Ehret believed in eating nothing but fruits and starchless vegetables like spinach, carrots and cucumbers.

CNN: What's the danger of an all-fruit diet?

In particular, it is important to regularly consume dark green leafy vegetables including spinach, romaine lettuce, or kale which are good sources of vitamin K, E, and C, as well as beta-carotene rich, orange-colored vegetables such as carrots, sweet potatoes, and squash.

CNN: Is it OK to eat the same foods every day?

It looked at vegetables such as carrots, lettuce and spring onions which were grown close to or in contact with the soil and which were sold to be consumed without any further cooking or preparation other than light washing or scraping.

BBC: Carrots

Rare organic vegetables locally raised meats and poultry and tables filled with beets and carrots are in evidence.

FORBES: The Summer Bounty from Farm to City

Put as simply as possible, it advocated eating from all food groups every day -- two cups of fruit and two and a half cups of vegetables a day, including veggies both dark green (kale, broccoli) and orange (carrots, squash), starches (potatoes, corn), and "other" (artichokes, green beans).

CNN: Healthy habits: A month of living perfectly