Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

K18 Hair PEPTIDE PREP™ Clarifying Detox Shampoo Versus Wella Elements Calming Shampoo

K18 Hair PEPTIDE PREP™ Clarifying Detox Shampoo Versus Wella Elements Calming Shampoo Detailed comparison of K18 Hair PEPTIDE PREP™ Clarifying Detox Shampoo versus Wella Elements Calming Shampoo. Water Sodium C14-16 Olefin Sulfonate Cocamidopropyl Hydroxysulta

This source-based comparison does not add ratings or recommend a winner.

K18 Hair PEPTIDE PREP™ Clarifying Detox Shampoo Versus Wella Elements Calming Shampoo Detailed comparison of K18 Hair PEPTIDE PREP™ Clarifying Detox Shampoo versus Wella Elements Calming Shampoo. Water Sodium C14-16 Olefin Sulfonate Cocamidopropyl Hydroxysultaine Salicylic Acid Charcoal Powder Sh-Oligopeptide-78 Panthenol Glycerin Sodium Phytate Guar Hydroxypropyltrimonium Chloride Caprylyl Glycol Caprylhydroxamic Acid Citric Acid Potassium Hydroxide Sodium Hydroxide Parfum Benzyl Salicylate Limonene Water, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Hydroxysultaine, Salicylic Acid, Charcoal Powder, Sh-Oligopeptide-78, Panthenol, Glycerin, Sodium Phytate, Guar Hydroxypropyltrimonium Chloride, Caprylyl Glycol, Caprylhydroxamic Acid, Citric Acid, Potassium Hydroxide, Sodium Hydroxide, Parfum, Benzyl Salicylate, Limonene Cocamidopropyl Betaine Sodium Methyl Oleoyl Taurate Sodium Lauroyl Sarcosinate Phenoxyethanol Sodium Benzoate Polyquaternium-10 Disodium EDTA Propylene Glycol Ethylhexylglycerin Camellia Sinensis Leaf Extract Tocopherol Sodium Citrate Water, Cocamidopropyl Betaine, Sodium Methyl Oleoyl Taurate, Glycerin, Sodium Lauroyl Sarcosinate, Parfum, Panthenol, Phenoxyethanol, Sodium Benzoate, Polyquaternium-10, Citric Acid, Disodium EDTA, Propylene Glycol, Ethylhexylglycerin, Camellia Sinensis Leaf Extract, Tocopherol, Sodium Citrate Be the first to review These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Citric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes. Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath. However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products. Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH. In skincare formulas, citric acid can: While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants. Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations. Rosacea skin has a lower threshold for acids generally, with 62.5% of rosacea subjects in one study reacting to lactic acid in a sting test. This is why we mark citric acid as a potential rosacea trigger. However, this ingredient shows up as a pH adjuster or chelator at roughly 0.1-1% in many products. These low levels are unlikely to be an issue for rosacea skin and becomes a potential trigger at exfoliating concentrations (20%). Because everybody's skin is unique, we recommend a patch test if you are unsure. Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum. Topically, glycerin does several things at once: Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3. Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin. This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products. Just know very high concentrations (>40%) can feel tacky in low humidity. Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine. Panthenol is a common ingredient that helps hydrate and soothe the skin. It is found naturally in our skin and hair. There are two forms of panthenol: D and L. D-panthenol is also known as dexpanthenol. Most cosmetics use dexpanthenol or a mixture of D and L-panthenol. Panthenol is famous due to its ability to go deeper into the skin's layers. Using this ingredient has numerous pros (and no cons): Like hyaluronic acid, panthenol is a humectant. Humectants are able