Perfect Clean 2-in-1 Scalp Scrub & Clarifying Shampoo

A disaccharide (table sugar) that acts as a humectant to improve skin hydration and is a naturally occurring component of the skin barrier. It is well established as safe for topical cosmetic use with no known hazards.

A humectant that draws water into the skin. One of the best-studied, best-tolerated ingredients in personal care.

A primary cleansing surfactant similar in strength to sodium laureth sulfate, used in many "sulfate-lite" shampoos even though it is itself a sulfonate detergent. CIR concluded it is safe in rinse-off products; it can be drying or irritating for already-sensitized scalps at higher use levels, same as most anionic surfactants.

A coconut-derived fatty acid amide used as a foam booster and thickener in shampoos and washes. It is a recognized, if uncommon, contact sensitizer, and because it belongs to the same ethanolamine family reviewed alongside cocamide DEA, formulators are advised to keep it free of nitrosamine-forming contaminants; well-made products with controlled impurity levels are considered acceptable for rinse-off use.

A wax-like ester of ethylene glycol and stearic acid used purely to thicken shampoo/conditioner and give it a pearly opaque look; it has no cleansing or active role. CIR found it non-sensitizing and non-irritating even at high test concentrations, and decades of manufacturer exposure data show no reported health effects.

The base most products are built on. It carries the other ingredients and has no safety concern.

An amino acid widely used in cosmetics for skin conditioning and moisture retention. It is well-studied and well-tolerated across skin types at cosmetic use levels.

A yeast-fermented rice ingredient used in skincare formulations for hydration and conditioning. No safety concerns documented at cosmetic use levels.

A lightweight humectant and solvent similar in role to propylene glycol, used to carry actives and give lotions a lighter feel. CIR has reviewed it and considers it safe as used in cosmetics.

Sodium PCA is a natural component of skin's own moisturizing factor and is used in cosmetics as a humectant to help skin hold onto water. It has an extensive history of safe use with no meaningful irritation or sensitization signal.

A corn-derived solvent and humectant that has largely replaced propylene glycol in "clean" formulas; CIR reviewed the alkane diol group and found use concentrations up to about 40 percent in leave-on products like deodorant sticks with no meaningful irritation signal.

A natural source of salicylates, traditionally used for gentle chemical exfoliation and inflammation support. It delivers BHA-like activity through natural compounds and is generally well tolerated. People with salicylate sensitivity should exercise caution, and it may cause mild irritation in very sensitive skin.

A humectant that holds water at the skin surface for a more hydrated look. No safety concern.

A quaternized derivative of hyaluronic acid that combines hydration and film-forming benefits for enhanced moisturizing effects. It is documented in cosmetic use as well tolerated, though people sensitive to quaternary ammonium compounds may want to perform a patch test.

A modified guar gum used to thicken and stabilize emulsions and gels. It is derived from guar beans and is well tolerated when applied topically. It is common in skincare formulas where a smooth texture is valued.

A plant-derived emollient oil rich in ricinoleic acid, used in skincare for decades. Contact allergy has been reported but is uncommon relative to how widely it is used in leave-on products.

A rich plant butter pressed from shea tree nuts, valued for softening and cushioning dry skin. It is generally well tolerated, though very rare allergic reactions have been reported and people with tree nut allergies who are cautious may want to patch test first.

A fatty-acid and tocopherol-rich plant oil used as a hair and skin emollient; CIR's review of plant-derived fatty acid oils found no evidence of irritation or sensitization and a long history of safe use in food and cosmetics.

A lightweight botanical oil from marula tree seeds, valued for softening and conditioning the skin. It is generally well tolerated across skin types.

A rich plant butter from mango seed kernels, valued for its emollient and protective properties. It is generally well tolerated, though very rare allergic reactions have been reported; those with tree nut allergies may want to patch test first.

A rich, solid-at-room-temperature oil that deeply softens dry skin and hair. It is well tolerated overall, but its high lauric acid content is considered comedogenic by many dermatologists, so it can trigger breakouts in people who are acne-prone.

Ordinary salt, used in surfactant-based products like shampoos and body washes to adjust viscosity by interacting with the surfactant micelles. It has no meaningful toxicity concern at cosmetic use levels; the main practical downside is that too much can make a formula feel less mild.

Xanthan gum is a microbial-fermentation-derived polysaccharide used to thicken and stabilize textures, similarly common in food. Cosmetic panel review of this and related microbial gums found them safe as used, with no meaningful irritation signal at typical concentrations.

A coconut-derived amphoteric surfactant used to boost foam and mildness in cleansers and shampoos. CIR has reviewed it as safe as used, but it is one of the more established contact-allergy triggers in personal care, usually traced to manufacturing impurities such as amidoamine and dimethylaminopropylamine (DMAPA) rather than the betaine itself. People with a history of eyelid or scalp dermatitis are more likely to react.

A mild amino-acid-based cleansing agent made from coconut fatty acids and the amino acid glycine. It foams less aggressively than sulfates and has no significant safety concerns reported in rinse-off use.

A phospholipid emulsifier from soy or sunflower that binds water and oil and helps other ingredients absorb. It is a natural component of skin membranes, well tolerated, and reviewed as safe as used; a soy-derived grade is not a meaningful concern for a soy food allergy because the protein is largely absent.

A synthetic surfactant and emulsifier that blends oils and water in cosmetics and has been used safely for decades in cosmetics and pharmaceuticals. Published safety literature is extensive and reassuring at cosmetic levels.

Used in tiny amounts to set a product to skin-friendly pH. No concern at those levels.

A salt derived from citric acid that buffers pH and prevents metal oxidation in formulas. Widely used in food and cosmetics, it is well tolerated at cosmetic concentrations.

A salt used to adjust and maintain the pH of cosmetic formulations. It has no safety concern at typical cosmetic use levels.

A small-dose synthetic antioxidant that prevents oils and fragrance in a formula from oxidizing. Not shown to pose a toxicological risk at the levels used in cosmetics.

A gentle humectant derived from glucose. It draws water to the skin and is mild enough for sensitive skin types. Widely used in cosmetics without reported safety concerns.

A widely used preservative, safe at the legal limit of 1% or less. Often the "paraben-free" replacement.

The sodium salt of benzoic acid, used as a preservative in both foods and cosmetics. Decades of safety review support its use at typical cosmetic concentrations, with mild irritation the main reported issue in sensitive skin.

An undisclosed scent blend that can contain dozens of components. The single most common cause of cosmetic contact allergy, and the blend is not itemized, so you cannot see what is in it.

Tea tree oil is used for its antimicrobial reputation in blemish-focused products, but it is a genuine, well-documented contact sensitizer, and its allergy potential rises sharply once the oil has oxidized from air exposure. Fresh, well-preserved, low-concentration formulations are much lower risk than old or improperly stored oil.