The main difference between black tea and green tea is only the degree of fermentation. In other words, how long the tea leaves have been exposed to oxygen. Remember how the cut of an apple turns brown? It's the same process. But which of the two varieties is healthier? The word of evidence-based research.
Which tea tastes better and is more flavorful
This is purely a matter of taste. The best way to understand is to try many different varieties, making your own preference map.

As a reminder:

Black tea is usually more tart, with nutty, floral and fruity notes in the flavor. The color of the infusion ranges from copper-red to dark brown.
Green tea is light, herbal, with floral and honey notes. The color of the infusion can vary from light golden to bright yellow.
Which tea is easier to brew
Black tea can be safely poured with boiling water, while green tea is brewed with water no higher than 70-80 °C. Otherwise, you will be left without such valuable vitamins and antioxidants.

Tradition suggests a long insistence of tea in a teapot. Then the drink is drunk, diluting it with hot water. From the point of view of titsters, this method is not ideal, but it is not bad for black varieties. But with green varieties, it is always better to use the spillage method - this way you will not spoil the tea with boiling water and will preserve the maximum beneficial properties of the drink.

Want to stay young and attractive for years to come? Drink tea. Scientists assure that daily tea drinking helps to keep your skin healthy and beautiful. We tell you what kind of tea you should drink and why.
What substances in the composition of tea affect the health of the skin
Lack of vitamins and microelements is always reflected in well-being, and, as a consequence, the skin loses its radiance and shine. Therefore, in order to preserve beauty and youthfulness, it is important to monitor the diet in the first place, and already in the second - to use care cosmetics. Tea in this sense - a unique product: it can be both drunk and applied externally. Let's consider three substances in the composition of almost any tea, which are important for general health and for the skin in particular.
Polyphenols help in the fight against excess sebum and in the treatment of acne. This conclusion was reached by American scientists, combining eight studies from different years. And also these antioxidants support the intestinal microflora, which is very important for the quality of the skin.
Tannins neutralize the action of free radicals - the main provocateurs of aging of the body.
Epigallocatechin gallate (EGCG) helps moisturize the skin and slows down wrinkle formation. The protective functions of EGCG were analyzed by Japanese scientists in 2018 and noted that it could be a potentially effective ingredient in cosmetic products.
Which tea to drink more often to keep your skin young
Green tea: relieves swelling and redness
Ever notice how many skincare products contain green tea? It's no wonder: many studies confirm its antioxidant properties and benefits. For example, American scientists, based on the proven anti-inflammatory and anti-carcinogenic effects of green tea, write: the drink is effective in treating a variety of skin diseases. It relieves swelling, protects against UV rays and reduces sebum production. White tea: protects against the harmful effects of ultraviolet light
Researchers from the Cleveland Clinic and Case Western Reserve University (USA) discovered in 2003 that white tea protects skin cells from oxidative stress, which causes aging, and the harmful effects of sunlight. It also reduces the activity of enzymes that break down collagen and elastin, important proteins responsible for skin smoothness.

Tea is not a substitute for blood pressure-lowering drugs. However, it can be really useful for hypertensive people - science confirms it. Tea has earned its reputation as a protector of the heart and blood vessels thanks to polyphenols and flavonoids. We tell you what kind of tea helps to lower blood pressure.
Types of phyto teas that help lower blood pressure
Tisanes can help to gently reduce blood pressure - someone will feel better after just one cup. However, it is still not worth counting on an instant effect. Most studies consider the positive effects of phyto tea in the long term. For the drink to work, it must be drunk daily for several months. In this case, according to scientists, the pressure can normalize, and the risk of hypertension - reduce by an average of 10%. So, what types are considered particularly useful.
Carcade stands on the first place among the tisanes that reduce blood pressure. It gently dilates blood vessels, because of which blood flow improves. This is confirmed by a 2019 Iranian study published in the Journal of Advanced Pharmaceutical Technology. The participants of the experiment drank two cups of carcade tea every morning for a month, which led to a significant reduction in blood pressure. This effect is due to anthocyanin and other antioxidants that are beneficial to blood vessels.
Chamomile tea, similar to hibiscus tea, relaxes blood vessels. The drink is known to calm the nerves, has a mild sedative effect, and relieves tension and anxiety. And when the body relaxes, heartbeats slow down and blood pressure decreases.
Ginger tea is a blood thinner. A 2017 Chinese study found that those who consumed ginger daily had a reduced risk of hypertension. Although the study did not specifically look at ginger tea, drinking this beverage may still be beneficial for hypertensive individuals.

Thyme tea is rich in rosmarinic acid, which, according to many studies, reduces inflammation, lowers blood sugar levels, and improves blood flow. This all also helps to gently lower blood pressure.
What about oolong, black and green teas?
Oolong, black tea and green tea all contain caffeine, which can raise blood pressure. A cup of black tea has about 70 mg, while green tea has about 40 mg. The least amount of caffeine in oolong is 30 mg. However, in addition to caffeine, there are other substances in the composition of drinks that are useful for hypertensives. Black tea contains thearubigins and theaflavins. These substances give the infusion a reddish hue, astringent flavor, and also reduce blood pressure. This happens by relaxing the blood vessels. Daily tea drinking helps strengthen the heart and normalize cholesterol. A 10-year Swedish health study of 74,961 participants found that four or more cups of black tea a day reduced the risk of stroke by 21%. 

Green tea is packed with antioxidants that increase blood flow and have a positive effect on blood pressure. In addition, the beverage is known to reduce the intensity of inflammation in heart tissue.