Astragalus root is considered a Superior herb in Chinese Medicine.
Superior* herbs are those that can be used regularly and over long periods of time to encourage and facilitate health. Also known as tonic herbs, superior herbs can be thought of as Food Grade medicine. Food as in the stuff you eat to stay alive.
These Food Grade, Superior, Tonic medicines are herbs that are high in vitamins, minerals and phytochemicals that are needed and used in a wide array of physiological activities in your body. They’re also low in unwanted side effects. Like kale and carrots, they can be used safely, with a wide dosage range without making you sick.