Khas (Vetiver): The Cooling Root Behind Khus Sharbat and Vetiver Oil
Khas in English is vetiver: a tall tropical grass whose fragrant roots flavour khus sharbat, scent soaps and perfume, and once cooled whole houses as wetted screens in the doorway. It has nothing to do with khashkhash (poppy seed), even though “khas khas” is sometimes used for both. Here is what the root is, what “cooling” honestly means, what vetiver oil can and cannot do, and how to buy roots that are not mouldy.
Before you buy
- Names: vetiver, khus or khas root, khas ki jar, cuscus grass (old English); ushira (Sanskrit); arq-e-khas for the distilled water
- Plant: Chrysopogon zizanioides, formerly Vetiveria zizanioides, a grass native to India
- Part used: the fine, deep, aromatic roots, dried; the oil is distilled from them
- Smell and taste: earthy, woody, slightly sweet and green; a wet-soil note
- Safety flag: MEDIUM, mainly for the concentrated oil and for mouldy roots
- Price signal: roots are cheap; genuine vetiver oil is expensive because the yield is small
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What khas is, and the poppy seed it is not
Vetiver is a clumping grass that grows two metres tall, with roots that plunge straight down instead of spreading. Those roots are the valuable part. Washed, dried and bundled, they hold their scent for months and carry a complex mix of heavy aromatic molecules, with khusimol and the vetivones among the main ones. Perfumers use the oil as a base note in a large share of men’s fragrances. South Asian homes use the root itself.
The name trap: in Urdu and Hindi “khas khas” or “khus khus” can mean the grass root, but “khashkhash” and in many kitchens “khas khas” also mean poppy seeds, the tiny white seeds ground into kormas and halwa. They are unrelated. Poppy seed is a food seed with its own rules; vetiver root is an aromatic you steep, not eat. When a recipe calls for khas khas, read the rest of it: if it is ground into a gravy, it means poppy seed; if it is tied in muslin and steeped in syrup or water, it means vetiver.
Why khas is called cooling, and what that really means
Unani and Ayurvedic texts both class khas as cold and dry, a herb for the hot season, for “heat” in the body, thirst, burning urine and heat headaches. Hakeems prescribed arq-e-khas and sharbats built on it in summer, and Ayurveda’s ushira sits in cooling formulas and in water pots. It is one of the most consistent cooling herbs across both systems.
Here is the honest physics. Khas does not lower body temperature as a drug would. It cools in three practical ways. First, evaporation: a wet khas screen (the khas ki tatti) or a khas-lined cooler pad pulls heat out of air passing through it exactly as any wet cloth does, and the root adds a scent that makes the damp air smell fresh instead of musty. Second, the drink: a cold khus sharbat is mostly cold water and sugar, which is what a hot, thirsty body wants, and the green-earthy flavour reads as “cool” to the brain the way mint does. Third, a clay pot with a root bundle in it keeps water fragrant and slightly earthy while the pot does the evaporative cooling.
None of this is a trick; it is good design. But it means khas does not fix heat exhaustion or heatstroke, which are emergencies needing shade, water, cooling of the skin and medical help. For the hot-and-cold food framework these traditions use, see garam and thanda foods explained.
Khus sharbat: what the colour tells you
The drink is a sugar syrup in which vetiver root (or a distillate of it) has been steeped, diluted with cold water or milk. Our khus and sandal sharbat recipe gives the method, so here is only what matters for buying a bottle. Real vetiver extraction gives a pale amber to brown liquid. It is never green. The vivid emerald of commercial khus syrup comes from added colour: label after label lists INS 102 (tartrazine) and INS 133 (brilliant blue), the yellow and blue dyes that make green, often alongside “natural and artificial flavouring substances” and only a small percentage of actual khus distillate.
The label check: green means dye, not more khas
Turn the bottle round. If the ingredients list a colour number (INS 102, INS 133, or “permitted colours”) and “khus distillate 1 percent” or similar, you are buying coloured, flavoured sugar syrup with a hint of root. That is fine as a treat, but it is not the herbal drink grandmothers made, and a neon green does not mean a stronger sharbat; it means more dye. A home-made syrup from roots will be brownish and faintly cloudy, which is the real colour of khas. People with a known sensitivity to tartrazine, including some with asthma or aspirin sensitivity, should read for INS 102 specifically.
