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.
Beta-alanine is a very popular non-essential amino acid found in many pre-workout supplements. It's associated with decreased fatigue and potentially, increased performance in several activities. Let's take a look at some research on this supplement's safety.