Shampoo
Shampoo
British United Kingdom
New Zealander New Zealand

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Cleansing 100% Color Care 50% Waves 50%

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Cleansing, Masking, Perfuming

This ingredient is also known as lime essential oil or key lime essential oil.

Like other citrus extracts and oils, this ingredient contains furanocoumarins that can cause phototoxicity.

Perfuming, Solvent

Limonene is the compound that gives citrus peel its smell.

In skincare, it shows up as a standalone fragrance ingredient or as a natural compound of citrus and other essential oils.

You'll typically see this ingredient used in very small amounts; anything above 0.001% in a leave-on product or 0.01% in a rinse-off has to be named on the label in the EU. The citrus oils that carry it sit around 0.5-1% in a finished formula.

Fresh limonene is a weak allergen; the real issue is that it slowly reacts with air and then breaks down from oxidation to create hydroperoxides (which are strong sensitizers). This is why suppliers are required to keep the peroxide value below 20 mmol.

Positive reactions in people being investigated for eczema vary:

It's worth skipping if you have a known fragrance allergy or a compromised barrier, but the risk is low for most people.

Older or long-opened products are also more likely to bother you than fresh ones due to oxidation.

Learn more about Limonene
Cleansing, Emulsifying, Surfactant

Sodium Coco-Sulfate (SCS) is an anionic cleanser made by sulfating coconut-derived fatty alcohols and neutralizing them into a sodium salt. It's a strong and bubbly cleanser and closely realted to SLS.

This ingredient works by grabbing onto oil, dirt, and grime so they can be rinsed away. It also helps add foam for a big-lather feel.

Like other members of the alkyl sulfate family, these surfactants can be drying or irritating. This is especially true if your skin barrier is already stressed, the product is very concentrated, or if you leave the ingredient on for too long.

One research paper comparing SCS vs SLS found SCS may score a bit more on the "milder" side for irritation measures, but it still interacts strongly with skin lipids which can cause barrier disruption.

SCS tends to be the best in rinse-off products.

Learn more about Sodium Coco-Sulfate

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