Protein makes up a significant amount of your body. According to
PowerSupplements.com, water is the only substance more present in your
system. Protein is necessary to build and rebuild muscle mass, repair
damaged tissue, and it keeps the body healthy and defends it against
diseases. Although they are both sources of protein, nutritionists,
athletes, vegetarians and fitness gurus often debate soy protein vs.
whey protein for weight loss.

Benefits

Soy protein and whey protein both reduce calorie intake, decrease food
cravings and raise energy levels. Both proteins are gluten and
cholesterol free and safe for those who are lactose intolerant. Soy
and whey protein are beneficial in weight loss when added to a
balanced, low-calorie diet. The average adult needs to consume .75
grams of protein for every kilogram of body weight, which makes each
person's daily requirements different.

Differences

Whey and soy are different in that whey comes from milk and soy comes
from a plant. According to the Whey Protein Institute, whey is a more
nutritionally complete protein because it contains bioactive
ingredients that foster the immune system. Whey also consists of
branched chain amino acids. Soy protein does not absorb as quickly as
whey protein, causing it to be slower at repairing muscle tissue after
a workout. However, soy protein is less expensive and may be better
for women's weight control.

Considerations

In the article, "Soy Protein diet shakes are best for women trying to
lose weight," it suggests that soy benefits women's health and weight
loss. Because soy contains lecthin, the article says this protein
shake will help reduce cellulite in women. Phytoestrogen found in soy
improves texture and strength of skin, nails and hair. Soy controls
overproduction of insulin. Overproduction of insulin contributes to
the over-storage of sugar, which turns to fat in the body. Soy is also
helpful in controlling weight in women during menopause.

Research

A 12-week study, published on PubMed Central, was conducted on two
groups of individuals to test the effectiveness of whey protein on
weight loss. Both groups reduced their diets by 500 calories, but one
group incorporated whey protein into its diet. At the end of the
study, both groups lost similar amounts of weight. However, those who
took whey protein had less body fat and better preservation of muscle
mass.

Warning

Soy protein may be harmful to people with thyroid problems, says
Thyroid-Info.com. Soy can negatively effect someone who currently has
a thyroid issue, and it can cause thyroid problems in healthy
individuals when taken in large quantities. Whey protein can cause
liver damage when taken in large quantities. It is important to
proportion your soy or whey protein intake to your weight. Check
labels on protein shakes and supplements so as not to exceed the
recommended dosage.

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