Natural relief for teens with period pain

Hi Dear All,
I am concerned that my teens have significant period pain, sometimes before, & the first couple of days, with one vomiting on her first day from severe pain, though not as often now. Her uterus position is fine.
Her diet is appalling ( uni food is appalling so she is going to cook more ).
I know that over the counter pain relief, ( Panadol) for my youngest, & the prescription (pain & anti - vomit ) that my oldest uses sometimes, are not safe in the long term & can lower tolerance to pain, leading to the need for larger, stronger doses, & the physical damage.................
Would you believe the gyneo told my oldest, to take the prescription meds before she felt her period coming & for the duration - even though the need was only ever the first day & NOT every month!! ?? I am thankful she didn't listen to him in that regard....( I'm glad I was there )

The prompt for me to write this was my 17yr old telling me this morning that many of her peers were on the pill for pain & pimple control....there has got to be a more natural way!!
I have told them not to tuck & suck, which I am sure Whole woman Posture is a cure in itself, & I think they are listening.
They now won't be told what to eat, so I don't really have much control except the meals I cook. I use good quality protein, ( grass fed when possible)natural fats, veg etc, & as little sugar & seed oils as possible. Organic food is not something I can purchase easily, & am starting veg & herb garden.

Evening Primrose Oil supplements is a remedy that was popular in my youth, however it is Omega 6. I know that p/pain is an inflammatory condition, made worse by poor posture, & the modern diet is Omega 3 poor, with too much Omega 6.
I am toying with the idea of giving them some of my Magnesium Chelate supplement, a relaxant.
Has anybody got any other easy ideas that I can sell to my teens? Many thanks in advance.
Best Wishes & (((hugs)))
Aussie Soul Sister