Born from leaves and twigs of the yerba mate plant, this South American weight-loss tea is rife with stimulating chemicals like caffeine, theophylline, and theobromine. In a study in animals that ate a high-fat diet, those that consumed yerba mate had lower blood sugar levels and didn’t gain as much weight as those that didn’t consume the drink. Plus, obese people taking an yerba mate supplement for 12 weeks lost more fat compared to a placebo group, in a 2015 study in the journal BMC Complementary and Alternative Medicine. Yerba mate is considered a substitute for coffee—without the bitterness—so try it in place of your morning Joe tomorrow. (Consider these fat-releasing habits to help you slim down.)
Green tea is kind of trendy these days largely because of the many health benefits that it provides. Among them is green tea’s role as a natural appetite suppressant. “Green tea extract affects two important peptide hormones, norepinephrine and dopamine, which activate the sympathetic nervous system,” Dr. Axe says. “Together, these two hormones are called catecholamines and are well known for their ability to suppress appetite.” In particular, green tea contains a powerful compound called epigallocatechin gallate (EGCG) that is thought to prevent the breakdown of catecholamines, leading to a reduction in appetite, he explains.
Studies on white tea in weight loss are less prominent than green tea studies. However, there is research to show it is effective in maintaining a healthy weight. One such study was conducted in vitro in Germany in 2009. Researchers focused on antioxidants in white tea that can aid in weight loss. Specifically, the antioxidant EGCG was found to inhibit the production of fat cells. That means drinking white tea can help prevent weight gain to begin with.
Protein is known for suppressing appetite, but it seems that whey protein is especially good at it. New research shows that after people have a liquid meal with whey protein they consume significantly fewer calories at their next meal than those who had a liquid meal with casein protein. Stock up on whey protein at your local natural foods store to reap this benefit!

When it comes to appetite, we have three separate studies all showing benefits of 5-HTP supplementation in obese and prediabetic patients (people who were experiencing early symptoms of diabetes). It should be noted that these studies were all conducted by the same research group, although one other study did note some benefit in women who were just overweight.
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