The Supplement Database is an ever-growing resource providing objective information to allow you to decide on which product best fits your needs.
The conclusion on these three ingredients falls in line with what we've previously found; there is very little evidence backing up their claim of increasing testosterone levels for the vast majority of people.
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 beta-alanine...
Tribulus terrestris, magnesium, and ashwagandha extract probably have a limited ability to increase testosterone levels in young, healthy, and trained individuals.
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.
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 men...
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.
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.
Theoretically, beta-alanine should improve performance in several activities, especially high intensity or longer duration ones. Let's take a look at what the research says!
During exercise, increased pH can cause fatigue and hamper performance. Resistance training relies on the anaerobic energy system. This system causes increased pH levels after extended training. Beta-alanine increases muscle carnosine content and improves performance in certain activities.