A Paleo type diet works great for insulin resistance. Metformin also helps to improve insulin resistance.
Way back in the day when I was trying to get pregnant, and we had no clue that it was because of my ex’s infertility, I was put on metformin for PCOS in hopes of helping me to ovulate. It did a serious number on me. GI issues were baaaaaddd. I did lose weight for obvious reasons? Lol. But I’m definitely considering paleo. It’s a lifestyle change, but I guess I gotta do what I gotta do.