Usually, a supplement is pure if it’s been certified and tested to not have anything interfering in the quality of the supplement. No additives, nothing put into the supplement that would cause it to have an effect that’s not intended. That would be what a ‘pure’ supplement would be.
You’ll find that in the SARM industry, many supplements are not actually pure. This is because there’s a lot of money to be made by adding in fillers and additives to various different kind of supplements: from weight gainers to protein powder and all kinds of others.
You should do your research and make sure a supplement is pure before you purchase it and begin using it.
