Cleavers Tea: The Traditional Lymph Herb, Reviewed
Cleavers is the sticky weed that clings to your clothes, and herbal shops often call it a lymph cleanser. Here is an honest look at its history, the thin evidence, and how to brew it safely.
If you have walked along a hedge in spring and found green strands stuck to your sleeves, you have met cleavers. Also called goosegrass or sticky willy, Galium aparine is covered in tiny hooked hairs that let it climb and cling to almost anything.
In herbal shops and online, cleavers is often sold as the lymph herb, said to drain or cleanse the lymphatic system. This guide explains where that reputation comes from, what research actually exists, how cleavers tea is traditionally made, and why you should be careful with the big claims.
How cleavers has been used
Cleavers has a long folk history across Europe, Asia and the Americas. A 2020 research paper on the plant notes that its infusions were traditionally used as a diuretic, as a tonic and for their astringent and soothing qualities, and that it was applied to the skin for skin complaints, infections and wounds.
The idea of cleavers as a lymph herb comes from this traditional herbal practice rather than from medical research. Herbalists have long grouped it with plants thought to support the body's natural defenses.
Cold-Infused Cleavers Water
You need
- fresh young cleavers tops, rinsed1 large handful (about 30 g / 1 oz)
- cold drinking water500 ml (2 cups)
- slice of lemon or cucumber, optional1
Method
- Rinse the cleavers well in a bowl of cold water and check for insects, grass or other plants.
- Roughly chop the stems and leaves with scissors.
- Put them in a clean glass jar and pour the cold water over them.
- Cover and leave in the fridge for 4 to 8 hours, or overnight.
- Strain, add lemon or cucumber if you like, and drink within 24 hours, keeping it chilled.
Tips
- The flavor is mild, green and a little like cucumber or pea shoots.
- Start with a small glass to see how it agrees with you.
- If you prefer a warm drink, pour water just off the boil over the chopped fresh tops and steep for 10 minutes.
What the evidence says
The evidence is very limited. The most relevant modern study tested cleavers infusions on human blood cells in the laboratory and found that the extracts stimulated immune cells and showed antioxidant activity in test tube assays. No people drank any tea in this study.
The authors concluded that their findings partly supported the traditional use of cleavers on the skin, and they said animal studies were still needed. There are no clinical trials showing that cleavers tea drains, cleanses or improves the lymphatic system in people.
It also helps to know what the lymphatic system does. Cleveland Clinic explains that it is a network of vessels and organs that returns extra fluid from your tissues to your blood and helps fight infection. Lymph is moved along mainly by the squeezing of nearby muscles and the pulsing of nearby arteries, which is why regular movement matters far more than any herb.
Picking and preparing cleavers
Cleavers is easy to recognize: long, weak, square stems with rings of six to eight narrow leaves, all slightly sticky to the touch. Only pick it if you are completely sure of the plant, and choose clean spots away from roads, sprayed gardens and dog-walking paths.
Young spring growth, before the small round seeds form, is the traditional choice. Herbalists usually prepare it as a cold infusion, steeping the chopped fresh plant in cool water, because many find the fresh plant gives a better flavor than dried.
Questions people ask
Does cleavers tea really clean the lymphatic system?
There is no good evidence that it does. The research so far is from laboratory tests on cells, not from people drinking the tea. Moving regularly and drinking enough fluids are the practical ways to support normal lymph flow.
Can I use cleavers for lymphoedema?
No. The NHS says lymphoedema is managed with compression garments, skin care, exercise and specialised massage, guided by a lymphoedema team. Herbs are not part of that treatment.
Can I dry cleavers to use later?
You can dry it in an airy place out of direct sun, but it shrinks a lot and many people find the dried herb has less flavor. Store it in a sealed, labeled jar away from heat and light.
Sources
- Immunomodulatory Activity and Phytochemical Profile of Infusions from Cleavers Herb — Molecules (PubMed)
- Lymphatic System — Cleveland Clinic
- Lymphoedema — NHS
- Using Dietary Supplements Wisely — NCCIH
This article is for general information only and is not medical advice. Herbs can interact with medicines and health conditions. Talk to a doctor or pharmacist before trying a herbal remedy, especially if you are pregnant, breastfeeding, giving it to a child, or taking any medication.
