Myths vs facts: CLOCK and Abnehmen

The CLOCK gene is a core component of the circadian clock. A common myth is that a specific CLOCK variant determines whether you can lose weight easily. Fact: GWAS studies have linked some CLOCK SNPs (e.g., rs1801260) to BMI or weight loss, but effect sizes are tiny, replication is inconsistent, and the explained variance is minimal. Circadian rhythms do influence hormones like melatonin, cortisol, and ghrelin, which can indirectly affect eating behavior and metabolism. However, the impact is dwarfed by total energy balance, sleep quality, and physical activity. Consumer DNA tests that claim to offer personalized 'CLOCK diets' greatly overstate the evidence. No randomized controlled trials support such interventions. For weight loss, focus on proven lifestyle measures rather than single-gene interpretations. Safety note: Do not change diet or supplements based solely on a genetic test. Evidence grade: unclear.