
Pre-Workout Supplements Tied to Severe Sleep Loss in Youth, Canadian Study Finds
A Canadian study of 16–30-year-olds found that past-year use of pre-workout supplements is linked to a higher likelihood of sleeping five hours or less per night. With high caffeine levels (90–350 mg per serving), these stimulants may disrupt sleep during a critical period of development; experts urge routine screening for supplement use, harm-reduction steps like avoiding these products 12–14 hours before bed, and tighter oversight of dietary supplements in Canada.












