Fig. 2: Forest plots of effect sizes for transmethylation cycle and transsulfuration pathways.

Meta-analysis of pooled data from the included studies showing the association between homocysteine (A), methionine (B), cysteine (C), SAH (D), SAM/SAH (E), and ASD. SAH S-adenosylhomocysteine, SAM/SAH S-adenosylmethionine/S-adenosylhomocysteine, ASD autism spectrum disorder.