How to Read a Shampoo Ingredient List: A Plain-English Guide for Every Indian Shopper

The label is the truth. Here's how to read it — so you know exactly what you're putting on your scalp every single day.

The average Indian shampoo label contains 20 to 30 ingredients. Most people read none of them. The brands know this — and some rely on it.

Reading an ingredient list is a skill that takes about ten minutes to learn and pays dividends for the rest of your life. Every shampoo, conditioner, and hair care product you ever buy will make more sense. You'll stop being impressed by marketing claims and start evaluating what's actually inside.

Here's everything you need to know.

Rule 1: Ingredients Are Listed by Concentration — Most to Least

This is the most important rule. By law in India (and internationally under INCI standards), cosmetic ingredients must be listed in descending order of concentration. The first ingredient is the most abundant. The last is the least.

What this means practically:

•       The first 5 ingredients make up the bulk of the product — usually 80–90% of what's in the bottle

•       An ingredient in position 20 out of 22 is present at trace levels — often less than 1%

•       A brand that puts 'Rosemary Extract' on the front label but lists it second-to-last on the back has put in a cosmetic dusting — not a functional amount

When Reytha lists Rosemary Extract as a mid-to-upper ingredient, it's there at a meaningful concentration. That's the difference between an ingredient for marketing and an ingredient for function.

Rule 2: 'Aqua' Means Water — and That's Fine

Water (listed as 'Aqua' in INCI nomenclature) is the first ingredient in almost every shampoo and conditioner. This is not a red flag — it's a formulation reality. Water is the vehicle that carries every other ingredient to your scalp and hair. Without it, the formula wouldn't spread, rinse, or work.

The presence of water tells you nothing bad about a product. What matters is what comes next.

Rule 3: These Ingredients Are Red Flags

Sodium Lauryl Sulphate (SLS) / Sodium Laureth Sulphate (SLES)

The primary foaming agents in most conventional shampoos. Their pH is highly alkaline (7.5–10), which disrupts the scalp's natural acid mantle and strips the protective moisture barrier. SLES is slightly milder than SLS but both are associated with scalp irritation and dryness with regular use. Look for these in positions 2–5 on the ingredient list — if they're there, they're the primary cleansers.

Parabens (methylparaben, propylparaben, butylparaben, ethylparaben)

Synthetic preservatives used to extend shelf life. While the debate on their safety is ongoing, their endocrine-disrupting potential has led most clean beauty brands (and the EU) to phase them out. Easy to avoid — most modern formulas have moved to alternative preservation systems.

Artificial Dyes / Colours

Listed as FD&C Blue 1, Red 40, Yellow 5, or similar codes. Shampoos don't need to be any colour — the colour is purely cosmetic and adds no benefit while adding potential for scalp sensitisation in some individuals.

Formaldehyde Releasers (DMDM Hydantoin, Imidazolidinyl Urea, Diazolidinyl Urea, Quaternium-15)

Preservatives that slowly release small amounts of formaldehyde to prevent bacterial growth. Formaldehyde is a known carcinogen and allergen. The amounts released are generally considered below harmful thresholds, but safer alternatives exist — and Reytha uses them.

Rule 4: These Ingredients Are Worth Celebrating

Plant-Derived Oils (Cocos Nucifera Oil, Ricinus Communis Seed Oil)

Coconut Oil and Castor Oil respectively. Both have strong scientific backing for hair health — Coconut Oil for protein retention, Castor Oil for follicle nourishment and cuticle sealing. Finding these high on an ingredient list is a genuine positive signal.

Aloe Barbadensis Leaf Extract

Aloe Vera extract. Anti-inflammatory, hydrating, scalp-soothing. The higher it appears on the list, the more meaningfully it's present.

Rosmarinus Officinalis Leaf Extract

Rosemary Extract. Antimicrobial, anti-inflammatory, scalp-stimulating. The most researched botanical hair care ingredient of the last decade. Its INCI name is easy to spot once you know it.

Citric Acid

Not a preservative here — Citric Acid in shampoo is primarily a pH adjuster that brings the formula into the scalp-safe 4.5–5.5 range. Its presence is a sign of a thoughtfully formulated product.

Polyquaternium-7 / Polyquaternium-10

Conditioning agents that provide slip and detangling without the heavy build-up of silicones. These are the workhorses of well-formulated conditioners and conditioning shampoos.

Rule 5: 'Fragrance' or 'Perfume' Is a Catch-All

When you see 'Fragrance', 'Parfum', or 'Perfume' on an ingredient list, know that this single word can represent dozens of individual chemical compounds — none of which need to be individually disclosed under current Indian cosmetics regulations. Fragrance compounds are among the most common causes of contact dermatitis and scalp sensitisation.

Reytha uses 'FO' (Fragrance/Flavour Oil) — a blended fragrance compound. We don't claim to be fragrance-free (our products have a pleasant natural scent). But if you have sensitive skin or scalp allergies, fragrance should always be a point of attention on any brand's label.

Rule 6: Natural-Sounding Names Aren't Always Natural

Ingredients like 'Cetyl Alcohol', 'Stearic Acid', and 'Dimethicone' sound synthetic — but context matters. Cetyl Alcohol and Stearic Acid are naturally derived fatty acids used as emollients and emulsifiers. Dimethicone is a synthetic silicone — but at the low concentrations in a rinse-off shampoo, it functions as a lightweight conditioning agent that washes out cleanly.

The point is: ingredient names are confusing by design (they use scientific INCI nomenclature, not common names). Don't judge by sound alone — judge by function, concentration, and purpose.

The Reytha Label — What You'll Find

Every Reytha product lists: Stearic Acid, Cetyl Alcohol, Citric Acid, Coconut Oil (Cocos Nucifera Oil), Castor Oil (Ricinus Communis Seed Oil), Aloe Vera Extract (Aloe Barbadensis Leaf Extract), Dimethicone, Polyquaternium-7, Polyquaternium-10, Perfume (FO), Aqua, Rosemary Extract (Rosmarinus Officinalis Leaf Extract).

No SLS. No SLES. No parabens. No artificial dyes. Every ingredient has a specific, documentable function. That's our label promise — and it won't change.