Parsley water is a simple herbal infusion linked to mild diuretic effects, antioxidant support, and a surprisingly rich nutrient profile. Made by steeping fresh or dried parsley in hot water, it has been used in folk medicine for centuries to support kidney function, ease bloating, and deliver vitamins that parsley is naturally packed with. Modern research, mostly from animal and small human studies, is starting to explain why some of these traditional uses hold up.
How to Make It
Parsley water is just parsley tea by another name. Add about 2 tablespoons of chopped fresh parsley to a cup of hot water and let it steep for 5 to 7 minutes. Strain and drink. You can also use dried parsley, though fresh leaves tend to have a brighter flavor and higher concentrations of volatile oils. Some people make a cold infusion by letting parsley sit in water overnight in the refrigerator, which produces a milder taste but extracts fewer compounds than hot water does.
Nutrient Content
Fresh parsley is unusually nutrient-dense for an herb. It’s very rich in vitamin A and potassium, and moderately rich in vitamin C, calcium, and folate. A single serving delivers 56 mg of vitamin C and 307 mg of potassium. When you steep parsley in water, the water-soluble vitamins (C and folate especially) leach into the liquid, giving you a low-calorie way to pick up micronutrients you might otherwise miss.
Parsley is also one of the richest dietary sources of a plant compound called apigenin, a type of flavonoid with strong antioxidant activity. A small human crossover trial found that when participants ate a diet supplemented with parsley providing roughly 4 mg of apigenin per day, their levels of key antioxidant enzymes in red blood cells increased compared to their baseline diet. That means the antioxidant compounds in parsley are bioavailable enough to measurably shift the body’s defenses against oxidative stress.
Kidney and Urinary Support
The most studied benefit of parsley water is its effect on the urinary system. In animal research published in the American Journal of Clinical and Experimental Urology, parsley extract significantly increased urine volume and raised urinary pH compared to controls. The diuretic effect appears to work by inhibiting a sodium-potassium pump in the kidneys, which reduces how much sodium and potassium gets reabsorbed, pulling more water into the urine.
This matters for kidney stone prevention. The same study found that parsley-treated animals had lower levels of calcium oxalate crystals, the most common building block of kidney stones. Several mechanisms seem to work together: parsley reduced urinary calcium excretion, increased urine pH (making the environment less favorable for crystal formation), and appears to interfere with oxalate production in the liver. Parsley also contains magnesium, which can bind to oxalate in the intestines and reduce the amount that reaches the kidneys in the first place.
Higher urine pH also decreases how much citrate the kidneys reabsorb, leaving more citrate in the urine. Citrate is a natural inhibitor of stone formation, so this adds another protective layer. If you’re prone to calcium oxalate stones, parsley water’s combination of increased fluid intake and these biochemical effects could be worth discussing with your care team.
Digestive Benefits
Parsley has long been used as a carminative, meaning a remedy for gas and bloating. The volatile oils concentrated in parsley (more so in the seeds than the leaves, but present throughout the plant) have mild laxative properties that may help move things along in the digestive tract. Drinking parsley water after a meal is a traditional practice in several Mediterranean and Middle Eastern cultures, and while large clinical trials are lacking, the mechanism is consistent with how other volatile-oil-rich herbs like fennel and caraway work to ease intestinal discomfort.
Blood Sugar Effects
Animal research has found that parsley extract can lower blood glucose levels in diabetic rats compared to untreated diabetic controls. The study concluded that parsley helped maintain blood sugar balance, though it did not regenerate the insulin-producing cells in the pancreas. This suggests parsley may support blood sugar regulation through other pathways, possibly by influencing how glucose is absorbed or used, rather than by restoring insulin production. Human studies confirming this effect are still limited, so parsley water shouldn’t replace any blood sugar management strategy, but it’s a reasonable addition to an overall balanced diet.
Skin Health
Parsley’s benefits extend beyond drinking. In a clinical study of 32 people with dermatitis, applying a parsley extract ointment significantly reduced redness, skin thickening, and scaling, with scaling showing the most dramatic improvement. Separate research found that parsley extract demonstrated anti-inflammatory, skin-brightening, and wrinkle-reducing effects, positioning it as a functional cosmetic ingredient. One randomized clinical trial even found that topical parsley was effective at reducing epidermal melasma (dark patches on the skin) compared to hydroquinone cream, a standard treatment.
Some people use cooled parsley water as a facial rinse or compress for these reasons. The vitamin C and apigenin content likely contribute to the skin effects, since both support collagen integrity and reduce inflammation.
Who Should Be Cautious
Parsley contains compounds called apiole and myristicin, concentrated mainly in the seeds and essential oil. These act as uterine stimulants. Parsley has historically been classified as an emmenagogue, meaning it can promote menstrual bleeding. In concentrated forms, it has been associated with miscarriage risk. Drinking a cup of parsley leaf tea is very different from ingesting parsley seed oil, but pregnant women should avoid consuming parsley in amounts beyond normal culinary use.
Parsley is also extremely high in vitamin K, which plays a central role in blood clotting. For people taking blood-thinning medications like warfarin, even moderate parsley consumption can shift clotting markers. One documented case involved a 72-year-old man on warfarin whose clotting index rose to dangerous levels after years of taking herbal products containing parsley. If you’re on anticoagulants, keep your parsley intake consistent from day to day so your medication dose stays calibrated.
Because parsley water acts as a mild diuretic, drinking large quantities could theoretically lower potassium or affect fluid balance if you’re also taking prescription diuretics. For most people, one to two cups a day is a reasonable amount that stays well within safe territory.