Celsius caffeine vs Red Bull: which energy drink is really better for your body?
Susan Carter, MD: Endocrinologist & Longevity expert
Nov 23, 2025 · 14 min read
Celsius and Red Bull both promise fast energy, but their caffeine, sugar, and ingredient profiles hit your heart, brain, and gut very differently. Here is how to compare them safely and choose what actually fits your health. “Energy drinks are not automatically ‘bad,’ but they are concentrated caffeine delivery systems layered with sugar and stimulants. […]