Sambong

What is Sambong?

Sambong (Blumea balsamifera) is a tall aromatic shrub found throughout the Philippines, Southeast Asia, and parts of East Asia. It holds a notable distinction as one of only a handful of plants officially approved by the Philippine Department of Health and included in the national formulary as a recognized herbal medicine. The plant's leaves are the primary medicinal part, used both as teas and standardized tablet preparations.

How does Sambong work?

Sambong's key active compound, l-borneol (Blumea camphor), is thought to interfere with calcium oxalate crystal formation and aggregation — the building blocks of the most common type of kidney stones. It also appears to have a mild diuretic action, potentially increasing urine output and helping flush the urinary tract. Additional flavonoid content is believed to contribute anti-inflammatory and antimicrobial effects that may support urinary health.

What forms does Sambong come in?

The most traditional form is a tea brewed from dried sambong leaves, which is still widely used in rural Philippines. Standardized tablet preparations (most notably Rowatinex-adjacent products and the Philippine DOH-approved Blumea tablet) offer consistent dosing for kidney stone management. Capsules and liquid extracts are also available through herbal supplement retailers.

Where it comes from:

Sambong has been used in Philippine folk medicine for generations to treat kidney and bladder complaints, fever, and respiratory conditions. Its integration into the Philippine national health system — through formal government review and DOH approval — makes it one of the rare traditional herbal remedies to bridge folk practice and government-endorsed clinical use. It is also used in Vietnamese and Indonesian traditional medicine for similar purposes.

What does Sambong help with?

• Kidney stones: Sambong has been traditionally used for preventing and helping manage calcium oxalate kidney stones, and this is its most longstanding documented application. Its active compound l-borneol is thought to slow the formation and clumping of stone crystals, and its mild diuretic effect may increase urine flow to help flush the urinary tract. This traditional use is the primary reason the Philippine DOH officially recognizes it as an approved herbal medicine, though supporting evidence remains largely observational and preliminary.
• Fluid retention (edema): Sambong has been traditionally used as a gentle natural diuretic, with practitioners long noting that it may encourage the kidneys to excrete more water and sodium. In traditional practice, it is used for mild swelling in the legs, feet, or hands that comes from fluid buildup rather than a serious underlying medical condition.
• Urinary tract infections (UTIs): Sambong is traditionally used as a supportive remedy for urinary tract discomfort. The antimicrobial compounds in its essential oils and its diuretic flushing action are thought to may help reduce bacterial load in the urinary tract. In traditional practice, it is used alongside, not as a replacement for, conventional UTI treatment.
• High blood pressure (mild): Because sambong is thought to increase urine output and may help the body shed excess sodium and fluid, it has been traditionally used in the context of mild hypertension. Any blood-pressure-lowering effect is considered gentle, and supporting evidence is preliminary, coming mainly from animal studies and observational reports rather than clinical trials.
• Dysmenorrhea (painful periods): Traditional practice in the Philippines has long included drinking sambong tea for menstrual cramps. Some anti-inflammatory activity from its flavonoid content may help reduce uterine cramping, though this use is based on traditional and observational accounts rather than formal clinical trial evidence.
• Respiratory infections and colds: In traditional practice, steam inhalation with sambong leaves or drinking the tea is used to ease coughs, colds, and sinus congestion. The aromatic camphor and cineole compounds are thought to have mild decongestant properties, though this use is supported largely by traditional use and observational experience rather than clinical studies.
• Wound healing (topical): Crushed sambong leaves applied to the skin are a longstanding folk remedy for minor cuts and skin infections. The tannin and flavonoid content is thought to provide mild antimicrobial and astringent effects that may support wound closure and help prevent infection, based on traditional use and preliminary in vitro observations.
• General urinary tract health: In Filipino folk practice, regular low-dose sambong tea has traditionally been used to help keep the urinary tract clear, potentially reduce the risk of stone recurrence, and support healthy kidney function — especially in people prone to stone formation. This use is based on traditional and observational practice rather than verified clinical evidence.

What can Sambong help prevent?

• Recurrence of calcium oxalate kidney stones (with regular use after initial stone passage)
• Fluid-related blood pressure spikes in salt-sensitive individuals

Which foods are rich in Sambong?

Sambong is an herbal plant, not a nutrient found in common foods. However, a kidney-stone-preventive diet strongly supports sambong's goals: drink plenty of water (the single most effective kidney stone prevention measure), eat foods rich in citrate like lemons and oranges (citrate naturally inhibits stone formation), reduce sodium and animal protein, and include magnesium-rich foods like leafy greens, seeds, and legumes. Avoiding very high oxalate foods like spinach, beets, and nuts in excess may also reduce calcium oxalate stone risk.

What are the side effects of Sambong?

• Mild stomach upset or nausea (most common, especially on empty stomach)
• Increased urination (expected diuretic effect, not harmful)
• Allergic reactions in people sensitive to plants in the Asteraceae/daisy family
• Possible electrolyte imbalance with prolonged high-dose use
• Not recommended in pregnancy

Good to know:

Sambong has a strong safety record in traditional use. Most people tolerate it well at standard doses. It is not recommended during pregnancy due to its diuretic and potentially uterine-stimulating effects, and caution is advised while breastfeeding.

How much Sambong should you take?

• Recommended daily: Standardized tablet: 500 mg, 2–3 times daily (Philippine DOH approved dosage for kidney stones). Tea: 1–2 cups daily brewed from 6–10 grams of dried leaves.
• Best time of day: Spread doses throughout the day to maintain steady diuretic effect; take last dose no later than early evening to avoid nighttime urination disrupting sleep.
• With or without food: Best taken with or shortly after a meal to minimize stomach upset.
• Time to effect: Diuretic effect within hours; kidney stone size reduction typically assessed at 4–12 weeks of consistent use.
• How long to take it: For kidney stone management, courses of 4–12 weeks are typically used. For prevention, lower ongoing doses may be appropriate. Take breaks periodically (e.g., 1 month on, 1–2 weeks off) rather than indefinite daily use, and consult a healthcare provider for ongoing kidney stone management.