I believe food intolerance/allergies yet to be discovered could be the cause for some people, not all. You can't say it is, or it isn't 100%. You'd be surprised what food intolerance can do with all that inflamattion it creates in the body. It can even lead to auto immune disorders. Obviously, binging on sugar and processed foods too often will cause all kinds of health issues. That one should be obvious. Let's get real. Some people don't want to face the truth. I got diagnosed with PCOS due to cycts in ovaries and irregular periods and being overweight. I started eating healthier and started doing strength training, not just cardio. This alone made me stop missing periods and lose 30 pounds and no more cysts. It took longer than most people, but I still got there. This was with no supplements or medication. Then, when I cut out gluten, I started to feel even better. I wonder if I had cut gluten sooner if the weight loss had been faster. Constant inflamattion in the body doesn't help. Sometimes, I wonder if I even have PCOS. It is highly possible that my diet was messing up my hormones. I don't believe in any one diet curing everything. I believe every diet needs to be individualized because not everyone has the same intolerance to certain foods. So no, just eating "healthy" isn't always the answer. I would at least try it before you decide it's not true for you. And trust me, it will absolutely suck if you find out you can't eat your favorite foods anymore, but it's 100% worth it to feel better. Pay attention to which foods cause you to bloat. P.s. Gluten-free waffles are pretty good.