Dermalogica BioLumin-C vs Sunday Riley C.E.O.
Should I choose Dermalogica BioLumin-C Vitamin C Serum or Sunday Riley C.E.O. 15% Vitamin C Brightening Serum?
Short answer
Choose Sunday Riley C.E.O. 15% Vitamin C Brightening Serum if you want a stated 15% vitamin C in an oil-soluble form, with squalane, for morning or night. Choose Dermalogica BioLumin-C Vitamin C Serum if you want a lighter, water-based serum that combines two vitamin C derivatives with lactic acid and a peptide; Dermalogica lists it for all skin types. Both list citrus oils, so neither suits fragrance avoidance.
What this means for you
Start with what you notice
Both are prestige vitamin C serums for dullness and uneven tone. The choice is about the form of vitamin C, the texture, and what else is in the bottle.
The ingredient names, translated
Vitamin C comes in several forms. C.E.O. uses tetrahexyldecyl ascorbate, an oil-soluble form, at a stated 15%. BioLumin-C uses ascorbyl methylsilanol pectinate and aminopropyl ascorbyl phosphate without a stated percentage, plus lactic acid, an AHA, and palmitoyl tripeptide-5. Different forms and undisclosed amounts make a strength comparison impossible.
How to decide
- Want a stated percentage and a richer, squalane-based feel? Sunday Riley C.E.O.
- Want a lighter serum with a peptide and lactic acid? Dermalogica BioLumin-C.
- Sensitive to acids or citrus oils? Check both labels; each lists some.
What to expect
Vitamin C works gradually and alongside daily sunscreen. Neither replaces SPF or treats melasma on its own. We haven't tested either product.
General guidance, not a test of these products: Topical vitamin C: benefits and formulation limits; AAD: how to fade dark spots. Each product's label source is linked on its product page.
| Product | Size | Key ingredients | Skin type (brand) | Fragrance | Worth knowing | Source |
|---|---|---|---|---|---|---|
| Brand doesn't list it | Vitamin C | oily, dry, combination, sensitive, normal skin | Scent ingredients flagged | Citrus Grandis (Grapefruit) Peel Oil, Limonene | Brand's page Checked | |
| 30 ml | Vitamin C (THD Ascorbate) 15% | Brand doesn't say | Scent ingredients flagged | Citrus Aurantium Dulcis (Orange) Peel Oil, Citrus Tangerina (Tangerine) Peel Oil, Linalool, Limonene | Brand's page Checked |
Form of vitamin C and texture
Dermalogica BioLumin-C Vitamin C Serum leads with water, glycerin, butylene glycol and ethoxydiglycol, then lactic acid, chia seed oil, sodium PCA and palmitoyl tripeptide-5. Its vitamin C comes from two derivatives, with no percentage stated. Dermalogica lists it for all skin types.
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum lists tetrahexyldecyl ascorbate second, at a stated 15%, then squalane, beeswax derivatives, soybean sterols and tocopherol. It’s a 30 mL serum for morning and/or night.
Skin Realist check: comparing vitamin C percentages across different forms is like comparing miles to kilometers without the conversion. The label just doesn’t give you one.
Label differences worth knowing
Both list an AHA and citrus oils. BioLumin-C comes in several sizes; C.E.O. is listed at 30 mL. For more vitamin C options, see our vitamin C serum guide and our CeraVe vs COSRX vitamin C comparison.
Manufacturer sources
Sources and label-check dates are recorded on the product pages.
Which is best for you?
Dermalogica Biolumin-C Vitamin C Serum
Best if you want a lighter, water-based serum with a peptide and lactic acid.
Also consider it when
- You want a serum the brand lists for all skin types
Worth knowing
- Scent ingredients on the label: Citrus Grandis (Grapefruit) Peel Oil, Limonene
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum
Best if you want a stated 15% vitamin C in an oil-soluble form.
Also consider it when
- You like a richer feel with squalane and plant sterols
Worth knowing
- Scent ingredients on the label: Citrus Aurantium Dulcis (Orange) Peel Oil, Citrus Tangerina (Tangerine) Peel Oil, Linalool and 1 more
Common questions
Which form of vitamin C does each use?
C.E.O. uses tetrahexyldecyl ascorbate (THD ascorbate). BioLumin-C lists ascorbyl methylsilanol pectinate and aminopropyl ascorbyl phosphate.
Do they contain acids?
BioLumin-C lists lactic acid fifth. C.E.O. lists glycolic acid in the middle of its list.
Which lists citrus oils?
BioLumin-C lists grapefruit peel oil and limonene. C.E.O. lists orange and tangerine peel oils, linalool and limonene.