The Hibiscus plant is a flowering shrub that produces colorful flowers commonly used in landscaping. The flower is also used to brew a beneficial herbal tea that can be drank cold or hot. The tea has an unusual tart flavor similar to cranberry, with an element all its own.
Hibiscus herbal tea is easily brewed from an infusion of crimson - deep red magenta flower calyxes. The most commonly used type of Hibiscus is Hibiscus sabdariffa, but other varieties can be used as well. It can be consumed solo, but many people feel it is too too tart, so flavoring agents such as honey, stevia or sugar are frequently added.
Medicinal Properties of Hibiscus Tea
Tartaric acid, which is responsible for the tart taste of hibiscus - Works as an antioxidant and anti-inflammatory agent which bolsters the immune system and promotes overall wellness. it Improves glucose tolerance and lowers overall glucose levels.
Tartaric acid also aids digestion by helping to improve intestinal absorption. Improved intestinal absorption is believed to expedite the nutrient absorption rate into the bloodstream from consumed foods.
Over consumption of tartaric acid sometimes results in vomiting, increased thirst, abdominal pain, gastrointestinal inflammation, farting and diarrhea.
Malic acid is a naturally occurring organic compound commonly found in many fruits. It is most frequently used as a food preservative. Malic acid is effective as a metal chelator, it binds to toxic metals accumulated in the liver as well as other parts of the body, somewhat rendering them inactivate, and reducing their toxicity.
Malic acid also softens cholesterol, in particular that in gallstones, liver stones and kidney stones, allowing for their smooth passage. Malic acid also acts as a liver and gallbladder cleansing agent which sets into motion a biological chain of events that enables the rest of the body to self heal itself. 
Hypertension -High Blood Pressure
Hibiscus contains the flavanoids - "anthocyanins", which are believed to be active anti hypertensive compounds. The anthocyanins in Hibiscus Tea can lower high blood pressure. Particularly in people with type 2 diabetes .
Anthocyanins as well as other secondary agents found in Hibiscus flowers also alleviate hypertension. Studies have also indicated that hibiscus tea will lower high blood pressure in many instances. Anthocyanins occur in the leaves, stems, roots, flowers, and fruits of nearly all plants, but it is particularly concentrated in the case of Hibiscus.
Hibiscus has also been proven to have strong anti-microbial properties.
Hibiscus Tea Recipes
Infusion process which works well with fresh, as well as dried herbs. Bring water to a boil, add 1 teaspoon of your dried ingredient per cup- - seep it in the water to allow the flavor to permeate the liquid. If you're getting into herbal teas you might want to consider getting a mesh ball - basically a metal tea bag.
Another method of making an infusion is to add a cup of dried herbs to a quart jar. Pour boiling water over the herbs to the top of the jar. You should also place a metal spoon or utensil in the jar when you are pouring the hot water if you are using glass. The metal will absorb the sudden heat and prevent the glass from shattering. Remove the metal utensil and cover the jar tightly with a lid. Let the herbs steep up to 10 hours and then strain.
There are several warnings and cautions associated with hibiscus.
Expectant mothers should avoid hibiscus tea.
Hibiscus contains polycylic aromatic hydrocarbons [PAH], which are associated with cancer and birth defects.
Prenatal exposure to PAH is associated with Asthma and mental acuity of the offspring. A study from The Center for Children's Environmental Health reports that exposure to PAH during pregnancy is related to low birth weight, premature delivery, heart malformations. Cord blood shows DNA damage that has been associated with promoting free radicals and cancer.
In India Research conducted by Guru Jambheshwar University of Science and Technology reported that hibiscus tea reduces the level of estrogen especially in women.
References / Footnotes
1. 5 Benefits of Malic Acid on the Liver
2. The effects of sour tea (Hibiscus sabdariffa) on hypertension in patients with type II diabetes