If a product uses the words "natural" and "herbal", it seems to make people feel safe. Actually, it's not entirely true. Examples abound. For example, tobacco leaves, coca leaves (the source of cocaine), marijuana (the source of marijuana drugs) and poppy (the source of heroin and morphine) are all natural ingredients, but they are harmful to health. Therefore, herbs can be divided into two categories: edible herbs and herbs without harmful side effects. When the formula is wrong or used improperly, it will be harmful to health. Some pharmaceutical manufacturers have no professional qualifications, so they can't use herbs or plants correctly when developing drugs. Other manufacturers are driven by business profits, completely ignoring the safety of consumers.

Here are some herbs with dangerous side effects. Sometimes, when ephedra is taken with plants containing a lot of caffeine (such as melon seeds), it will lead to sudden death such as stroke, spasm and high blood pressure.

Caffeine-rich herbs, including guarana seeds, kola nuts, tea trees and coffee beans. These herbs are widely cultivated all over the world, such as Masi and Sri Lanka.

They are very popular substances to lose weight because it is said that caffeine can promote metabolism. According to different varieties, the caffeine content of Guanana fruit is as high as 10%, the caffeine content of tea tree is about 3.5%, and the average caffeine content of coffee beans is about 2.2%.

Excessive caffeine intake can lead to anxiety, addiction and even death in hypertensive patients.

When some of these plants containing a lot of caffeine are mixed with herbs with diuretic effect to become ingredients in diet pills, they will make the body excrete a lot of water and cause temporary weight loss. This makes people mistakenly think that the caffeine-rich diet pills they take can burn fat. In addition, excessive diuretics can damage the kidneys. Guar gum (guar gum) GBNo. (GB20.025) Guar Gum is prepared from the endosperm of the seed of leguminous plant Cyamposis tetragonolobus by peeling, drying and crushing, then adding water, hydrolyzing under pressure, precipitating with 20% ethanol, centrifuging, drying and crushing. The main producing areas are the arid areas of Pakistan and India or the southeastern United States.

Guar gum is a weight loss ingredient, which was banned in the 1990s. Guar gum is a complex carbohydrate, which swells when wet, so it will feel full when eaten. However, its side effects include severe stagnation of stomach, throat and intestinal yin. Bai Liu peel contains salicylic acid, which is the effective component of aspirin. The FDA pointed out that this herb is used in some children's medicines, but the labels of these medicines indicate that they do not contain aspirin. White willow bark can cause some internal bleeding symptoms in adults who are sensitive to aspirin. The American Anti-Health Fraud Committee appealed to the public to pay attention to the fact that the use of white willow bark to treat chickenpox or flu in children will lead to a liver disease-Wright syndrome.