Nothing is certain in life, it's it, but I think eating well and limiting toxin exposure is only a good thing. These factors are linked to cancer, heart disease, autoimmune disease, mental health and basically all chronic health issues. It's also going to improve your quality of life while you're alive anyway, so what's to lose.
Since dropping all the processed foods and decreasing sugar overall I'm losing symptoms that I now realise we're insulin resistance. I've never been overweight, either, so I'm not someone you'd traditionally expect to be developing insulin resistance/type 2 diabetes. My mental health has also improved dramatically.