Question 1

What's the difference between a sulphate-free shampoo and a regular one?

Accepted Answer

Sulphate-free shampoos use gentler surfactants that clean without stripping the scalp's natural oils, making them better suited to dry, colour-treated, or curly hair. Regular shampoos typically contain sodium lauryl sulphate (SLS) or sodium laureth sulphate (SLES), which lather more aggressively and cleanse more thoroughly — ideal for oily scalps or heavy product users. Neither is universally superior; the right choice depends on your scalp type and how often you wash.

Question 2

How often should I actually be washing my hair?

Accepted Answer

For most hair types, two to three times per week is the evidence-backed sweet spot — washing daily strips natural oils and can trigger the scalp to overproduce sebum in response. Fine, oily hair may need more frequent washing; thick, dry, or curly hair can often go longer between washes. Dry shampoo can extend the gap, but it's not a substitute — it absorbs oil without removing product build-up or dead skin cells.

Question 3

Is Olaplex No. 4 actually worth the price?

Accepted Answer

Yes, for chemically processed or heat-damaged hair, Olaplex No. 4 is one of the few shampoos where the science genuinely supports the claims. Its bond-building technology (patented bis-aminopropyl diglycol dimaleate) actively repairs broken disulphide bonds rather than just coating the hair shaft. If your hair is healthy and unprocessed, the benefit is minimal and a mid-range shampoo will serve you just as well.

Question 4

Can I use a professional shampoo at home, or is it only for salons?

Accepted Answer

Professional shampoos are absolutely suitable for home use — the "professional" label refers to the formulation standard and concentration, not a restriction on who can buy them. Brands like Wella Professionals, Paul Mitchell, and Davines are widely available online and often work out cheaper per wash than supermarket alternatives when bought in litre formats. The main adjustment is using less product per wash, as these formulas are more concentrated.

Question 5

What shampoo should I avoid if I have a sensitive scalp?

Accepted Answer

Avoid shampoos with heavy synthetic fragrances, alcohol high on the ingredient list, and strong sulphates (SLS in particular) if you have a sensitive or reactive scalp. Menthol and eucalyptus, while refreshing, can also irritate some scalps. Look instead for fragrance-free or hypoallergenic formulas, ideally dermatologist-tested — Bioderma's Nodé range is a solid dermatological option. Always patch-test a new shampoo if your scalp is prone to reactions.

Question 6

Does Fanola No Yellow shampoo actually work, or is it just a trend?

Accepted Answer

Fanola No Yellow genuinely works — it contains violet pigments that neutralise yellow and brassy tones in blonde, silver, and highlighted hair through colour theory (purple cancels yellow on the colour wheel). The key is not leaving it on too long; two to three minutes is typically sufficient, and over-use can leave a purple tint. At well under 6 £ for 350ml, it's one of the best-value colour-maintenance products in the entire catalogue.

Question 7

Is it worth buying a shampoo in a 1,000ml bottle to save money?

Accepted Answer

It depends on the formula. Professional litre bottles from Wella or Wella Professionals are genuinely cost-effective because the formulas are concentrated — you use less per wash. However, shampoo can degrade once opened, particularly natural or preservative-free formulas, so if it takes you a year to get through a litre bottle, you may be better off with a 400ml format. As a rule of thumb, litre bottles make sense if you wash your hair daily or share with a partner.

Hair Shampoos Price Comparison

Revlon PRO YOU the tamer

Revlon PRO YOU the twister

Wella Fusion Shampoo 1000ml

American Crew Detox Shampoo 250 ml Men

Wella Invigo Color Brilliance 1000 ml Shampoo Professional Women

Wella Invigo Color Brilliance 1000 ml Shampoo Professional Women

Wella Invigo Nutri Enrich Shampoo 1000ml

Wella Invigo Scalp Balance Deep Cleansing Shampoo 1000ml

Revlon Equave Detox Micellar Shampoo For All Hair Types 485ml

American Crew 3-in-1 Tea Tree, 450ml

Tigi Colour Goddess Shampoo, 750ml

Olaplex N.4D Clean Volume Detox Dry Shampoo 250ml

ALFAPARF Milano Enhancing Low Shampoo 250ml

ALFAPARF Milano Balancing Low Shampoo 250ml

Revlon PRO YOU the winner

Schwarzkopf got2b Fresh It Up Extra Fresh Dry Shampoo 200ml

Revlon PRO YOU the moisturizer

Revlon PRO YOU the fixer

Fudge Professional Clean Blonde Damage Rewind Purple Toning Shampoo 250ml Unisex

JOHN FRIEDA Sheer Blonde 250 ml Shampoo Women

Revlon UniqOne All in one Shampoo 490 ml Professional Women

American Crew Classic 3-in-1 Shampoo Plus Conditioner

Batiste Blush Floral & Flirty 200 ml

Batiste Cherry 200 ml

Hair Shampoos Price Comparison