Does anyone know when I should stop taking methyl-folate before having serum folate levels checked? I know for B12 it is 10 days, but does that apply to folate as well? Is red blood cell folate a better measure for folate levels? My lab won't be fasting, and I know serum folate is affected by recent nutrient intake. Also, I really don't want to stop taking the B12 for 10 days, and I'm not even sure if my doctor will check it... what do other people do about that? Thanks!