Nº 28 Primer Serum
The Hourglass Cosmetics Nº 28 Primer Serum is a misc. Our analysis of its 47 ingredients (20 low-risk) rates it Excellent (91/100). Based on its ingredients, it looks well-suited to dry skin.
The Hourglass Cosmetics Nº 28 Primer Serum is a misc. Our analysis of its 47 ingredients (20 low-risk) rates it Excellent (91/100). Based on its ingredients, it looks well-suited to dry skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
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Cyclopentasiloxane
(Hair Conditioning, Skin Conditioning, Emollient, Solvent) |
Silicone
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Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning) |
Silicone
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Coco-Caprylate/Caprate
(Emollient, Skin Conditioning) |
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Dimethiconol
(Antifoaming Agent, Skin Conditioning, Emollient, Moisturising) |
Silicone
|
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Phenyl Trimethicone
(Antifoaming Agent, Hair Conditioning, Skin Conditioning) |
Silicone
|
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Octyldodecanol
(Fragrance, Skin Conditioning, Emollient, Perfuming, Solvent) |
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Prunus Amygdalus Dulcis Oil
(Skin Conditioning) |
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Dimethicone Crosspolymer
(Emulsion Stabilising, Hair Fixing, Suspending Agent Nonsurfactant, Viscosity Increasingagent Nonaqueous, Viscosity Controlling) |
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Helianthus Annuus Seed Oil
(Fragrance, Skin Conditioning, Skin Conditioning Emollient) |
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Oryza Sativa Bran Extract
(Skin Conditioning, Skin Protecting) |
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Citrus Limon Peel Oil
(Fragrance, Perfuming, Skin Conditioning) |
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lavandula angustifolia oil
(Fragrance, Tonic) |
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Rosmarinus Officinalis Leaf Oil
(Fragrance, Skin Conditioning) |
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Helianthus Annuus Extract
(Hair Conditioning, Skin Conditioning, Skin Conditioning Emollient) |
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aleurites moluccanus seed oil
(Skin Conditioning) |
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Borago Officinalis Seed Oil
(Emollient, Skin Conditioning) |
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Camellia Sinensis Seed Oil
(Humectant, Skin Conditioning) |
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corylus avellana seed oil
(Fragrance) |
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oenothera biennis oil
(Skin Conditioning Emollient) |
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Olea Europaea Fruit Oil
(Fragrance, Perfuming, Skin Conditioning) |
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Rosa Canina Fruit Oil
(Emollient, Skin Conditioning) |
|
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SIMMONDSIA CHINENSIS SEED OIL
(Hair Conditioning, Skin Conditioning, Skin Conditioning Emollient) |
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TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning) |
|
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rosmarinus officinalis leaf extract
(Antimicrobial, Fragrance, Skin Conditioning) |
|
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Amyris Balsamifera Bark Oil
(Masking, Perfuming) |
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Aniba Rosaeodora Wood Oil
(Astringent, Fragrance, Perfuming, Skin Conditioning, Tonic) |
|
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Cananga Odorata Flower Oil
(Masking, Perfuming) |
Bad for Sensitive Skin
|
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Citrus Aurantium Amara Leaf/Twig Oil
(Flavouring, Fragrance) |
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citrus aurantium dulcis peel oil
(Fragrance, Skin Conditioning) |
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Eucalyptus Globulus Leaf Oil
(Perfuming, Skin Conditioning) |
Bad for Sensitive Skin
|
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Eugenia Caryophyllus Leaf Oil
(Fragrance, Perfuming, Skin Conditioning, Tonic) |
|
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Pelargonium Graveolens Flower Oil
(Masking) |
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Styrax Benzoin Gum
(Film Forming, Masking, Perfuming, Skin Conditioning) |
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Thuja Occidentalis Leaf Oil
(Masking, Perfuming, Tonic) |
|
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Panthenyl Triacetate
(Antistatic Agent, Hair Conditioning) |
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Prunus Avium Seed Oil
(Emulsion Stabilising, Skin Conditioning, Skin Conditioning Emollient) |
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Tetrahexyldecyl Ascorbate
(Antioxidant, Skin Conditioning) |
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Retinyl Palmitate
(Skin Conditioning, Skin Conditioning Miscellaneous) |
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Rosa Damascena Flower Oil
(Masking, Skin Conditioning) |
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Vanilla Planifolia Fruit Extract
(Skin Conditioning, Skin Protecting, Smoothing) |
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Geraniol
(Fragrance, Masking, Tonic) |
Allergens
|
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Citronellol
(Fragrance, Masking) |
Allergens
|
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Citral
(Flavoring Agent, Fragrance, Masking) |
Allergens
|
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Linalool
(Fragrance, Deodorant, Masking) |
Allergens
|
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Limonene
(Deodorant, Perfuming, Solvent) |
Allergens
|
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Benzyl Benzoate
(Fragrance, Solvent, Antimicrobial, Masking) |
Allergens
|
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CI 15850
(Cosmetic Colorant) |
No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.
EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →
How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
Trust & honesty
Contains ingredients some choose to avoid or double-check while pregnant or nursing.
Topical retinoids (retinol, retinaldehyde, retinyl esters) are widely advised against in pregnancy as a precaution. The strongest evidence is for ORAL retinoids; topical absorption is low, but most clinicians err on the side of caution.
This is general information, not medical advice. Pregnancy guidance varies and depends on concentration and your individual situation — always check with your doctor, midwife or pharmacist. How we flag this.
The concentrations these actives are typically effective at in research — not a measurement of this product.
Most studied between 0.1% and 1%. Higher is not automatically better — irritation climbs with dose, so a well-formulated lower strength is often the sweet spot.
Retinyl Palmitate
L-ascorbic acid is usually used at 5–20% (around 10–15% is common). Above ~20% adds little and tends to irritate more; it also needs a low pH to work.
Tetrahexyldecyl Ascorbate
INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.
From the community
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