The connection between MTHFR gene mutations and blood clot risk often centers on homocysteine levels. The common story goes like this: if you have an MTHFR mutation, your homocysteine will be high, and that means you face a greater risk of blood clots. But this narrative oversimplifies a complex relationship.

Sunlight and folate have a complicated relationship, and new research has showed that the more UV exposure you have, the lower your red blood cell folate levels will be. Protect your folate status this summer!