Coffee is a great refreshing drink, and the average person can consume up to 400 mg of caffeine per day - equivalent to about 4 cups (950 ml) of coffee.

Pregnant and lactating women are recommended to consume 300 mg of caffeine per day, and some studies suggest a safe upper limit of 200 mg per day.

For most people who wake up around 6:30 a.m., the best time to drink coffee is between 9:30 a.m. and 11:30 a.m.

The main ingredient in coffee is caffeine, along with some sugar, fat, protein, fiber and some acids.

These substances can stimulate the secretion of stomach acid, especially caffeine.

If you want to enhance the beneficial effects of coffee on exercise, it is best to drink coffee 30 to 60 minutes before exercise or sports.

Overnight coffee is not recommended, and whether overnight coffee can be consumed depends on the specific circumstances, mainly related to whether it is stored properly, whether the coffee is spoiled and other factors.

1. Overnight coffee can contain more tannins after being placed, and the substances in it will be oxidized, resulting in a relatively weaker refreshing effect and worse taste.

Therefore, it is still recommended that coffee is best brewed and finished that day.

2. If properly preserved, not contaminated and not deteriorated can drink.

For example, after boiling and brewing coffee, the coffee will be poured into a clean closed vessel, to be stored in the refrigerator after the temperature is not hot, to minimize the possibility of breeding bacteria, you can drink.

If placed in a higher temperature, air humidity environment, and not properly sealed, it is easier to breed bacteria.

And after reheating the nitrite content will relatively increase, so that coffee deterioration, drinking may produce certain damage to the body.

Such as nausea, vomiting, diarrhea, abdominal pain and other gastrointestinal symptoms, and even food poisoning.

Therefore, such cases should not be drunk.

In addition, some special groups of people need to pay attention to caution when drinking coffee, such as children, pregnant women, the elderly, and special groups of people suffering from stomach diseases, heart disease, allergies to coffee, etc..

To avoid aggravating the disease or other adverse effects on the body.

At the same time, when drinking coffee should be careful to avoid drinking too much, such as not more than 3 cups per day, as well as avoid drinking strong coffee, so as not to cause discomfort.

Snow-top coffee can neutralize the bitterness of coffee itself, becoming one of the favorite drinks of most people, and the correct way to drink snow-top coffee is not to drink it in one go like coffee, first eat the top of the ice cream with a spoon first.

Stir it after eating to let the bottom layer of stuff coffee and ice melt. Then insert a straw and drink it straight through.