I totally agree that we should try to get the nutrients we need from food. But conventionally grown fruit and vegetables are progressively lower and lower in minerals. Farmers use chemical fertilizers that don't replace all the minerals that are depleted from the soil, so each successive crop is a little bit less nutritious than the one before it. Produce that is toxic with Roundup / glyphosphate carries a double whammy because, in addition to being low in nutrients, the herbicide contaminant depletes glutathione (glutathione is used to "escort" toxins out of the liver). Organic produce is usually richer in nutrients than non-organic but can be quite expensive, if you're not in a position to grow your own. For certain nutrients, it can be quite a challenge to obtain them from food. So ... supplements might be in order for some people.