What physiological factors complicate the effectiveness of IIFYM?
IIFYM assumes that weight fluctuations are solely due to changes in fat mass, but this is misleading. Many individuals experience weight changes due to water retention from food intolerances or allergies, which can mask actual fat loss. Even if a person maintains a caloric deficit, they may see no changes on the scale if inflammatory foods remain in their diet.
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This is one answer. The complete system — the psychology, the biology, and the method — is in the book.
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