Too much protein can cause Headache Tiredness Loss of appetite Bloating Thrist Increase bowl movement Nausea Cramp

Some of them have side effects not all of them

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When taken by mouth: Whey protein is LIKELY SAFE for most children and adults when taken appropriately. High doses can cause some side effects such as increased bowel movements, nausea, thirst, bloating, cramps, reduced appetite, tiredness (fatigue), and headache.

Well you can expect a long chain of aminoacids in your body

Ptotiens shake kehone mehan yaregihal