Evening Primrose Oil to ease PMT?

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Does anyone have any experience of taking Evening Primrose Oil to help ease PMT?

I was on Microgynon for years but came off it after having DD 5 years ago and DH had a vasectomy. I thought the PMT would abate but if anything its got worse. 2 or 3 days before my perid I am snappy, irratable and exhausted.

If not EPO, then can anyone recommend anything else?

Diet and exercise? I'm going to try it...

It doesn't seem to work on mood. Seems to be better for bloating & tender breasts something to do with prostaglandins. I took it for months at the highest dose but it had no affect.
Keeping blood sugar levels constant seems to work for me. I also take a multivitamin for women.
Agnus Catus is supposed to balance the hormones. I haven't tried it though. Also B vitamins B6 in particular. Magnesium also.

I had it for pmt I used to get moods bloating stress etc I was on a research programme at st Thomas's in London looking at the effectiveness of evening primrose for pmt and for me it really worked. I also had to take b6 B vit c vit and magnesium. I took 1000mg a day starting at about day 12 until my period. I'm talking in the past tense cause I'm past it now