Dark green leafy vegetables are, calorie for calorie, are the most concentrated source of nutrition of any food group.

Greens are a rich source of nearly all of minerals & vitamins (B12 is the only one absent). They also provide a variety of phytonutrients including beta-carotene, lteuin, & zeaxanthin, which protect our cells from damage & our eyes from age-related problems, among many other effects. Dark green leaves even contain some amounts of Omega-3 fats.

List of edible WILD greens:

Borage leaves and flowers

Chickweed, Clover

Dandelion greens and flowers

Fiddlehead ferns

Lambsquarters (Goose foot)

Miner’s lettuce

Plantain, Purslane

Sorrel (common and wood)

Stinging nettles

For Optimal health, human need to consume at least 2 pounds (1 kg) of greens daily. It can be easily  achieved by drinking 1-2 litres of delicious Green Smoothies. (see Alive Recipes)

Studies showed " it was common for our ancient ancestors to eat up to 6 pounds of leaves per day. 

Wild Chimpanzees (share 99.4% genes with human) consume much more Greens (40% of total food intake & with over 100 varieties). These animals have extremely strong natural immunity to fatal human illnesses; and also are 3 times stronger than human physically .

Few of us even eat the minimum recommendations of 3 cups of dark green vegetables per week, let along the raw & living greens. 

Further Reading:

Victoria Boutenko, Green For Life  (2006)