Nutritional Pharmacology of Folic Acid: Multi-Axis Mechanisms in Methylation, Neurotransmitter Synthesis, and Endothelial–Metabolic Regulation Dietary Modulation and Clinical Implications Across Cardiovascular, Neuropsychiatric, Reproductive, and Hematologic Disorders 0009-0007-5798-1996 DOI: 10.5281/zenodo.17512708
