Almost all of the food today are not anymore pure of what they are truly be. They are mostly processed or if not processed it's origin has some enhancers that mostly can benefit the farmers or the suppliers.
Most farmers nowadays are using some fertilizers and other chemicals that may be harmful to our health. Farmers are looking forward for more profits and they do harvest better and faster.
For some meats that we eat also has some contents from feeds. There are also many processed foods nowadays that are cooked instantly and not anymore organic which are all available in groceries.
Aside from that there are junk foods and sodas also that can really be harmful.
So if you do want to take your body healthy, try to choose the right food to eat. There are still some organic foods available but they sometimes cost higher than those who are not organic.
Or you can plant your own vegetables in the province if you have one, and never put anything like fertilizers which we know that has chemical contents. Make it as a pure nature grown vegetable or fruits.
Better to be conscious always and never just take it for granted. Your health is at stake here.