms are not yet fully understood and long-term safety studies at high doses in the sports context are still pending. Athletes who want to try Shilajit must therefore place utmost importance on the quality and purity of the product. Certificates from independent laboratories that test for heavy metals and purity are a must. The “black gold” remains an exciting but complex candidate in the arsenal of natural performance enhancers.