– Bulletproof 360, Inc. ("Bulletproof") of Bellevue, Washington is recalling five Collagen Protein Bar and Bite products because they have the potential to be contaminated with Listeria ...

The collagen-enriched protein bars are already on the market. The researchers are now running a larger trial to learn more about mechanisms of action, particularly in relation to the gut microbiota.

Participants who consumed the collagen-rich bars experienced impressive results. They lost twice as much weight—approximately 6.6 pounds compared to the control group’s 3.3 pounds.

The test group (32 people) received a protein bar to eat in addition to their meals twice per day. The 90-calorie protein bars had 10 grams of bovine-based collagen.

Bulletproof coffee, protein bars, and collagen protein are Keto-friendly and provide sustained energy without the sugary crash. Sponsored by Parker's Plate. Author: Dawn Boughton, New Day ...

Research being presented at this year's European Congress on Obesity (ECO 2025) and published in the journal Nutrients indicates that collagen could be a safe and effective weight-loss supplement.

“I [add] collagen protein powder,” she explains. “Sometimes I put vanilla bean. I love it.” So it seems that you can have your Bulletproof energy and a beauty boost, too.

Bulletproof sells a collagen protein supplement ($39.95) that can be stirred into coffee, tea, soups, stews, smoothies, or plain old water.

The collagen-enriched protein bars are already on the market. The researchers are now running a larger trial to learn more about mechanisms of action, particularly in relation to the gut microbiota.