When I had my 23andme test last year it came back that I was MTHFR etc., and my then FD said I needed to take Hydroxycobalmin, not the methyl that I was taking. My levels on my last blood test (in profile) arn't too bad so I cut down on taking every day.
When I had my OATS test done recently it says I have a high methylmalonic acid marker which is seen in poss vit B12 deficiency or defective absorption.
My now nutritionist says I need methyl and not hydroxy.
Confused.com - I have no idea what to take