Adherence
The unregulated online sale of sports supplements poses a significant public health risk due to the prevalence of adulterated products containing undeclared prohibited substances.
Be extremely cautious when buying supplements online. The market is poorly regulated, and products may contain undeclared drugs. Look for third-party testing seals or buy from reputable physical stores with known supply chains to avoid contamination.
Currently, the Internet is an emerging market that is gaining more strength in the sale of SS... AECOSAN warns that the sale of SS on the Internet is not always safe... Between 2012 and 2017, 70-90% of food supplements withdrawn from the market contained pharmacologically active substances not declared in the labels.
Why this rating
The claim is supported by citations of regulatory warnings and studies on adulterated products, though the primary study itself did not test product purity.
Source
Consumo de suplementos deportivos en levantadores de peso de nivel nacional (Sports supplements consumption in national-level powerlifters)
José María Puya-Braza et al. · Retos · 2018
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →