The latest research says whey protein is a better choice if you want to shed fat, pack on muscle, and boost testosterone. If you want a plant-based alternative, soy protein isn’t necessarily a bad choice. In fact, the FDA states that it’s better for your heart health than whey.

What is the difference between soy protein isolate and whey protein isolate?

The primary difference between the two is what they are made of. “Whey is animal-based protein, and soy is a plant-based protein, so if someone has a milk allergy or is vegan, they are limited to soy,” Collingwood says. Also, in terms of texture, it can be “a little more coarse and not quite as creamy as whey protein.”

Why soy protein isolate is bad for you?

“Once soy protein isolate is extracted from food, it may promote cancer and cancer growth,” Levin says, citing a study in Nutrition and Cancer that recommended men with early-stage prostate cancer “not to exceed dietary protein recommendations.” Others, however, say otherwise.

What is wrong with soy isolate?

Soy isolate protein contains unhealthy additives “Think of bathing in toxic bath oil,” Slayton says. “Even once you dry yourself off, some residue remains. Want to eat that residue?” The spray drying method used for soy can also form nitrites, compounds that can form carcinogens in the body, she explains.

Is soy protein isolate good?

You can use soy protein to help you lose weight, boost energy, or build muscle. Soy protein isolate may also manage your hormone balance and lower your risk of breast cancer, heart disease, and osteoporosis. Protein is important for your overall health and boosts development. Soy protein is 90% protein.

Is soy protein isolate good for bodybuilding?

Soy protein is a complete source of protein. It may aid muscle building but not as well as whey protein. Overall, soy is safe for most people and may offer health benefits, including weight loss. If you like the taste or eat plant-based, go ahead and give soy protein a try.

Is soy protein bad for testosterone?

Some research shows that regularly eating soy products like edamame, tofu, soy milk, and miso may cause a drop in testosterone levels. For example, one study in 35 men found that drinking soy protein isolate for 54 days resulted in decreased testosterone levels ( 3 ).

What are the side effects of soy protein isolate?

Consuming soy foods such as soy protein is SAFE. Taking soy dietary supplements also seems to be safe for most people when used short-term (up to six months). Soy can cause some mild side effects such as constipation, bloating, and nausea. It can also cause allergic reactions involving rash and itching in some people.

Does whey protein isolate make you gain weight?

Whey protein alone can’t make you gain weight. But it can provide your body the extra protein it needs if you’re trying to gain more muscle mass. Weight gain requires an increase in calorie intake. Changing your weight requires adjusting the number of calories you eat, not just adding whey protein to your daily diet.

Is soy protein isolate bad for your health?

In animal studies, soy isolate has been linked to allergies, thyroid problems, and even brain damage. Soy has been labeled one of the top seven allergens for people to avoid, as soy isolate is found in a lot of processed foods, including bread and baked goods, soups and sauces, and breakfast cereals and protein bars.

Is whey protein isolate or concentrate better for weight loss?

Taking whey protein is a great way to increase your protein intake, which should have major benefits for weight loss. Studies have shown that replacing other sources of calories with whey protein, combined with weight lifting, can cause weight loss of about 8 pounds (3.5 kg) while increasing lean muscle mass ().