What should I know about Stress Ernährung?

The link between stress and nutrition is multifaceted, involving genetics, lifestyle, and the microbiome. Some genetic variants, such as MTHFR C677T (rs1801133), can modestly affect homocysteine levels, which may rise under chronic stress—but this is a statistical association, not a proven causal pathway. Evidence is primarily observational (GWAS), not from RCTs. Other variants, like CRY1, can shift circadian rhythms and stress hormone release, but effects are small and mechanistic. Consumer DNA tests like MyBody-X can provide insights but not diagnoses. For a personalized stress-nutrition approach, blood biomarkers (homocysteine, B12, vitamin D, cortisol) and a food diary are often more actionable. The evidence for genotype-based dietary advice is moderate to weak overall. Safety note: supplements (e.g., B vitamins) should only be taken after medical assessment, as high doses can be harmful.