Making astragalus tea is simple: simmer dried astragalus root slices in water for 20 to 30 minutes. Because the root is extremely fibrous, a long simmer (called a decoction) extracts far more beneficial compounds than just steeping it like a regular tea bag. A typical daily amount is 9 to 30 grams of dried root, which translates to roughly a small handful of slices per pot.
Basic Decoction Method
Astragalus root comes as thin, dried slices or strips that look like tongue depressors. You can find them at Asian grocery stores, herbal shops, or online. To make a basic tea, place 10 to 15 grams of dried root slices (about 5 to 7 slices) into a pot with 3 to 4 cups of water. Bring the water to a boil, then reduce to a low simmer and cover. Let it cook for 20 to 30 minutes.
After simmering, strain out the root pieces and drink the liquid warm. You’ll notice that most of the root material stays intact in the pot. This is normal. Astragalus is one of the most fibrous medicinal roots, so even prolonged boiling leaves behind a lot of solid material. The good news is you can reuse the same slices for a second batch. Just add fresh water and simmer again, though the second brew will be milder.
If you want a stronger tea, increase the simmering time to 45 minutes or even an hour, or use more root. In traditional Chinese medicine, daily doses of 15 to 30 grams are standard for general wellness. Short-term therapeutic doses can go as high as 60 grams per day, though amounts that high are typically guided by a practitioner.
What It Tastes Like
Astragalus tea has a mildly sweet, slightly earthy flavor. In Chinese medicine, the root is formally classified as “sweet in flavor” with a warm nature. It’s pleasant enough to drink plain, but it won’t knock you over with flavor. Think of it as a light, subtly sweet broth rather than a bold herbal tea.
If you find the taste too mild or want more complexity, jujube dates (red dates) are the most traditional pairing. Toss 3 to 5 dried jujubes into the pot along with the astragalus slices. They add natural sweetness and a fruity depth. Goji berries, ginger slices, and a drizzle of honey also work well. Some people add a cinnamon stick for warmth. You can also combine astragalus with other dried roots and herbs to create a more complex blend, though the root holds up fine on its own.
Why People Drink It
Astragalus has been used in Chinese medicine for centuries, primarily as an immune-supporting herb. The root contains polysaccharides, flavonoids, and saponins that appear to activate several types of immune cells. Astragalus polysaccharides in particular can enhance the function of macrophages (cells that engulf pathogens), natural killer cells, and both T and B lymphocytes, which are central players in your body’s defense system. These compounds also stimulate the production of cytokines, the signaling molecules that coordinate immune responses.
One study measuring the body’s response after a single dose of astragalus found a measurable increase in circulating immune cells within 8 to 12 hours, with platelet counts rising as early as 4 hours. These levels returned to baseline within 24 hours, which suggests the immune-boosting effect is real but temporary with a single dose. Regular daily consumption is the traditional approach for sustained benefit.
Storing Leftover Tea
If you brew a large batch, refrigerate whatever you don’t drink right away in a sealed container. Brewed astragalus tea stays good in the fridge for up to 48 hours. After that, both the flavor and safety decline. Reheat gently on the stove or in a microwave. Don’t leave it sitting out at room temperature for more than a couple of hours.
Dried astragalus root itself keeps for a long time. Store unused slices in an airtight bag or jar in a cool, dry place away from sunlight. Properly stored dried root maintains its potency for a year or more.
Who Should Avoid It
Astragalus stimulates the immune system, which makes it a poor choice for anyone with an autoimmune condition like lupus, rheumatoid arthritis, or multiple sclerosis. Revving up an already overactive immune system can worsen symptoms. For the same reason, astragalus can interfere with immunosuppressant medications, the drugs prescribed after organ transplants or for autoimmune diseases. If you take any medication that deliberately dials down your immune response, skip the astragalus tea.
For most other adults, astragalus root tea at standard doses (up to 30 grams of root per day) is considered safe. Side effects are uncommon but can include mild digestive upset. Pregnant or breastfeeding women should check with their healthcare provider first, as safety data for those groups is limited.
Quick Recipe Summary
- Root: 10 to 15 grams of dried astragalus slices (about 5 to 7 pieces)
- Water: 3 to 4 cups
- Method: Bring to a boil, then simmer covered for 20 to 30 minutes
- Optional additions: Jujube dates, goji berries, ginger, cinnamon, honey
- Storage: Refrigerate in a sealed container, drink within 48 hours
- Reuse: Root slices can be simmered a second time with fresh water