Vetiver oil for skin, hair and sleep: the small-study reality
Vetiver essential oil is steam-distilled from the roots and sells at a high price because a lot of root gives very little oil. Claims attached to it: calming and sleep-inducing, good for acne and oily skin, helps hair growth, heals scars.
What the research actually holds: a 2025 review of the plant’s pharmacology concludes that most evidence comes from laboratory and animal work with limited human data. The sleep and anxiety claim rests mainly on a 2015 rat study in which inhaling the oil produced a calming effect on a maze test, similar in direction to diazepam; that is interesting, and it is not a human trial. Antimicrobial activity against acne-related and skin bacteria is shown in dishes, not on faces. There is no evidence for hair growth; vetiver oil in a hair oil is there for scent. Scar claims are tradition and marketing.
Worth it: as a fragrance, in a diffuser or a well-diluted massage oil, if you like the smell; a scent you find calming is a fair bedtime routine. Unproven but low risk when diluted: a few drops in a carrier oil for oily skin. Skip: any product telling you to apply it neat, swallow it, or use it on a baby.
Household dilution in plain words: for a massage or skin oil, keep the essential oil at about one part in a hundred, which is roughly a single drop stirred into a teaspoon of coconut, almond or sesame oil. Patch test on the inner arm for 24 hours. Never neat on skin, never in the mouth, never on babies or small children, and treat it as a precaution to avoid in pregnancy because no safety data exist for it. For a gentler fragrant water, the rose water guide covers a far better-studied cousin.
Buying and storing loose roots
Pansari roots are sold as a tangled bundle, grey-brown, often with dry soil still clinging. Three faults are common: soil, grey or white mould at the cut ends, and roots so old the scent has gone. Smell the bundle. Good khas smells sweet, earthy and clean, like a cool riverbank; a musty, sour or cellar smell means mould, and a mouldy root should not go into anything you drink.
- Rinse: swish the bundle in a basin of cold water, rubbing the strands to loosen soil. Change the water two or three times until it runs clear.
- Dry fully: spread the roots on a cloth in sun or a breezy shade for a day or two until they are crisp again; a damp bundle moulds within days.
- Trim: cut away any strands with grey or white fuzz or dark soft patches before storing.
- Store: an airtight jar or tin in a cool, dry cupboard, away from the stove. The scent lasts months; when a root no longer smells of anything after a rub between the fingers, it is done.
- Use: a small bundle, about a tablespoon of roots, tied in muslin, steeped in a litre of drinking water in a clay pot, changed every day or two; or steeped in syrup as the recipe post describes.
A tightly sealed bag is the main defence against both moisture and scent loss; refrigeration is not needed for dry roots and a fridge adds condensation each time the bag opens.
Growing khas in Pakistan and India
Vetiver grows easily across the Punjab, Sindh, Uttar Pradesh and the south, which is why governments plant it on canal banks and slopes: its deep roots hold soil against erosion. Farmers who grow it for perfumery dig roots after a year or more. If you have garden space, a clump will give you roots for the water pot without buying any, and the grass itself asks for little beyond water.
Vetiver essential oil is for the skin or the air only, and only diluted: swallowing any essential oil can cause vomiting, drowsiness and, in children, serious poisoning, so keep bottles out of reach and call a doctor or poison centre if a child drinks any, bringing the bottle. Do not use the oil on babies or toddlers, and avoid it in pregnancy and breastfeeding as a precaution. Patch test every new product. Mouldy roots can carry fungal toxins; discard rather than rinse a bundle that smells musty. Khus sharbat is sugar syrup, so people with diabetes should count it as a sweet, and the dyes in commercial bottles matter to anyone with a tartrazine sensitivity. Khas does not replace medical care for heat illness: very hot skin, confusion or collapse in the heat is an emergency. For any medicinal use of the root, the pack or a qualified practitioner sets the amount.
Khas and vetiver questions people search
Khas in English?
