I find conflicting data on the daily production of Progesterone in men. The above study shows 5 to 15mg, which seems allot to me, the study below shows 1.5 to 3mg daily
[URL unfurl="true"]https://www.sciencedirect.com/topics/nursing-and-health-professions/progesterone[/URL]
"
Alicia Stanton MD, in Integrative Medicine (Third Edition), 2012
Progesterone
Progesterone has not been as thoroughly studied in men as it has in women. Progesterone is the third hormone in the cascade starting from cholesterol and is the precursor to cortisol, testosterone, and estrogen. In healthy men, progesterone production is approximately 1.5 to 3 mg per day, and the hormone is produced almost entirely by the adrenal glands. As men age, progesterone production decreases.138 However, it does not decline as rapidly as DHEA or pregnenolone. Progesterone helps reduce the level of estradiol in the blood by increasing the conversion of estradiol and estrone, which is 10 to 12 times less active than estradiol.139 Therefore, progesterone deficiency can be seen in diseases that are associated with estrogen excess such as gynecomastia, ischemic heart disease, BPH, and, possibly, prostate cancer.140
Progesterone is also known to reduce the level of DHT in the blood and the prostate by competing for the 5-alpha-reductase enzymes where it is converted into 5-alpha-dihydroprogesterone. This, in turn, limits the ability of 5-alpha-reductase to turn testosterone into DHT.141 Progesterone also has a calming effect on the body. When it is given orally, its metabolites, pregnenolone and allo-pregnenolone, increase relaxation by stimulating the gamma-aminobutyric acid receptors. Progesterone has been used in men to help reduce insomnia.142"