Adult milk tolerance is controlled by a regulatory variant (rs4988235) in the MCM6 gene that keeps the LCT lactase enzyme switched on. About two-thirds of adults worldwide are lactase non-persistent — a normal trait, not a disorder. Learn what your genetics reveal about dairy digestion.

Thirst and hydration are partly genetic: AVPR2, AQP2, and AGT variants shape how your body senses dehydration and how much water your kidneys conserve. This article breaks down the vasopressin, aquaporin, and sodium-balance pathways behind individual fluid needs and how genetic insight can guide smarter habits.

Alcohol sensitivity is driven mainly by two genes: ADH1B (rs1229984) speeds acetaldehyde production, and ALDH2 (rs671) slows its clearance, causing the alcohol flush reaction in 30-50% of East Asian people. This article explains the two-step metabolism, the key variants, and why sensitivity differs from tolerance.

GLP-1 is an incretin hormone that controls blood sugar by boosting insulin, suppressing glucagon, and reducing appetite — the pathway behind Semaglutide and Tirzepatide. This article explains the mechanism, the evidence, and the genes (GIPR, TCF7L2, FTO) that shape your baseline GLP-1 biology.

Lysine is an essential amino acid that supports protein, collagen, and carnitine-driven energy. Learn how high lysine affects health, how genes like AASS and SLC7A9 shape metabolism and absorption, and how to optimize intake with pathway-level genetic insight and provider guidance.

C. difficile infection develops when antibiotics disrupt the protective gut microbiome. Learn how host genes like IL8 (CXCL8) and TLR4 may influence infection severity and recurrence, why antibiotic stewardship drives prevention, and how pathway-level genetic insight adds educational context for conversations with your provider.

TAS2R38 is the primary gene behind bitter-taste perception, and its variants (rs713598, rs1726866, rs10246939) sort people into tasters, non-tasters, and supertasters. This article explains why the same broccoli tastes mild to one person and harsh to another, and how taste genetics shapes diet and food choices.

The HNMT gene controls how fast the brain clears histamine, a neurotransmitter tied to attention and arousal. The Thr105Ile (rs11558538) variant lowers enzyme activity and has been studied in ADHD, migraine, and schizophrenia. See how pathway-level genetic insight adds context.