Is CLOCK useful for Blutzucker?

CLOCK (Circadian Locomotor Output Cycles Kaput) is a core circadian rhythm gene that influences glucose metabolism. Certain variants (e.g., rs1801260) have been associated with elevated fasting glucose, insulin resistance, and increased type 2 diabetes risk in GWAS and candidate gene studies. However, effect sizes are small, ancestry-dependent, and not clinically actionable on their own. Evidence is human-moderate. Consumer DNA tests may report CLOCK variants, but lifestyle factors (sleep timing, light exposure, meal timing) have a much stronger impact on blood sugar. No specific diet or supplement is justified based solely on a CLOCK SNP. Be cautious of marketing claims that overstate single-gene effects.