Health benefits of dandelion root tea and dandelion greens

I have checked out the article "8 Reasons to Drink Dandelion Root Tea", and I noted it has many health benefits, such as improving digestion, easing congestion of the liver, purifying the bladder and kidneys, reducing risk of urinary tract infections, purifying the blood, regulating blood sugar, improving blood circulation, easing bloating and aching joints, and curing skin conditions, besides containing calcium, magnesium, iron, zinc, potassium, and vitamins B and C.

I also learnt from Adamo's website that dandelion is considered safe for blood type B. The description in the website also says dandelion can add interest to salads. I think I may have eaten dandelions before when I eat salads once in a while.

"The bright green leaves have a slightly bitter, tangy flavor that adds interest to salads. They can also be cooked like spinach. The roots can be eaten as vegetables or roasted and ground to make root "coffee." Though they're available until winter in some states, the best, most tender dandelion greens are found in early spring, before the plant begins to flower. Look for bright-green, tender-crisp leaves; avoid those with yellowed or wilted tips. Refrigerate, tightly wrapped in a plastic bag, up to 5 days. Wash thoroughly before using. Dandelion greens are an excellent source of vitamin A, iron and calcium."

(Source: http://www.dadamo.com/typebase4/depictor5.pl?138)