My B6 pain gets worse during my
period. But my pain is in my breasts,
and as you know, breasts are more tender during
your period, so I think it's just additive, in my case.
Before I knew that my pain was due to B6 toxicity, I had read that many women have breast pain called Fibromyalgia. And that it is reduced by taking Evening Primerose oil. So I rushed to the store and bought some. And it made my pain markedly worse.
Apparently, it includes soy and soy lecithin.