For this reason, it is sometimes recommended to combine racetams with a source of choline, such as alpha-GPC or citicoline.
ດ້ວຍເຫດຜົນນີ້, ບາງຄັ້ງບາງຄາວແນະ ນໍາ ໃຫ້ສົມທົບ racetams ກັບແຫລ່ງ choline, ເຊັ່ນວ່າ alpha-GPC ຫຼື citicoline.