Whey protein is a byproduct of cheese manufacturing. Essentially, it is protein from cow's milk. It is frequently used as a
dietary supplement, especially by bodybuilders. It is also claimed to be helpful for numerous other uses, such as for weight control. Whey protein is also used to make many types of baby formula.
Whey protein contains a mixture of different compounds, depending on the purity of the whey protein. Some types are minimally processed and filtered, leaving some carbohydrates (including lactose) in with the protein. Other forms are highly filtered and refined, leaving just the protein.
There are numerous different proteins in whey protein, including some immunoglobulins (antibodies), which might help prevent infections or have other effects on the immune system. Whey protein also contains a compound that the body uses to make
glutathione, an important antioxidant that helps protect cells from damage due to a variety of different stresses. This activity might also provide some benefit for cancer prevention.
Some researchers think that whey protein might be beneficial for
heart disease, as some forms of this protein might work like a class of
blood pressure medications known as angiotensin-converting enzyme inhibitors (ACE inhibitors).
Lastly, there is some interest in using whey protein as part of a high-protein, low-carbohydrate weight loss diet.
Is Whey Protein Effective?
In general, there is not enough scientific evidence to suggest that whey protein really is effective for most uses. The protein might be useful for decreasing the risk of food
allergies (especially milk allergy) in high-risk infants and might help people who have
HIV or
AIDS to gain weight
(see Does Whey Protein Work? for more information).
There is no established standard dosage for whey protein, although general guidelines may be obtained from a few clinical studies that evaluated certain uses of the supplement.
Side Effects of Whey Protein
People sometimes assume that
dietary supplements are automatically free of side effects. However, this is usually not the case. In studies, there have been reported side effects of whey protein, including (but not limited to):
- Increased stool frequency
- Headaches
- Loss of appetite
- Fatigue
- Thirst.
(Click Whey Protein Side Effects to learn more, including potentially serious side effects that you should report immediately to your healthcare provider.)
A normal consumption of whey protein (though food) is safe for most people. Medicinal use also appears to be safe in many circumstances. Some people may be more likely to experience problems due to whey protein. Therefore, you should talk with your healthcare provider prior to taking it medicinally if you:
Make sure to tell your healthcare provider about any other medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.
What If I Take an Overdose?
It is not known what exactly to expect from an overdose of this supplement. If you think you or someone else may have taken too much, it is important to seek immediate medical attention.
Storage Methods for Whey Protein
Refer to the label of your individual product for information on how best to store whey protein supplements. Keep all medications and supplements out of the reach of children.
