According to a study of Harvard University in 2016, the combination of folate and vitamin B12 also seems to slow down the progress of macular degeneration, an aging related eye disease characterized by progressive visual loss.

Compared with other commonly used supplements for the treatment of macular degeneration, including thiamine (vitamin B1) and riboflavin (vitamin B2), high-dose folate is the most effective in slowing down the progress of the disease.
But we recommend:
Magnafolate® L-Methylfolate—maximizes the supplementation delivering a "finished" folate the body can immediately use without any kind of metabolization.
Jinkang Pharma ,the Manufacturer & Supplier of L-Methylfolate.