preworkout

Which preworkout supplement ingredients work best?

There is a good reason caffeine and beta-alanine are the two most popular ingredients found in preworkout supplements. There is plenty of research on both ingredients, and the research is overwhelmingly positive on their ability to improve workout performance. The same is not true for tyrosine. Verdict: caffeine and...

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whey protein safety

Is whey protein safe?

Whey protein is safe for the vast majority of people. The FDA accepts whey protein as a safe food based on both evidence and its ubiquitous use. The evidence does not suggest whey protein decreases bone mass or leads to kidney issues, at least in healthy populations.

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whey protein build muscle

Does whey protein build muscle?

Whey protein is one of the most favorably studied supplements on the market. Unlike other supplement ingredients, it consistently shows benefits for a wide variety of claims, including its ability to build muscle when combined with resistance training. The studies here include subjects of both genders ranging from, young...

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increase testosterone

Are there any supplements that increase testosterone?

Young, healthy males on a balanced diet, will probably not see any meaningful benefits in using testosterone boosters containing zinc, tongkat ali, or fenugreek. Older males or males who have low testosterone levels may see some improvement when using these products.

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similarity-index

Introducing: Supplement Product Similarity Index

The Similarity Index is a tool that allows you to see the relationship between products. It can help you find similar products. If you find an expensive pre-workout, this tool can show you if other products share its ingredient profile, possibly saving you cash.

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