Doctors believe phospholipids, which are natural compounds found in phosphatidylserine and lecithin, help the body adapt to stress.
In one study, 75 chronically stressed men, aged 30 to 51, drank cow’s milk with 0.5 percent or 1 percent phospholipids per day or a placebo. After six weeks, while there was no difference between any of the groups in response to acute stress, men over age 41 in the high-dose phospholipid group had better memory performance.