FTO: Obesity Risk

rs9939609 · Metabolic Health

The FTO gene is the most significant common genetic contributor to obesity risk, affecting appetite regulation and fat storage.

What This SNP Does

FTO (fat mass and obesity-associated protein) influences ghrelin signaling and appetite regulation. Each risk allele (A) is associated with ~1.5 kg higher body weight and a 1.2x increased obesity risk. However, this is a risk modifier, not a deterministic factor — lifestyle strongly modulates the genetic effect. Studies show that physical activity can reduce the FTO risk by up to 27%.

Genotype Meanings

Genotype	Status	What It Means
TT	Low risk	No increased obesity risk from this variant.
AT	Moderate risk	~1.5 kg higher average weight. 1.2x obesity risk. Responds well to exercise intervention.
AA	Higher risk	~3 kg higher average weight. 1.7x obesity risk. Exercise reduces risk by up to 27%.

What You Can Do

A allele carriers benefit significantly from regular physical activity — studies show exercise can nearly eliminate the genetic risk. Mindful eating and protein-rich meals help with the appetite dysregulation associated with this variant.

This information is for educational purposes only and is not medical advice. Always consult a qualified healthcare provider before making health decisions based on genetic data. Genome Decoder does not diagnose, treat, or prevent any disease.