Whey & Soy Protein Powder: Risks, Allergies & Potential Side Effects

Athletes and bodybuilders commonly use protein powder supplements to help them lose weight and build muscle. Unfortunately, there are certain dangers associated with the use of whey protein and soy protein powders.

Allergic Reactions

• The whey used in whey protein powders is derived from milk. Occasionally, whey protein powders may cause an allergic reaction in people with lactose intolerance or dairy allergies.

Kidney Stones

• The protein and calcium found in whey protein powder can form small crystals or deposits that linger in the kidneys. These kidney stones are often the result of consuming too much protein powder and not enough water.

Thyroid Problems

• The soy in soy protein powders has been known to decrease the functioning of the thyroid. As a result, the body's metabolism lowers and weight gain commonly occurs.

Increased Estrogen

• Soy has been known to increase the levels of estrogen and other hormones in the body. As a result, researchers speculate that consuming soy protein powders increases your risk for certain cancers, such as breast cancer and ovarian cancer.

Mineral Absorption

• Soy protein powders can hinder the body's ability to absorb certain minerals and nutrients. However, this interference is usually so minimal that it causes no serious complications.