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What are the side effects of Whey Protein Powder?

Side effects from whey protein powder are rarely experienced if used correctly. However, low quality whey concentrates do contain lactose, which can cause some digestive side effects like discomfort, bloating, gas and diarrhea if you are lactose intolerant. If you suffer from lactose intolerance you should ensure you use a whey isolate which is free of lactose content or an alternative protein source. If you are allergic to dairy products you should also use an alternative to whey protein.

All other side effects from whey protein generally relate to its over use. The intake of excessive protein can cause side effects like nausea, dehydration, constipation, cramps, reduced appetite, fatigue and headaches. Some preexisting disorders can also react to high protein intake. These include kidney and liver disorders.

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