L-tryptophan is an essential amino acid that helps the body make proteins and certain brain-signaling chemicals.
Your body changes L-tryptophan into a brain chemical called serotonin. Serotonin helps control your mood and sleep.
The progesterone in these creams can effectively travel through the skin and into the bloodstream, according to research. In one study, menopausal women used 40 milligrams of cream twice daily, placing it on their arm, thigh, breast, or abdomen. Their blood levels of progesterone were as high as when they took progesterone capsules by mouth.
Can you get progesterone naturally from foods?
Many plants make progesterone. The progesterone in creams bought without a prescription is made by processing ingredients from plants, such as yams.
What are the risks of using progesterone?
Side effects. Progesterone may cause side effects such as: