Whey is one of the purest protein sources available, creating whey protein powder among the most favored and widely used nutritional fitness supplements. But exist also whey protein powder side effects that make this pre workout supplement caffeine potentially risky to use?
Do a search on this topic. You will find a lot of articles, along with authority sites as WebMD or Mayo Clinic, displaying a number of whey side effects.

I consume whey protein powder shakes & smoothies, along with making it a formula ingredient, many times daily - as someone who does weight lifting and strength training 4 5 times per week, eating high protein is a crucial part of my eating habits.
So, I'm concerned about possible side effects which might be more of an issue to my health, than a benefit to my workouts.
Upon further analysis, I realize that there may be digestion related side effects from whey, along with health problems by eating a lot of protein. Though I don't see unwanted effects that are unique to whey protein powder. Unless, of course, what you're using is inferior, with nutritionally bad ingredients in it.

What's Whey Protein And Its Important Properties
Let us look at whey a lot more closely: specifically the reason it's so common, along with the main issues with using it.
Have you noticed the nursery rhyme about the little bodybuilder, lifting weights and eating their' curds as well as whey' to get stronger and bigger? Well, if you add an unique enzyme [it's known as rennin] to milk, you are going to cause it to curdle. This's precisely how you make cheese - the curds are the cheese, and the remaining liquid is whey.