It is not made out of tea leaves.
Boiling water is poured over the choice of herb leaf, flower or root, and then left to steep for a while.
Sometimes seeds and roots are boiled and served after sweetening.
Herbal teas can be made from many ingredients.
In Japan, a tea made from roasted barley, known as mugicha, is made and drunk cold in summer.
In China, chrysanthemum tea is common, while hibiscus is popular in the Middle East.
Chamomile tea is sometimes used as a sedative.
Orange, lemon and other citrus peel are also used.
In the Andes, coca tea helps lessen altitude sickness.
Spices like fennel and ginger are used to cure a variety of ailments.
In some parts of North America, Labrador tea is consumed.
Nettle, sage, thyme and basil have been used from time immemorial to make herbal tea concoctions.
Herbal teas can be drunk as stimulants or even as relaxants.
Ginger tea is drunk to settle the stomach or even for congestion in the chest.
Some herbal trees are believed to have anti-cancer properties and are especially good for gastric, esophageal and skin cancers.
They may even help in lowering cholesterol.
However, some herbal teas can be toxic or cause allergies.
Comfrey could cause permanent liver damage when used in excess.
Lobelia is supposed to have the same addictive effects as nicotine.
Pineapple weed is sometimes passed off as chamomile and can cause reactions to those who suffer from hay fever.
If you drink herbal tea during pregnancy, read the labels on the packs carefully before you buy.
Strawberry leaf, lemon grass leaf, nettle leaf, alfalfa, fennel seed, rosehips, and lemon verbena are thought to be safe, but do check with a herbalist.
Herbal tea is available in ready-to-drink in cartons.
Some people even grow their own herbs.
However, only experienced herbalists should make their own combinations.
To drink the perfect brew, choose herbs with care and enjoy!