Fol 123 Capsule 15's effectively treats various conditions caused by a lack of vitamins, such as anaemia (lack of red blood cells), peripheral neuropathy (nerve disorder), seizures (fits), hyperoxaluria (excess oxalate levels in urine), homocystinuria (accumulation of an amino acid called homocysteine in urine and blood), cyanide poisoning and hyperhomocysteinemia (high levels of homocysteine in the blood).