Hormone precursors are substances that help produce hormones. They can be natural or synthetic. Some examples of natural precursor hormones are vitamin D and vitamin B6. Synthetic hormones are made in laboratories and are usually more potent.
This substance help with sleep because they help produce the hormones that regulate sleep, such as melatonin. Melatonin is a hormone that induces sleep and is produced naturally by the body. However, it is common that we fail to get the optimal amount of the hormone precursors, but it is possible to change this with the use of supplements, improving sleep quality and optimizing latency and duration.