Can cod liver oil enhance memory?

Fish liver oil generally cannot enhance memory.

Fish liver oil is primarily a fat extracted from the livers of fish such as shark and cod. It mainly contains vitamins A and D, which are beneficial for vision and skin health. It also helps promote calcium absorption and can prevent or treat diseases caused by deficiencies in vitamins A and D. However, it usually does not improve memory. Poor memory may be due to deficiency of qi and blood, in which case medications that replenish qi and blood may be taken under medical guidance to enhance memory.

In daily life, it's important to ensure adequate sleep, maintain a balanced diet, increase protein intake, and consume more foods rich in vitamins.