Vetiver. The plant is the grass Chrysopogon zizanioides (older books say Vetiveria zizanioides) and the part used is its dried, fragrant root. Very old English texts call it cuscus grass.
Khas khas aur khashkhash mein kya farq hai?
Khashkhash is poppy seed, a tiny white cooking seed. Khas (sometimes also called khas khas) is vetiver grass root, an aromatic you steep. The names overlap in speech but the plants are unrelated; recipes that grind “khas khas” into gravy mean poppy seed.
Khas ke fayde aur nuksan?
Benefits: a pleasant, genuinely refreshing scent and flavour for summer water and sharbat, and real evaporative cooling in screens and coolers. Harms are few for the root; the concentrated oil must be diluted, never swallowed, and kept from children, and mouldy roots should be thrown away.
Vetiver in Urdu?
Khas or khus; the root is khas ki jar, and the old window screen made from it is khas ki tatti. Arq-e-khas is the distilled water used in Unani.
Khas ki jar pani mein dalne ke fayde?
A root bundle in a clay pot gives the water a fresh, earthy flavour and scent, and the clay pot itself cools by evaporation. It is a pleasant way to drink more water in summer; it does not change the water’s chemistry in any medically meaningful way.
Vetiver benefits for skin?
In the lab the oil inhibits some skin bacteria, and diluted in a carrier oil it is a tolerable fragrance oil for oily skin. There is no human evidence for acne, scars or pigmentation. Always dilute and patch test.
Vetiver benefits for hair?
None beyond scent. Vetiver oil in a hair oil makes it smell good; it has not been shown to affect hair growth or dandruff in people.
Does vetiver make you sleepy?
In a rat study, inhaled vetiver oil had a calming effect; there is no good human trial. Many people find the smell relaxing, which makes it a reasonable bedtime scent, not a sleep medicine.
Vetiver oil side effects?
Skin irritation or allergy when used neat or too strong, and poisoning if swallowed, especially in children. Dilute to about one drop per teaspoon of carrier oil, patch test, and avoid in pregnancy as a precaution.
Khas sharbat benefits?
It is a cold, sweet, flavoured drink that rehydrates and tastes refreshing, which is the whole benefit. It is sugar syrup, so treat it as a sweet, and check the label for added colours.
Why is khus syrup green?
Because of added dye, usually tartrazine (INS 102) plus brilliant blue (INS 133). Real vetiver extract is pale amber to brown. A home-made syrup from roots is never emerald green.
How to store khas roots?
Rinse off soil, dry fully in sun or breeze, trim any mouldy strands, and keep in an airtight jar in a cool, dry cupboard. The scent lasts months; the fridge is not needed and adds damp.
Does vetiver grass grow in Pakistan?
Yes, across Punjab and Sindh and much of India. It is planted on canal banks and slopes because its deep roots hold soil, and a garden clump will give you roots for the water pot.
Bottom line
Khas is a fragrant grass root, not a poppy seed, and it cools the old-fashioned way: through evaporation, cold water and a scent the brain reads as fresh, not through any drug-like effect on body temperature. Its oil is a fine perfume ingredient with claims that outrun the small, mostly animal evidence, so dilute it, never swallow it, and keep it from children. Buy roots that smell sweet and clean, dry them well, and read the sharbat label before you pay extra for green. More summer traditions, checked honestly, in Desi Remedies and the sharbat-e-bazoori recipe.
Sources
- Pharmacological and Therapeutic Potential of Chrysopogon zizanioides (Vetiver): A Comprehensive Review. Biomolecules, 2025. PMC12467945
- Saiyudthong S, Pongmayteegul S, Marsden CA, Phansuwan-Pujito P. Anxiety-like behaviour and c-fos expression in rats that inhaled vetiver essential oil. Natural Product Research, 2015. PMID 25553641
- Review of Antimicrobial and Other Health Effects in 5 Essential Oil Producing Grass Species. Journal of Dietary Supplements, 2023. PMID 34219586
- Shree Guruji Khus Sharbat, product label (ingredients: distillate of khus 1%, colours INS 102 and INS 133). shreeguruji.com