Only Two of 20 Diet Shakes Rated Good in Stiftung Warentest Review
Tests found contaminants across products, with labeling defects widespread.
Overview
- Independent testing of 20 vanilla meal‑replacement powders identified elevated chlorate, aluminium or cadmium in several products.
- One powder, Slim Choco by Trinkkost, exceeded enterobacterial limits and received the lowest grade of “mangelhaft.”
- Optifast by Nestlé and a Layenberger shake earned overall “good” ratings for meeting nutrient and quality criteria.
- About half of the products fell short on legally required labeling, including misleading meal‑replacement claims and unclear aroma declarations.
- Prices ranged from €0.67 to €2.87 per portion, and most shakes relied on non‑caloric sweeteners whose calorie‑saving benefits are reported to outweigh debated risks.