Is bacon a vegetable?

Best to eat a variety and seasonally. You can indict most veggies one way or another. Talking about anti-nutrients, as with anything: the dose makes the poison.

I'm a big believer in the health benefits of crucifers aka brassicas (broccoli, cabbage, cauliflower, kale, turnips, etc.) -- they're loaded with vitamins, indoles, and other good stuff. If I was in some hypothetical situation where I had to pick one group of veggies, that's probably what I'd go with. But in large quantities, they can negatively affect thyroid function, they interact with metabolism of some drugs, etc.

Variety's where it's at.

Sorry, can't narrow it to one. Why would I want to?

I eat lots of rich dark leaf lettuce and cukes and celery. I also eat a lot of onion. The other veggies I eat frequently are cabbage, asparagus, broccoli and cauliflower. Sweet potato is an occasional.

+1 to Matt. For example, asparagus is discouraged for people prone to gout. Excessive spinach consumption can contribute to kidney stones. But, in moderation, both are nutritious.

I eat spinach, eggplant, onions, peppers, and green beans but I feel like spinach is the healthiest of the bunch... it's really green, there's very little sugar, it ain't a nightshade, and its nowhere near to being a legume.

I don't see any reason to go beyond the sweet potato.

Sauerkraut is an all-in-one.

zuchini, red bell peppers, brocolli, leek,

Spinach for the win. Very high in folate AND betaine, vitamin K, carotenes, and chlorophyll.

I also like brussel sprouts a lot, both for taste and health. Although they contain less bang for the buck than spinach, they are a crucifer and so provide isothiocyanates which are probably good.

Celery. Didn't you get the memo?

I really like sweet potato leaves, guava leaves (which I ate in the highlands of Vietnam) and tapioca leaves (often cooked in coconut). All are high in anti-oxidants. I eat these everytime I see them in a vegetable rice stall (not vegetarian)

I also eat bitter gourd/melon-a fruit actually. They are said to be excellent in vitamins (B1, B2, B3, B5, B6 and C) and minerals (zinc, phosphorus, manganese, magnesium and iron). They are said to have twice the calcium of spinach and twice the potassium of a banana. The carbohydrates are low and the dietary fibre is high. They are said the be good for diabetes and toxaemia because of their phyto chemical compounds (phyto-nutrient, polypeptide-P (insulin-like)) and (hypoglycemic agent called charantin-said to increase glucose uptake and glycogen synthesis in the cells of liver, muscle and adipose tissue). There are a lot of websites with info on the bitter gourd/melon. I am hoping there will be more scientific tests on it. As there are also some toxic concerns, mostly from traditional sources. The exact effects on the liver have not yet been studied. You can check the USDA nutrient constituent values of raw bitter gourd: http://www.nal.usda.gov/ Although its quite bitter I have been eating for the past 15 years.

Any discussion of paleo-friendly vegetables that mentions peppers and other nightshades (peppers, tomatoes, potatoes, eggplant, goji, tobacco) without mentioning the potential harmful effects of glyco-alkaloids is doing a diservice.