If It Fits Your Macros—flexible dieting approach tracking protein/carbs/fats without food restrictions, popularized by bodybuilders.
Overview
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IIFYM
Instagram 2005-01 diet active
Updated 2026-02-17
Pre-Twitter era Notable 3 million+ lifetime posts
First documented in January 2005 on Instagram. Currently active and in regular use across social platforms since 2005.
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