We Are So Confused. We've Done Paleo Last Year And

We are so confused. We've done Paleo last year and my husband lost 40 pounds. It's harder for me since I only eat fish. Would love to eat more whole grains like new Harvard study/Dr. Weil suggests. What's your take? A lot of the Whole 30 plan makes sense, but so does grains and yogurt. Need a definitive answer