Does collagen powder break a fast?

Q: Does collagen powder break a fast?

No - breaks a clean fast. Breaks a fast. Protein is not a fasting-safe add-in, even if the drink still looks like black coffee. Put collagen in the eating window and log it like any other protein supplement.

/ 100

Breaks a fast

35-80 kcal

No - breaks a clean fasthigh confidenceNutrition-label evidence

Decision

No - breaks a clean fast. Collagen is protein. It adds calories and amino acids, especially when mixed into coffee.

Reason

Protein is not a fasting-safe add-in, even if the drink still looks like black coffee.

Evidence

Collagen peptide labels commonly list calories and protein per scoop.

How we calculate this value

Base tier: 25/100 for "Breaks a fast". Item adjustment: -7 points for calories, nutrient signal, product variability, and safety caution. Final Fast Score: 18/100.

What to do

Put collagen in the eating window and log it like any other protein supplement.

References for this answer

Methodology

USDA Agricultural Research Service: FoodData Central U.S. Food and Drug Administration: Added Sugars on the Nutrition Facts Label