gbryant I can personally recommend the Paleo diet. Essentially it consists of foods that are readily identifiable as something that was raised or grown. In other words, avoid processed foods. For example, honey would be preferable to any form of sugar or syrup as a sweetener. If it comes exclusively in a cardboard box or plastic bag then you should consider avoiding it.
For a faster result you can try either end of the spectrum of elimination diet: vegan or carnivore. Keep in mind that either of these will have some long-term drawbacks that require supplements. These are best used short-term to eliminate diet-related symptoms and then slowly re-introduce foods until you identify the source(s) of undesirable symptoms.
Many autoimmune disorders and cancers may be caused by glyphosate in our food chain, hence the rise in popularity of organic and grass-fed labels. The only issue with going by these labels is that they may not avoid glyphosate entirely. For example, the grass-fed label only means that at least one meal was grass whereas the animal may have been feed glyphosate containing grains at one or more time(s) in its life or grazed in a field saturated with glyphosate run-off water. The only way to ensure you are avoiding glyphosate is to be intimately familiar with your food sources by developing direct relationships with the producers or to produce for yourself.
*Edit - removed molasses since it requires reduction by heat, a form of processing. I still think being from sorghum is preferable to any corn syrup, but it is still considered a processed food.