The Ordinary Multi-Peptide Serum for Hair Density Versus Olaplex Nº.9 Bond Protector Nourishing Hair Serum

The Ordinary Multi-Peptide Serum for Hair Density Versus Olaplex Nº.9 Bond Protector Nourishing Hair Serum Detailed comparison of The Ordinary Multi-Peptide Serum for Hair Density versus Olaplex Nº.9 Bond Protector Nourishing Hair Serum. Water Propanediol Butylene Glycol Glycerin Caffeine Biotinoyl Tripeptide-1 Acetyl Tetrapeptide-3 Larix Europaea Wood Extract Pisum Sativum Extract Scutellaria Baicalensis Root Extract Triticum Vulgare Germ Extract Glycine Soja Germ Extract Trifolium Pratense Flower Extract Camellia Sinensis Leaf Extract Apigenin Oleanolic Acid Arginine Glycine Calcium Gluconate Zinc Chloride Lactic Acid Gluconolactone Dextran Maltodextrin Hydroxyethylcellulose Xanthan Gum Pentylene Glycol Dimethyl Isosorbide Polysorbate 20 PPG-26-Buteth-26 PEG-40 Hydrogenated Castor Oil Trisodium Ethylenediamine Disuccinate Sodium Metabisulfite Sodium Benzoate Phenoxyethanol Chlorphenesin Water, Propanediol, Butylene Glycol, Glycerin, Caffeine, Biotinoyl Tripeptide-1, Acetyl Tetrapeptide-3, Larix Europaea Wood Extract, Pisum Sativum Extract, Scutellaria Baicalensis Root Extract, Triticum Vulgare Germ Extract, Glycine Soja Germ Extract, Trifolium Pratense Flower Extract, Camellia Sinensis Leaf Extract, Apigenin, Oleanolic Acid, Arginine, Glycine, Calcium Gluconate, Zinc Chloride, Lactic Acid, Gluconolactone, Dextran, Maltodextrin, Hydroxyethylcellulose, Xanthan Gum, Pentylene Glycol, Dimethyl Isosorbide, Polysorbate 20, PPG-26-Buteth-26, PEG-40 Hydrogenated Castor Oil, Trisodium Ethylenediamine Disuccinate, Sodium Metabisulfite, Sodium Benzoate, Phenoxyethanol, Chlorphenesin Betaine Quaternium-22 Bis-Aminopropyl Diglycol Dimaleate Sodium Hyaluronate Cetrimonium Chloride Panthenol Pvp Guar Hydroxypropyltrimonium Chloride Furcellaria Lumbricalis Extract Pelvetia Canaliculata Extract Xylitylglucoside Polyquaternium-44 Anhydroxylitol Maltitol Citric Acid Xylitol Ethylhexylglycerin Sodium Hydroxide Sorbic Acid Parfum Citral Citronellol Hexyl Cinnamal Limonene Linalool Water, Propanediol, Betaine, Quaternium-22, Bis-Aminopropyl Diglycol Dimaleate, Sodium Hyaluronate, Cetrimonium Chloride, Panthenol, Hydroxyethylcellulose, Pvp, Guar Hydroxypropyltrimonium Chloride, Furcellaria Lumbricalis Extract, Pelvetia Canaliculata Extract, Xylitylglucoside, Polyquaternium-44, Anhydroxylitol, Maltitol, Citric Acid, Trisodium Ethylenediamine Disuccinate, Xylitol, Ethylhexylglycerin, Sodium Hydroxide, Sorbic Acid, Phenoxyethanol, Sodium Benzoate, Parfum, Citral, Citronellol, Hexyl Cinnamal, Limonene, Linalool These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Hydroxyethylcellulose is used to improve the texture of products. It is created from a chemical reaction involving ethylene oxide and alkali-cellulose. Cellulose is a sugar found in plant cell walls and help give plants structure. This ingredient helps stabilize products by preventing ingredients from separating. It can also help thicken the texture of a product. This ingredient can also be found in pill medicines to help our bodies digest other ingredients. Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!). It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome. On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive. Another perk of this ingredient is that it stays functional across a wide pH range (3-10). You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own. Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU. Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages. Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon. Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin. It’s often used to: Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent. Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically. Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed. Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase. It is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods. Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps. We always recom