Answers

Common questions, answered from the studies we have published and cited — with the strength of the evidence stated plainly, including when it is weak.

• Does creatine cause hair loss?6 cited studies
• How much protein do I need a day?6 cited studies
• Is creatine worth taking?6 cited studies
• Does cold water immersion blunt muscle growth?6 cited studies
• Is sauna good for your heart?4 cited studies
• Does caffeine improve training performance?6 cited studies
• Is intermittent fasting better for fat loss?6 cited studies
• Do you need protein straight after training?6 cited studies
• Does vitamin D actually do anything?2 cited studies
• Is zone 2 cardio worth the time?6 cited studies
• Does sleep affect muscle growth?6 cited studies

Looking for something else? Ask it on /ask and we will show you what our evidence says.