How to Read Hair Care Ingredient Lists: What Actually Matters

TL;DR:

• Ingredients are listed by concentration — the first five make up most of the product
• "With argan oil" on the front means nothing if argan oil is near the bottom of the list
• Silicones aren't bad — they work, and buildup is fixed with a monthly clarifying wash
• Natural doesn't mean better — judge ingredients by what they do, not where they come from
• Marketing claims on the front are optional. The ingredient list on the back is the truth.

The front of a hair care bottle is marketing. The back is information. Most people read the front and ignore the back — which is exactly what brands want. Spend thirty seconds reading the ingredient list and you'll make better decisions and waste less money. Here's what to look for.

Meet the experts:
Royston and Warren at Cavendish Square — Judy, head trainer — Lewis, owner — Jackie at Gardens Centre — Debbie and Nikí at V&A Waterfront — Danny and Charlene at Canal Walk — Lynette, Samantha and Dominique at Constantia Village

01 — Ingredients Are Listed by Concentration

The most important thing to know: ingredients are listed from highest to lowest concentration. The first five ingredients make up the vast majority of the product. Everything after the first ten is usually less than one percent.

"When a shampoo shouts 'WITH ARGAN OIL' on the front but argan oil is listed second-to-last, you're getting almost none of it," says Lewis. "That's not an accident. It's deliberate positioning. Look at what comes first — that tells you what the product actually is, not what the brand wants you to think it is."

Water (listed as Aqua) is almost always first — it makes up 60–80% of most products. That's normal and necessary. What matters is what comes next.

02 — The Cleansing Agents Tell You How Harsh a Shampoo Is

In shampoos, the second and third ingredients are usually surfactants — the cleansing agents. These determine how stripping or gentle the shampoo is.

Harsher: Sodium Lauryl Sulfate (SLS), Sodium Laureth Sulfate (SLES). Effective cleaners but aggressive — strip colour and natural oils. Gentler: Cocamidopropyl Betaine (derived from coconut), Sodium Cocoyl Isethionate, Decyl Glucoside. These clean without over-stripping.

"When I look at a client's shampoo and SLS is the second ingredient, I already know why their colour is fading and their hair is dry," says Debbie at the Waterfront. "The cleanser is too aggressive. Switch the shampoo and half the problem resolves within weeks."

03 — Silicones Are Not the Enemy

Silicones — ingredients ending in -cone or -xane — coat the hair to add shine, reduce frizz, and protect from heat. They work. The concern about buildup is real but easily managed.

Water-soluble silicones (like Dimethicone Copolyol) rinse out easily. Non-water-soluble silicones (like Dimethicone) need a clarifying shampoo occasionally to remove buildup. Use a clarifying shampoo once a month and buildup is not a problem.

"The anti-silicone movement was overcorrection," says Warren at Cavendish. "Yes, silicones can build up if you never clarify. But the solution is a monthly clarifying wash, not avoiding silicones entirely. They make hair look and feel significantly better and many people who switched away from them found their hair looked worse."

04 — Proteins: Useful but Easy to Overdo

Damaged hair needs protein to rebuild structure. Look for hydrolyzed proteins — Hydrolyzed Keratin, Hydrolyzed Wheat Protein, Hydrolyzed Silk Protein, Amino Acids. "Hydrolyzed" means broken into small enough pieces to actually penetrate the hair shaft.

The catch: too much protein makes hair stiff, brittle, and snappy. If your hair feels crunchy or breaks easily after protein treatments, reduce them and add moisture. Balance is the key — damaged hair needs both protein and moisture, not one exclusively.

05 — Three Types of Moisturisers — Dry Hair Needs All Three

Humectants draw moisture in: Glycerin, Hyaluronic Acid, Aloe Vera. Emollients soften and nourish: natural oils (Argan, Jojoba, Coconut), Shea Butter, Squalane. Occlusives seal moisture in: Petrolatum, Mineral Oil, Beeswax.

"Dry hair that only has humectants without occlusives will keep drawing moisture in but not retaining it," says Judy, head trainer. "All three work together. A mask with glycerin and shea butter and a sealing oil is doing more than a mask with just one of those."

06 — Marketing Tricks Worth Knowing

"Free from" claims tell you what's not in the product but nothing about what is. A sulphate-free shampoo might use harsher alternatives. Check the actual cleansing agents.

Proprietary blends group ingredients under a branded name — "Morpho-Kératine Complex" — which obscures the actual amounts of each ingredient. It's not necessarily deceptive, but it limits transparency.

Natural doesn't mean better. Many synthetic ingredients are gentler and more effective than natural alternatives. Poison ivy is natural. Judge ingredients by what they do, not where they come from.

Preservatives are necessary. Phenoxyethanol, Sodium Benzoate, Potassium Sorbate — these prevent bacteria and mould. Without them, products spoil within weeks. "Preservative-free" sounds appealing but creates real safety concerns.

Frequently Asked Questions

How do I know if a product actually has enough of an ingredient to work?

If the ingredient you're looking for is in the first five to seven on the list, there's enough to be meaningful. If it's near the end, there's probably less than 1% — more marketing than function.

Are silicones bad for hair?

No. They add shine, reduce frizz, and protect from heat. Buildup is the only real concern — managed with a monthly clarifying shampoo. Avoiding silicones entirely is usually unnecessary.

What does sulphate-free actually mean?

It means the shampoo uses gentler cleansing agents instead of SLS or SLES. This doesn't automatically mean it's gentle — some sulphate-free shampoos use harsh alternatives. Check the actual surfactants listed.

Why does my hair feel crunchy after a protein treatment?

Too much protein without enough moisture. Add a hydrating mask to balance, and reduce the frequency of protein treatments. Hair needs both protein and moisture in balance.

What should I look for in a product for dry hair?

Humectants (glycerin, hyaluronic acid) in the first five ingredients, emollients (argan oil, shea butter) in the top seven, and an occlusive or sealing ingredient. All three types of moisturiser together give the best result.

Shop professional hair care with transparent formulations at Partners Hair, or find your nearest salon for personalised advice. Free delivery on orders over R390.