Educational information, not medical advice — ask your doctor or midwife.
Parūṣaka is the small purple fruit of a shrub called Grewia asiatica. In India most people know it as phalsa. Ayurveda treats it as a cooling food and a mild tonic.
People eat it in the hot months for thirst, heat and a burning feeling in the body. It is eaten fresh, or crushed into a sweet-sour drink. The bark and leaves have older uses too.
The evidence here is thin. Phalsa has a long, clear place in Ayurveda, but human trials are few. A long history of use is not proof that a thing works, and that gap applies to every use listed on this page.
No one has shown how phalsa works in the body. What follows is a best guess from lab work.
The fruit holds a lot of anthocyanins, the dark purple plant colours. In test tubes these mop up free radicals, which are unstable bits that can harm cells. Whether that does anything useful inside a person is not known.
Ayurveda calls the fruit sweet, sour and cooling. Healers use it to calm pitta, the body's heat and fire energy. That is a way of sorting foods by feel, not a proven body process.
The fruit is also mostly water, with sugar and fibre. That is the simplest reason it eases thirst and keeps the gut moving.
Fresh fruit is the main form. It is small, round and dark, and is sold by weight in Indian markets in summer.
Other forms you may meet: chilled phalsa juice or sherbet, dried fruit powder, jam, and a water boil (decoction) made from the bark. Leaves are used as a paste on the skin in some village practice.
There is no standard extract and no agreed strength for any of these.
Phalsa is an old classical Ayurvedic food-medicine. It appears in the Charaka Samhita and Sushruta Samhita, texts written more than 1,500 years ago.
It is grouped with the sweet-sour fruits used to cool the body and quench thirst. Unani practice in South Asia uses it in much the same way. It stays a common summer street drink across northern India today.
See a doctor if burning when you pass urine, fever, or belly pain lasts more than two days, or if you see blood in your urine. Get help the same day if you feel weak, very thirsty and are passing a lot of urine, as this can mean high blood sugar. Call emergency services if you get swelling of the lips, face or throat, a spreading rash, or trouble breathing after eating the fruit.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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