Can men use natural progesterone?

Men over 45 can use natural progesterone.One benefit is an increase in the libido.Progesterone is the precursor of testosterone.Testosterone can stimulate new bone formation,increasing bone density;a lack of it can cause osteoporosis.Older men with rheumatoid arthritis have reported relief from pain and swelling after rubbing natural progesterone in a cream base on their joints.