Holyfat

Most endurance progress is built in Zone 2.
That’s exactly what BSE was designed for.
Real food. Long sessions. Metabolic efficiency.
Discover our new article and start 2026 on the right foundation.

Endurance doesn’t start on race day. Real food, for long hours on the bike or running on frozen trails.Taken before or during your effort, BSE helps you fully benefit from the metabolic adaptations of this type of training, without getting in the way of the work.