Thanks for all the info. I have heard of vitamin D , of course, but not Vitamin D3.

Turkey is renowned for Triptophan. Should we include this in our diet once a week? I did not know that there were pills with Triptophan. I suppose if the source is food, such as Turkey, it is more beneficial for the body.

If old age causes so many problems because of the surplus production of... (forgot the word), then medication that produces (?) serotonin might be a consideration for old people. Question mark here. Some old people seem to be OK but simple blood tests could tell a doctor if a prescription is recommended.

It disturbs me to think that people out there are suffering and not sleeping when there is a solution.

Thanks again for the info. and forgive any mistakes i might have made!