The risks often cited with progesterone are actually side-effects only noted with progestins, analogues of progesterone. It appears from several studies that progesterone is quite devoid of side-effects and may have several benefits. It does not appear to be associated with increased breast cancer/cardiovascular risk, improves well-being in some (anti-depressant and anti-anxiety), helps some actually lose weight and reduces bloating, has a synergistic action with estrogen (complements it by increasing vasodilation and increasing breast volume), helps some sleep better, increases body temperature, enhances libido, makes skin and hair less dry (more soft), makes nails stronger, is rejuvenating. Too much may make you lethargic. It will make you sleepy/drowsy, so best to take before you go to bed until you body gets used to it.
The occurrence of headaches and bloating and other pms symptoms with progesterone could, i think be avoided if taken twice or three times daily to keep levels steady. But, this is speculation, not sure at all.
Progesterone is NOT androgenic, either has no effect or reduces blood pressure, much like estradiol. Tends to actually reduce water retention.
So, overall, I think, wayyyyyyyy more benefits than drawbacks. Not to be confused with other progestins like medroxyprogesterone acetate or those in birth control pills. You could always try for awhile and see what happens. Ask your doctor about it and see what he/she says. Could prove worthwhile.

I like it.