South African doctor tea, also known as South African black tea, is a kind of tea made from wild tea trees in Cape Valley, South Africa. It contains antioxidants, which contribute to heart health, lower blood sugar and improve skin health. It does not contain caffeine, so it is suitable for people of all ages, including the elderly and children. South African black tea is used by some people to treat insomnia, allergies and gastrointestinal problems. However, it should be noted that although it has many benefits to health, there is little human research. High dose may be toxic to the liver, may be contaminated by bacteria, and may also cause drug interaction. Therefore, it is necessary to control the dosage every time to avoid drinking at night, so as not to affect the quality of sleep. Although South African doctor tea has some health benefits, it should not be regarded as a panacea with magical effects. Its use should be combined with personal health and doctor's advice to ensure safety and effectiveness.