Vitamin B-12 supplements can improve memory if the individual is suffering from vitamin B-12 deficiency, according to Healthline. Evidence suggests that a large amount of vitamin E can aid individuals with midlevel Alzheimer's disease, but some experts claim the effective dosage is unsafe.
No evidence shows memory benefits of vitamin B-12 in individuals with adequate vitamin B-12 levels. Vitamin B-12 deficiency is most prevalent among strict vegetarians, the elderly and individuals with bowel issues. Most people can maintain adequate levels of vitamin B-12 and vitamin E from a balanced diet. High amounts of vitamin E are dangerous for individuals with cardiovascular issues and increases the risk of prostate cancer.