An early, imprecise ancestor of THE FAD's whole reason for existing.
The Zone diet, developed by biochemist Barry Sears in the 1990s, is one of the original diets to explicitly invoke inflammation as its rationale — the theory centres on keeping insulin stable and modulating eicosanoids (signalling compounds derived from dietary fat) toward a less inflammatory balance.
| Dimension | Zone Diet | THE FAD |
|---|---|---|
| Core rule | Every meal balanced at roughly 40% carbohydrate, 30% protein, 30% fat | No macro ratio required — food quality and pattern matter more than precise proportions |
| Rationale | Aims to control insulin and a class of hormone-like compounds called eicosanoids, which influence inflammation | Targets inflammatory load more directly and broadly, not via a single macro ratio mechanism |
| Practicality | Requires measuring and balancing macros at every meal — a real time and attention cost | No measuring required — logs what you actually ate, however precisely or loosely |
The Zone diet deserves credit for putting "diet affects inflammation, not just weight" into mainstream conversation decades before it became a wellness buzzword — the specific 40-30-30 mechanism it proposes has less rigorous modern support than some of its contemporaries, but the underlying instinct was ahead of its time.
Precisely balancing every meal to a ratio is a real barrier to consistency for most people. THE FAD aims at the same broad goal — less inflammatory load — through food quality signals that don't require a kitchen scale.
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