Evidence Base

The studies behind every answer.

Original papers. Full analysis. Every finding linked to its DOI so you can check our work.

The Post-Workout Shake Ritual That Was Optional All Along A meta-analysis of 23 studies found that the entire timing effect vanished once researchers controlled for a single variable. The lead author's response to his own findings surprised everyone. Schoenfeld et al. · 2013 · Journal of the International Society of Sports Nutrition · n=525

Same protein, different containers — one split built 25% more muscle Researchers tested the same people on two meal splits with identical total protein. The way they divided it changed their muscle building by a quarter — and the meal that mattered most was the one they gave least thought to. Mamerow et al. · 2014 · The Journal of Nutrition · n=8

Their Testosterone Crashed 21%. Their Muscle Didn't Care. Researchers put 34 experienced lifters on 16:8 for eight weeks with matched calories and protein. The DXA scans told a story that rewrites what the fitness internet believes about fasting, hormones, and muscle. Moro et al. · 2016 · Journal of Translational Medicine · n=34

Three biological systems responded when they ate the same food later Harvard researchers fed 16 adults identical meals on two different schedules. The late schedule triggered a triple hit — doubled hunger, reduced calorie burn, and shifted fat cell gene expression — that no other study has captured simultaneously. Vujović et al. · 2022 · Cell Metabolism · n=16

Your 5:45 Alarm Bought Nothing but Lost Sleep Researchers matched 20 women on every variable — calories, protein, treadmill sessions — and changed only one thing: whether they ate before or after exercise. The gap in fat loss was statistically indistinguishable from zero. Schoenfeld et al. · 2014 · Journal of the International Society of Sports Nutrition · n=20

The Breakfast Advice Your Parents Got Was Planted by Two Food Companies Seven controlled experiments tested the most inherited piece of nutrition advice in the world. The group told to eat breakfast gained more weight than the group told to skip it. Bonnet et al. · 2020 · Obesity (Silver Spring) · n=425

You Spent 17 Hours Last Year on Advice From the 1960s Researchers pooled every controlled experiment on eating six meals a day for metabolism. The result across nine health markers was the same: nothing happened. Blazey et al. · 2023 · International Journal of Behavioral Nutrition and Physical Activity · n=279

Studies

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