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A study comparing surfactant mixtures found that Sodium Lauroyl Glutamate caused visibly less disruption to skin lipid structure and less irritation than SLS when tested on human subjects; this correlated with the data from in vivo results as well.

The Tenside, Surfactants, Detergents cosmetics industry journal has also concluded that amino acid based surfactants are generally milder than their corresponding alkyl sulfate counterparts. They also stated glutamates in particular are considered one of the gentler options in the category.

The Cosmetic Ingredient Review (CIR) Expert Panel has reviewed dermal irritation and sensitization data for this ingredient at the highest reported use concentration and concluded it to be safe in present practices.

Typical use concentrations tend to run low (generally less than 10%) though the CIR's review noted the highest reported use concentration was 40% as a raw material blend (and not a diluted finished cosmetic product).

Research shows it can encourage your skin cells to turn over and renew by stimulating keratinocyte and fibroblast proliferation.

It also has mild keratolytic properties to help loosen and shed dead skin cells without being harsh.

Studies also suggest allantoin can help calm inflammation by dialing down some of the chemical signals your skin sends out when it is irritated.

This ingredient is typically used in the 0.1-0.5% range, and the FDA recognizes it as a skin protectant in OTC products up to 2%.

Overall, allantoin is a wonderful addition to most routines; it is stable across a wide pH range (~4-8), works well with other ingredients, and is considered non-sensitizing/non-irritating.

Fun fact: Allantoin is naturally occurring in comfrey root, beets, chamomile, and wheat sprouts. Our bodies even produce it as a byproduct of uric acid metabolism.

Safety-wise, this ingredient is pretty solid; it's even recognized as a food additive. Both animal and clinical studies found no adverse effects at the levels used in cosmetics.

Industry data shows this ingredient is used up to 45.7% in spray products and up to 33% in powder products.

Unlike other exfoliants, papain can work without causing significant irritation.

Beyond exfoliation, its proteolytic action also helps soothe irritated skin and supports the healing of minor wounds.

A 2024 in vivo/in vitro study confirmed its potential to suppress skin inflammation and improve transepidermal water loss (TEWL) in atopic dermatitis models.

Just one thing worth noting: there are reports of allergic responses in individuals with a papaya or latex sensitivity. Be sure to patch test if you're in this camp.

Synthetically created CI 77492 is considered safer than those naturally found. This is because the synthetically created version may contain less impurities. Iron oxides are generally non-toxic and non-allergenic.

For instance, Habanolide is a proprietary trade name for a specific aroma chemical. When used as a fragrance ingredient in cosmetics, most aroma chemicals fall under the broad labeling category of “FRAGRANCE” or “PARFUM” according to EU and US regulations.

The term 'parfum' or 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term.

For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance by INCI standards.

One example is Calendula flower extract. Calendula is an essential oil that still imparts a scent or 'fragrance'.

Depending on the blend, the ingredients in the mixture can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.

Parfum can also be used to mask or cover an unpleasant scent.

The bottom line is: not all fragrances/parfum/ingredients are created equally. If you are worried about fragrances, we recommend taking a closer look at an ingredient. And of course, we always recommend speaking with a professional.