What is Raak Cha-phlu?
Raak Cha-phlu (Piper sarmentosum) comes from the same leafy plant commonly eaten fresh in miang kham, a traditional Thai snack.
While the leaves are well-known in Thai cuisine, traditional Thai medicine makes use of the root to treat various ailments.
This plant belongs to the same family as black pepper, giving it a mildly pungent taste, though it is not overly spicy.
Benefits of Raak Cha-phlu
- Pain Relief & Muscle Aches: Traditionally used as a mild analgesic, especially for muscle and joint pain. The root is often pounded and applied as a poultice, or boiled and drunk.
- Reduces Swelling & Inflammation: Used for reducing localized swelling and for treating sprains or injuries.
- Stimulates Circulation: Lab studies found compounds that can fight some bacteria and oxidative stress.
- Antioxidant & Antimicrobial: Sometimes used for coughs, sore throat, or mild asthma in traditional decoctions.
- Respiratory Support: Sometimes used for coughs, sore throat, or mild asthma in traditional decoctions.
- Mild Diuretic: Believed to promote urination and relieve mild urinary complaints.

Precautions & Side Effects
- Generally Safe in Traditional Doses: Widely used in Thai folk medicine, but modern research on safety is limited.
- Pregnancy/Breastfeeding: Not enough data, avoid unless cleared by a professional.
- Possible Irritation: Topical use (on the skin) can rarely cause irritation or rash in sensitive folks.
- Allergies: Allergies: Rare, but those allergic to pepper family plants should be careful.
- Drug Interactions:You should consult a doctor if you are taking regular medication, as current scientific evidence remains insufficient.
Raak Cha-phlu (Piper sarmentosum)Raak Cha-phlu (Piper sarmentosum root) is a classic in Piper sarmentosum root is a traditional Thai herb commonly used to relieve pain, reduce swelling, and promote blood circulation. Some scientific evidence supports its antioxidant and antibacterial properties. However, it should not be used in excessive amounts and is not recommended for pregnant women or individuals with known allergies.
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