Which preworkout supplement ingredients work best?

Since the early days of N.O. Xplode and Jack3d, the preworkout market has boomed. The Supplement Database now contains over 1,000 preworkouts, making it the most populous product category. Are these supplements effective in doing anything? The answer depends on its ingredients. In this article, we’ll briefly look at the research behind the three most popular ingredients found in preworkouts: caffeine…