SARAH BERRY

WHO IS SARAH BERRY?

Sarah Berry is one of the most-cited nutrition researchers working today — Professor of Nutritional Sciences at King's College London and Chief Scientist at ZOE, where she leads the PREDICT studies into how the same meal produces 20-fold different glucose, lipid, and inflammatory responses across individuals. For cyclists chasing the last 2–3% of body composition, fixing mid-ride GI issues, or trying to make sense of why a sports nutrition plan that worked for a teammate doesn't work for them, her work is the most rigorous starting point.

KEY IDEAS

The major positions Berry is known for in cycling and endurance sport.

• →Individual blood glucose responses to identical meals vary up to 20-fold between people — generic nutrition guidelines underperform personalised approaches because the variation is genuinely enormous.
• →Ultra-processed food gets eaten ~50% faster, bypassing satiety signals — the mechanism is consumption speed, not just composition, producing ~500 extra calories/day at the population level.
• →Eat fibre, fat or protein BEFORE carbohydrate at a meal — same food, lower glucose peak. Slows gastric emptying. The food order is a free intervention.
• →Sleep deprivation worsens metabolic response to identical food — the same breakfast after a bad night produces a higher glucose peak. Sleep is a direct nutritional strategy.
• →Evening snacking after 9pm is structurally bad — circadian disruption plus worse food choices. The same calories earlier in the day land differently.