Teen Protein Supplements: Rising Popularity and Health Concerns

A University of Michigan survey of roughly 1,000 parents found that just under half of teenagers aged 13 to 17 had consumed protein powders, shakes, bars or fortified snacks in the past year, with boys more likely to use them for sports performance and muscle building and girls more often for diet balancing or weight loss. Meanwhile, Statista data show that Germany's fitness protein market grew by about 25% in retail revenue from March 2024 to March 2025.

The German Nutrition Society (DGE) recommends 0.9 g of protein per kilogram of body weight for adolescents, yet studies indicate many German youths eat more than twice the advised amount, raising concerns about long-term kidney strain, early puberty and excess weight. Experts argue that a balanced diet—such as oat porridge with almond milk, potatoes with curd cheese, and whole-grain bread with peanut butter—can meet these needs without costly supplements.

They also caution that many protein products contain sweeteners, additives, and, in some cases, undisclosed doping substances, and may trigger acne or reduce intake of fiber and micronutrients. While protein can aid muscle recovery and satiety for highly active individuals, the DGE stresses that most teens can achieve adequate intake through plant-based foods and that supplements should be reserved for specific medical or appetite issues.