Not all shampoos are created equal, especially when hair loss or thinning enter the picture. While no shampoo can magically regrow hair on its own, the right formula can support a healthier scalp, reduce breakage, and help preserve the hair you have. The wrong one, on the other hand, may work against you by irritating the scalp, stripping much-needed moisture, or weighing fragile strands down. And here’s the kicker: price isn’t the deciding factor. Excellent and not-so-great shampoos exist at every price point, from luxury brands to drugstore staples.
That’s why experts say it’s worth looking beyond the label hype and into what’s actually inside the bottle. According to scientists and hair experts, certain commonly used drugstore shampoos contain ingredients or formulation issues that can exacerbate shedding, inflammation, or dryness, especially for those already dealing with hair loss.
Here are three popular drugstore shampoo brands experts have flagged as potentially problematic, and why they may be making hair loss worse rather than better.
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1. Head and Shoulders
Although it’s marketed as a dandruff-fighting shampoo, many formulas contain harsh surfactants like sulfates (SLS/SLES) and synthetic fragrances that can strip natural oils and dry out the scalp and hair. Over time, this dryness and irritation may make fragile hairs more prone to breakage or shedding, especially in sensitive scalps. Ingredients like non-water-soluble silicones can build up hair, weighing down strands and preventing moisture from reaching the hair.
2. Tresemmé
Tresemmé shampoos include sulfates and other strong detergents that can strip hair of natural oils, potentially weakening strands and making breakage worse rather than helping hair feel stronger.
3. OGX Shampoos
OGX has faced scrutiny and class-action allegations over past use of preservatives like DMDM hydantoin, which releases small amounts of formaldehyde and has been linked to scalp irritation and reported hair loss or shedding for some users — though more recent formulations are phasing out those ingredients. Despite this, many OGX products rely on heavy silicones and other conditioning agents that can lead to buildup, weighing down fine or thinning hair and making it look limp rather than healthy.
