“folate – elevated homocystine, normal MMAB12 – elevated homocystine and MMA” June 22, 2017 mfadmin Medicine Average Rating 0 out of 5 stars. 0 votes.You must log in to submit a review. “folate – elevated homocystine, normal MMAB12 – elevated homocystine and MMA” B12 vs folate def labs