vitamin b12 injections in pearland & Lipo McMurray, PA IV Infusion Therapy | Pearland
Description
MTHFR is not only important for the formation of 5-MTHF (and thus the methionine cycle) but also for the regeneration of BH4

[DOI] [PMC free article] [PubMed] [Google Scholar] 26

Logan Rohatinsky, Maple Mountain, Jr., 4:19.19
A separate meta-analysis that pooled results of trials in older adults with mild cognitive impairment found B-vitamin supplementation (6 to 24 months, depending on the trial) had no benefits on various cognitive parameters, including executive function, information processing speed, and episodic memory (90)

More information about WADAs decision on THC is available here
