This thread seems a lot more balanced and informative than the one that spawned it.
I eat a lot of vegetables and fruit along with small amounts of meat particularly oily fish (smoked Mackerel aaaaaaagh). I to avoid the trans fatty acids found in Hydrogenated vegetable oils.
Here's a few diet health tips I've come across over the years.

Oily Fish- Essential Fatty acids (good for lowering cholesterol). Tined fish such as pilchards, rich in calcium.

Tomatoes- Cooked with oil, the richest source of Lycopene (helps protect against arteriosclerosis)

Avoiding osteoporosis- This is particularly important for women. Some foods Cheese and meat being the worst create acidic digestion products, as these enter the blood system for transport they cause the body to compensate to avoid the bloods pH dropping. If the amount is small the citrate buffer system in the blood sufficient to cope, but with large amounts the body responds by making Amines from protein in the Liver and mobilising Phosphate from the bones(this also mobilises Calcium from the bones).
Fortunately green vegetables and fruit have the opposite effect, so eat Cheese and meat with plenty of veg(Spring Cabbage aaaaaagh).

Garlic- I think every one knows about this, and the other members of the Onion family

Cinnamon- This is reputed to help prevent late onset diabetes, the health effect coming from 1/4 teaspoon a day.

All the best PP