Best Non-Toxic, Fragrance-Free Shampoo

How many fragrance-free shampoos are actually non-toxic?

We analyzed 826 shampoos and 16 were fragrance-free. Of those, 7, around 44%, met the Welpr Standard, compared with only 31 of 826 shampoos overall, around 4%.

Fragrance-free shampoos were much more likely to meet the Welpr Standard than shampoos overall in our analysis. Still, choosing fragrance-free alone doesn't settle questions about the rest of the formula.

When we say a shampoo is “non-toxic,” we mean it meets the Welpr Standard, our precautionary consumer standard; the shampoo guide explains what that means.

Why most fragrance-free shampoos still don't meet the Welpr Standard

Of the 16 fragrance-free shampoos, 9 didn't meet the Welpr Standard. The main reason was potential contamination by 1,4-dioxane. The other reason was zinc pyrithione, flagged by the European Commission as a reproductive toxicant.

Flagged ingredients in fragrance-free shampoo

1 of the 16 fragrance-free shampoos listed at least one ingredient flagged by the Welpr Standard; the table below shows how often each appeared, which organization identified the concern, and why it was flagged.

Transparency issues in fragrance-free shampoo

8 of the 16 fragrance-free shampoos had at least one disclosure gap or potential-contaminant flag.

Choosing fragrance-free shampoo doesn't remove the potential 1,4-dioxane question. Polyquaternium-10 was the most common carrier of this flag, followed by Disodium Laureth Sulfosuccinate, PPG-5-Ceteth-20, Trideceth-6, and PEG-150 Distearate. See the shampoo guide's 1,4-dioxane entry.

Potential-contaminant flags accounted for the transparency issues in this group, rather than undisclosed blends. These flags arise because 1,4-dioxane can form as a byproduct during ethoxylation. The shampoo guide explains how these differ from undisclosed blends.

How often “free from” shampoos meet the Standard

Does avoiding another ingredient change the picture? This table compares how often shampoos without each ingredient or ingredient family met the Welpr Standard.

Silicone-free and sulfate-free shampoos met the Standard slightly more often than shampoos overall, while paraben-free, SLS-free and SLES-free stayed closer to the overall pass rate. None changed the odds as much as fragrance-free.

What does fragrance-free mean?

Fragrance gives shampoo a scent or masks the odor of other ingredients. For this page, fragrance-free means the disclosed formula lists no fragrance, parfum, essential oils, aroma chemicals, or fragrance allergens. The brand or retailer must also describe the shampoo as fragrance-free, free of added fragrance, or unscented, and no product page may name a scent for it. We check both the ingredient list and product descriptions rather than relying on the bottle alone.

Fragrance-free has no FDA legal definition for cosmetics. On ingredient labels, scent ingredients may appear as fragrance or parfum, individual essential oils, or names such as limonene and linalool. Plant extracts and carrier oils such as argan or jojoba oil aren't automatically excluded when they aren't added for scent. This screening checks what's disclosed; it doesn't prove that undisclosed constituents contain no fragrance.

The table below shows the fragrance ingredients and fragrance allergens we found on ingredient labels and how many of the 826 shampoos contained each.

Limonene, linalool, and essential oils such as sweet orange peel oil and lavender oil appeared in shampoos that met the Welpr Standard. Those shampoos aren't on this fragrance-free page.

Fragrance-free vs. no synthetic fragrance

No synthetic fragrance and no artificial fragrance are narrower claims: they can still allow natural fragrance and essential oils. Naturally scented and essential-oil scented describe the source of a scent, not its absence. These claims aren't equivalent to fragrance-free as used in this guide.

Is fragrance-free shampoo better?

Fragrance-free shampoo can be a useful choice if you dislike scented hair products or have a known fragrance allergy. People with sensitive scalps also often look for it to avoid fragrance-related irritation. See what fragrance-free means for how we select products for this page.

The main trade-off is the scented washing experience, not cleaning performance: fragrance isn't needed to cleanse hair. You can choose around your hair's cleansing and conditioning needs without making scent part of the decision.

The Welpr Standard does address undisclosed fragrance: a fragrance listed without its ingredients keeps a shampoo from meeting it. But the Standard doesn't require every shampoo to be fragrance-free. The shampoo guide's undisclosed blend entry explains the transparency concern.

Best non-toxic, fragrance-free shampoo overall

Our overall pick is the highest-ranked fragrance-free shampoo that met the Welpr Standard.

Choosing the best non-toxic, fragrance-free shampoo for your hair type and scalp needs

Here are our picks for non-toxic, fragrance-free shampoo by hair type and scalp need:

Best for dry hair

Dry hair needs cleansing that removes dirt and buildup without leaving the lengths feeling stripped. Look for a moisturizing fragrance-free shampoo with mild cleansers and ingredients such as glycerin, rather than a deep-cleansing formula intended for heavier buildup.

Best for frizzy hair

Dryness and damage to the hair’s outer layer can make frizz harder to manage, especially in humid air. Look for a smoothing or conditioning fragrance-free shampoo that leaves strands manageable, and follow it with a conditioner to reduce friction and tangles.

Best for oily hair

Oily hair needs enough cleansing to remove excess sebum without leaving a heavy coating at the roots. Look for a fragrance-free shampoo aimed at oily hair, and choose lighter conditioning if richer formulas leave your hair looking greasy.

Best for sensitive scalp

A sensitive scalp needs a cleanser you can use without persistent stinging, itching, or tightness. When choosing a fragrance-free shampoo, look for a formula intended for sensitive scalps and avoid ingredients you already know you react to; the shampoo guide covers fragrance allergens in more detail.

Types of non-toxic, fragrance-free shampoo

We cover fragrance-free shampoo bars and liquid shampoo.

Non-toxic, fragrance-free liquid shampoo

Choosing a fragrance-free liquid shampoo? See the shampoo guide’s liquid shampoo section for more on this format.

Non-toxic, fragrance-free shampoo bars

For help choosing a fragrance-free shampoo bar, see the shampoo guide’s soap-based vs. syndet bar comparison.