Taking supplements to increase energy or performance can be beneficial, but there are other times when you should avoid them. If you’re working out regularly and feeling great, it may not be necessary. Plus, what works for one person might not work for another so it’s important to find a supplement that fits your specific needs. There are several different types of pills and powders with different ingredients designed to help individuals perform better during exercise or improve their overall health. In general, the most popular ones include creatine , beta-alanine , L-carnitine , caffeine , B vitamins (such as B12), calcium/magnesium citrate powder and others depending on the purpose of taking the supplement in question. For those looking to improve body composition: protein powder(for example whey) and carb blockers such as a low glycemic index diet.