Eucerin pH5 Shower Oil Versus fur All Body Wash
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Laureth-4
Emulsifying
Mipa-Laureth Sulfate
Cleansing
Propylene Glycol
Humectant
Prunus Amygdalus Dulcis Oil
Skin Conditioning
Ricinus Communis Seed Oil
Masking
Caprylic/Capric Triglyceride
Masking
Prunus Armeniaca Kernel Oil
Masking
Tocopheryl Acetate
Antioxidant
Laureth-3
EmulsifyingGlycerin
Humectant
Lactic Acid
Buffering
Lavandula Angustifolia Oil
Masking
Salvia Sclarea Oil
Masking
Linalool
Perfuming
Limonene
Perfuming
Geraniol
Perfuming
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Laureth-4 is a nonionic surfactant made by attaching an average of four ethylene oxide units to Lauryl Alcohol, a fatty alcohol from coconut or palm kernel oil.
In a formula, it does two jobs:
A 2012 assessment found this ingredient is used in leave-on products at up to 21%, which is at the very high end for the category; most cosmetic use is far lower and typically in the single digits.
A true allergy to Laureth-4 is rare; similar alcohol ethoxylates tested negative for skin sensitization in undiluted guinea pig studies, and related compounds were non-sensitizing in Magnusson-Kligman maximization tests.
There is one caveat for this whole ingredient family: ethoxylated surfactants slowly oxidize when exposed to air, and it's the oxidation products, not the fresh material, that act as sensitizers. This is mostly a formulation and shelf life issue.
Dr. James Fulton's rabbit ear test from the 1980's scored this ingredient as a 5 on the comedogenic scale. Fulton himself described the rabbit ear as not an ideal model and the tests used undiluted ingredients on rabbit ears, which are more reactive than human facial skin.
Dr. Draelos later used a human assay on finished cosmetic products and found that products built with so-called comedogenic ingredients are not necessarily comedogenic themselves.
This ingredient can be potentially pore clogging if it appears high in the ingredient list of a leave-on product.
The fungal acne picture is actually reassuring: Malassezia uses fatty acids from its surroundings (C11-24). This ingredient has nothing for the Malassezia yeast to use since it is an alcohol and not an acid.
Supporting this, closely related ethoxylated alcohol detergents like Ceteth-20 get used in Malassezia lab work as neutral carriers to disperse a separately added fatty acid (not as the food source itself).
Learn more about Laureth-4Mipa-Laureth Sulfate is a type of sulfate.
Propylene Glycol is a synthetic, colorless, odorless liquid that has been a staple in cosmetics for decades. It is a skin conditioning agent, humectant, and solvent.
As a humectant, it draw water to the skin to reduce flaking and restore suppleness. It's also a solvent that helps dissolve other actives and keeps formulas stable across temperature changes.
The CIR Expert Panel has confirmed this ingredient to be nontoxic and clinical studies show no sensitization at cosmetic use concentrations.
True allergic reactions are quite rare: a 15-year retrospective study of 6,751 patients found only 0.31% had a positive reaction (and less than half were considered clinically relevant).
It seemed that when sensitization does occur, it's most commonly linked to topical medication (like corticosteroids) and not cosmetics. Allergic contact dermatitis also appears largely limited to individuals with underlying skin conditions.
Overall, propylene glycol is a well-studied ingredient that most people can tolerate without issue.
Learn more about Propylene GlycolThis ingredient is also known as castor oil. It is a skin conditioning ingredient.
The star component of castor oil is ricinoleic acid, an unusual fatty acid that makes up ~80-92% of its composition.
In skincare, it is an emollient that dries down to a solid film with water-binding properties. This helps keep skin hydrated and helps reduce transepidermal water loss (TEWL).
A 2026 dermatology review pulls together its broader uses:
Human clinical testing found this ingredient to be non-irritating and non-sensitizing.
Because castor oil contains fatty acids in the C11-24 range, this ingredient may not be fungal acne safe.
At this time, the literature does not support castor oil in regrowing hair. A 2022 systematic review found no strong evidence that it supports hair growth and only weak evidence that it improves hair shine.
Castor oil itself carries "perfuming" and "masking" function tags according to the official CosIng database. This is because of its mild odor and odor-dampening properties.
Learn more about Ricinus Communis Seed Oil
