You chop an onion, rub the juice into your scalp because a video told you to, and spend the evening with watering eyes and hair that smells like a burger stand. There is a gentler way. Onion juice for hair growth works best when you dilute it, patch test it and rinse it well. These 12 steps walk you through it, so start at number one tonight.
1. Gather what you need and patch test
Set out one onion, a blender, a fine cloth, a bowl and a jar, then test a drop of juice on your inner arm. Wait a full day. If the skin turns red, itchy or puffy, onion is not for you, and you can stop here with no harm done. Onion juice is strong, so even a calm patch test does not guarantee a calm scalp. Open a window before you start, because the fumes sting eyes. Tie your hair back and wear an old top. Scrub the bowl and jar first, because any old residue makes the juice spoil faster.
2. Check who it suits
Skip onion juice if your scalp is sore, broken, scabbed or very sensitive, or if you have reacted to onions or garlic before. It also is not for children. A calm, healthy scalp handles it best. If your scalp is oily, you may like how clean it feels afterwards, and if it is very dry, shorten the time on your head. Do not use it right after coloring or relaxing your hair. If you are pregnant or nursing, pick a gentler routine instead, and keep onions in the kitchen. If your scalp is tender today, let it heal first and try onion another week.
3. Choose a fresh red or yellow onion
Pick a firm, fresh onion with dry papery skin and no soft spots or green sprouts. A red onion has a slightly milder smell and a deeper color, while a yellow one is easy to find. Either works, and one medium onion makes enough for two or three sessions. Press the skin. If it gives, the onion is old and will smell stronger and sour. Peel it and cut off the root end. Wash your hands afterwards with soap and a little lemon or baking soda to remove the smell. Smell it before you cut it, since a sharp sour smell means it has gone off.
4. Chill the onion first
Put the peeled onion in the fridge for thirty minutes before you cut it. A cold onion releases fewer fumes, so your eyes sting less. Cut it into quarters and keep a bowl of water nearby to rinse your fingers. Cooler juice also feels less harsh on your scalp. Use a glass or steel bowl, because the smell clings to plastic for weeks. A sharp knife helps too, since a blunt knife crushes the onion and releases more fumes. Work quickly and keep the window open. Wipe the board with a damp cloth right after, so the smell does not settle.
5. Blend with a splash of water
Put the chopped onion in a blender with two tablespoons of water and blend for thirty seconds. The water makes the juice milder, which is the gentlest way to start. Blend until it looks like a thick soup with no big chunks. Do not skip the water. Straight onion juice is far stronger and can burn a sensitive scalp. Pour it out right away and rinse the blender with warm water so the smell does not set in. A hand grater works too, if you do not own a blender. If the mix looks too thick to strain, add another splash of water.
6. Strain through a cloth or nut milk bag
Pour the blend into a clean cloth or nut milk bag and squeeze until the juice runs into a bowl. Pulp left behind in your hair is the main reason the smell lingers, so strain with care. You should get about a quarter cup of juice from one medium onion. Throw out the pulp or add it to the compost. Strain it twice if you see any specks. Smooth juice spreads thinly along the parting, while lumpy juice drips down your face and stings. Squeeze slowly, since a hard squeeze pushes tiny bits through the cloth.
7. Stir in aloe vera or a spoonful of honey
Mix one tablespoon of aloe vera gel or a teaspoon of honey into your juice. Aloe cools the scalp and softens the sting, and honey adds a little moisture. Stir until the mix is even. Use a pure aloe gel without perfume or alcohol. If you are not sure about the honey, leave it out and keep the aloe. This also thins the strength a touch, which helps if you notice any tingling. Make only what you will use today, because onion juice spoils quickly, even in the fridge. Smell the mix, and if it makes your eyes water, add another spoon of aloe.
8. Dab it along the part with cotton pads
Dip a cotton pad in the juice and dab it on your scalp, section by section, parting your hair every inch or so. Focus on the scalp rather than the lengths, because the ends will only smell and gain nothing. Keep it away from your eyes and your forehead. Use about two tablespoons for the whole head. Press gently with your fingertips for a minute, but do not scrub. If you feel burning, rinse straight away with cool water. Use a fresh pad when the first one gets messy. Wear thin gloves if your fingers are cut or dry, because onion juice stings broken skin.
9. Leave it on for fifteen to twenty minutes
Set a timer, tuck your hair under a shower cap, and leave the juice on for fifteen minutes the first time. Add a minute or two each session, but never go past twenty minutes. Longer does not give more growth, it gives more sting and more smell. A tingle is normal, but burning is not. If you feel any burning, rinse at once. Sit somewhere airy with a book or a show. A towel around your neck catches any drips. Look in a mirror, and rinse early if your scalp looks bright red.
10. Rinse well and finish with diluted vinegar
Rinse with lukewarm water for a full two minutes, shampoo twice, then pour over a cup of water with one tablespoon of apple cider vinegar. Wait a minute and rinse again. The vinegar rinse cuts the smell by a lot. Add a little conditioner to the lengths only. Hot water can make the odor bloom, so keep it lukewarm. If you still smell onion the next day, shampoo again and add a few drops of lemon juice to the final rinse. A damp head smells stronger than a dry one, so judge the smell when it is dry. Pat your hair dry with a towel instead of rubbing, since wet hair breaks easily.
11. Use it two or three times a week, no more
Choose two fixed days, such as Monday and Thursday, and use the juice for eight weeks before you decide. More often can dry and irritate the scalp, and an angry scalp sheds more. Skip a session if your scalp feels tender. Never apply it to broken skin. The mistake most people make is doing it every night because they are impatient. Hair grows about half an inch a month, so a fair test takes two months. Onion juice for hair growth is a slow test, so put the two days on your phone and let the weeks pass.
12. Know what you will likely notice
Look for a calm, clean scalp and perhaps a little less shedding, and take a parting photo every two weeks. Do not expect thick new hair in a month. Some women see baby hairs around the edges by week eight, and some see no change, which is normal. Stop right away if you see redness, swelling, bumps or constant itching. If your hair keeps falling out in clumps, see your doctor instead of adding more onion. A kitchen remedy is a small extra, not a cure. Be fair to yourself and keep the photos side by side.
Complete the Routine: Onion Juice for Hair Growth Made Gentle
Keep it simple with two sessions a week and a good rinse. For more kitchen ideas, read about fenugreek for hair growth and flax seeds for hair growth.
