It's always very important that before you go off adding any type of new supplement to your regular diet that you do your research on whatever it is that you are considering. It doesn't matter if it claims to be the safest thing in the world, it does not mean there aren't side affects and you should be away of them. That is no different with whey protein. If you are planning to add this to your diet to help you to build more muscle, you need to know that there are side affects.
Number one thing you should know about whey protein and that it is not good for those who are lactose intolerant. If you are wanting to use this protein you will need to make sure that you get whey protein isolate and not just whey protein. This is because the isolate will contain less than 1% lactose, which is the sugar in milk. Regular whey has about 6%, which may not be too much for some but if used in large doses it could bother someone who is lactose intolerant.
Another important thing to note is that no matter what kind of protein that you are considering adding to your diet it is not good for your body to absorb an over abundance of it. If you have too much protein in your body your kidneys will not be able to hand it and there are two things that could happen if your kidneys are unable to process too much protein.
1. Too much protein and the inability for your kidneys to process it can cause your blood to become acidic. Your blood should never be above the 7.0 range on the pH scale. So, when this happens your body tries to correct this by releasing calcium into the blood so the calcium can pick up the byproducts of the protein in your blood turning the blood pH back to neutral where it should be. This all sounds fine and dandy until you realize that you now a bunch of little pieces of calcium floating around in your blood that needs to be gotten rid of. And where does that go? Right back to the kidneys and suddenly you have, you guessed it, kidney stones.
2. The other thing that can happen if you have too much whey protein is that you can go into what is called ketosis. No matter what you have heard about ketosis, know this, it is really bad on your kidneys. Your body will burn off fat to use as energy but you end up starving your body for the carbohydrates it needs. People also cause more problems when they add protein shakes to the mix and cause the body to become confused and doesn't know what to do anymore. Your body will begin to get confused about whether to take care of carbs or fats.
Just remember that it is simply very important for you to check with your doctor and do research before you add any kind of supplements to your diet. It's always better to be safe than sorry.