What not to put in hair
Honestly? People mess up their hair all the time without realizing it. You'd be surprised what folks slather on their heads thinking it'll help. Some stuff seems totally fine—maybe even smart—but ends up stripping every bit of natural oil, snapping strands, or making your scalp throw a fit. Knowing what to stay away from matters just as much as finding that perfect shampoo. This isn't about being precious with your hair routine, it's about common sense. Here's what's wrecking your hair without you knowing.
Can you put toothpaste on your hair?
Nope. Just don't. Toothpaste belongs in your mouth, not on your head. It's packed with abrasives like silica and detergents such as sodium lauryl sulfate—stuff that'll suck the moisture right out of your hair. You'll end up with straw-like strands that snap off. And those whitening agents? Hydrogen peroxide can lighten your hair patchy or straight up damage it chemically. If you want a good clean, grab a gentle ACV rinse or a sulfate-free clarifying shampoo instead. Trust me.
Is it safe to use mayonnaise as a hair mask?
I get why people try this—mayonnaise has eggs and oil, sounds nourishing, right? Wrong. The vinegar and preservatives in there mess with your scalp's pH big time. You're looking at irritation, dandruff, or this nasty greasy buildup that refuses to wash out. Super fine hair? It'll weigh it down like nobody's business, leaving you looking like you haven't showered in days. If you want protein, buy a real mask with hydrolyzed proteins or whip up an egg yolk with olive oil—skip the vinegar entirely.
What happens if you put dish soap in your hair?
This stuff is brutal. Dish soap is designed to annihilate grease on plates—imagine what it does to your scalp's natural oils. Instant dryness, frizz city, and your skin will probably get all red and angry. Keep using it and your hair fibers get weak, split ends show up, breakage follows. I mean, sure, in a pinch—like you spilled oil on your head—maybe. But never as your regular wash. Get a clarifying shampoo made for hair, or try bentonite clay once a month. That's it.
Should you put lemon juice in your hair?
People swear lemon juice lightens hair naturally. And yeah, it can. But it's a gamble. That citric acid? Super acidic—pH around 2. It literally eats away at your hair cuticle, leaving everything dry and brittle and frizzy. Under the sun? You'll get uneven, brassy, weird orange tones. Plus if your scalp's sensitive or has any tiny cuts, it'll sting like hell. Want safer lightening? Try chamomile tea rinses or a honey-cinnamon mix—and always patch test first. Always.
Common ingredients and products to avoid
| Ingredient / Product | Why to avoid it | Safer alternative |
|---|---|---|
| Sulfates (SLS, SLES) | Strip natural oils, cause frizz and dryness | Sulfate-free shampoos |
| Alcohol (SD alcohol, denatured alcohol) | Dries out hair, leads to breakage | Fatty alcohols (cetyl, stearyl) are okay |
| Petroleum jelly | Clogs pores, hard to wash out,ocates scalp | Light oils like jojoba or argan oil |
| Baking soda | Too alkaline, damages cuticle, causes frizz | Mild clarifying shampoo |
| Elmer's glue or school glue | Can cause hair loss when removed, contains toxins | Professional hair gel or mousse |
Checklist: What to avoid putting in your hair
- Toothpaste (abrasive, drying, can bleach hair)
- Dish soap (too harsh, strips natural oils)
- Mayonnaise (vinegar disrupts pH, hard to rinse)
- Lemon juice (acidic, damages cuticle, uneven lightening)
- Baking soda (alkaline, causes frizz and breakage)
- Elmer's glue or school glue (toxic, hard to remove)
- Petroleum jelly (clogs pores, buildup)
- Denatured alcohol (drying, damaging)
- Sulfates (harsh detergents)
- Bleach or hair dye not meant for home use (chemical burns)
Frequently asked questions
Can I put apple cider vinegar in my hair?
Yeah, but you gotta dilute it—like one part ACV to three or four parts water. Straight up, undiluted? Way too acidic, will wreck your hair. Use it after shampooing to clear buildup and add some shine. Skip it if your scalp's cranky or you've got open cuts.
Is coconut oil safe for all hair types?
Mostly, yeah. But if your hair's fine or thin, it might be too heavy—you'll look greasy fast. It's best as a pre-wash thing or deep conditioner. And if your hair's weird about protein, go easy—it can make things stiff and weird.
Can I use hairspray every day?
You can, but you'll get buildup, dryness, and breakage over time. If you're spraying daily, go for a lightweight, alcohol-free one and wash regularly. Dry shampoo can help you stretch between washes without all that gunk.
What about using beer as a hair rinse?
Beer can give you temporary volume and shine—thanks to the protein. But there's alcohol and sugar in there too, which dries hair out or attracts dirt. Keep it to once a month max, and rinse like crazy. Flat, diluted beer is your safest bet.
Short Summary
- Avoid harsh household items: Toothpaste, dish soap, and baking soda can strip moisture and damage hair fibers.
- Skip risky DIY treatments: Mayonnaise, lemon juice, and beer often cause more harm than good due to pH imbalance or buildup.
- Watch for damaging ingredients: Sulfates, denatured alcohol, and petroleum jelly lead to dryness, frizz, and scalp issues.
- Use safe alternatives: Choose sulfate-free shampoos, oils, and professional products designed for hair care.