Is what we are eating causing massive health problems?

I love to cook! All types of cooking, I even made baked goods for family and friends this Christmas! Theres something special about the joy of someone else getting pleasure and enjoyment of food you have baked! I even adapted my great grandmothers 100+ year old recipe to make a gf Christmas Pudding! The more I cook and enjoy it every day, the more im aware of the additives etc that are in store brought cakes, biscuits etc! If you make a cake or biscuits at home they only last for a few days, in a sealed container, maybe 5, but they won't last for months like the supermarket brands! I look at the rates of cancer, which are currently 1 in 2 people will end up with cancer and I have to wonder why? This is a matter very close to my heart, I've lost 2 grandparents from this horrible disease and have many family memembers who have fought this disease! Our parents and grandparents, particularly farming families like mine, were almost self sufficient! Take a step back 100 years and you made your own bread, cakes and slices, were all handmade, dinner was often rabbit (a meat killed by the men of the house, or women in some circumstances), nothing was spared, leftovers were used and re used and generally people were healthier! There was no flavour enhancers, little numbers on the back of products, it was only small stores in the city, no such thing as big supermarkets! In the city and country, there was a bread man, a milk man and a traveling salesman to buy things from! What troubles me, is there were significantly less rates of cancer and other diseases! You have to wonder if all these additives, and mysterious numbers in foods are affecting our health dramatically! I know that certain companies sell carcenogenic chemicals to large fast food operators, to go in there food! And it doesn't stop there,some wine companies use such chemicals to clean out their wine vats! All this ends up in our stomachs, processed through our bodies! To me, it has to have some impact on our health, the cancer and disease rates! I even had a gf pudding brought for me, it tasted nice, then I looked at the additives and numbers on the back and I was slightly concerned! Although even 100 years ago, coeliac disease would have existed, but it would have had a different name! I'm glad that we live in an era where diseases like coeliac are recognized and treatable! But I think I'd much rather cook the majority of my food, to remove all the additives and nasty unknown products, then buy pre made food! What's your thoughts on this? Do you agree with me or have another theory? I'd love to hear your comments! Don't forget to follow me by clicking on the follow me tag or follow by email, I'm also on Twitter @MMOAGF and Facebook on the page Mishaps and Mayhem Of A Gluten Freee Life, just click the like button. I await your comments!