Ingredient review
Red 7 Lake
INCI: CI 15850
A widely used synthetic red pigment that adds vibrant color to makeup, generally considered safe at low concentrations but may cause sensitivity in some individuals.
In plain English
Red 7 Lake is a synthetic dye that gives a rich red color to cosmetics like lipstick and blush. It is made by combining a red dye with a metal salt (like aluminum or calcium) to create a stable pigment that doesn't bleed or fade easily. While it's approved for use in many countries, some people with very sensitive skin may experience mild irritation.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Red 7 Lake is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Red 7 Lake.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Red 7 Lake is a synthetic organic pigment from the monoazo family, produced by reacting a red azo dye with a metal salt to form an insoluble lake pigment. It is listed as CI 15850 in the Color Index and is commonly used in cosmetics for its bright, stable red hue.
How it works
In a cosmetic product, Red 7 Lake sits on the surface of the skin or lips as a fine powder, reflecting and absorbing light to create a visible red color. Because it is insoluble in water and oils, it stays put without dissolving or migrating, providing long-lasting color in lipsticks and blushes.
Pros
Vibrant and stable color
Red 7 Lake delivers a bright, consistent red hue that resists fading and bleeding, making it ideal for long-wear makeup like lipsticks and blushes.
Widely accepted by regulators
Approved for cosmetic use by the FDA and EU authorities, it has a long history of safe use in color cosmetics at typical concentrations.
Cons and cautions
Potential for skin sensitivity
A small number of people may experience mild irritation or allergic reactions, especially those with very sensitive skin or a history of reactions to synthetic dyes.
Not natural or sustainable
As a synthetic petrochemical-derived pigment, it does not align with clean beauty or sustainability preferences, and its production has an environmental footprint.
Best for
- Anyone looking for a bold, long-lasting red lipstick or blush
- Makeup users who prefer synthetic colorants over natural ones like carmine
Use caution if
- Individuals with known sensitivity to azo dyes or lakes
- Those seeking exclusively natural or plant-based cosmetics
Usage tips
Safety summary
Red 7 Lake is considered safe for cosmetic use at typical concentrations by major regulatory bodies. However, as with any color additive, a small subset of individuals may experience mild irritation or allergic contact dermatitis. It is not known to be carcinogenic or toxic in approved amounts.
Research notes
Studies on CI 15850 (Red 7 Lake) indicate low acute toxicity and no significant skin sensitization in most people. The Cosmetic Ingredient Review (CIR) panel has reviewed similar azo lake pigments and found them safe for use in cosmetics when formulated within recommended limits. More research is limited but no major safety concerns have emerged.
Common label clues
- Typical concentration
- 0.1% to 5%
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (Annex IV) with concentration limits typically up to 5% in leave-on products. Always check local regulations as they may vary.
- Common uses
- Lipsticks, Blushes, Eye shadows, Nail polishes
- Environmental note
- Synthetic pigments like Red 7 Lake are derived from petrochemicals and are not biodegradable. Their production involves chemical synthesis that may generate waste, though manufacturers are increasingly adopting greener processes.
Good to know
- Red 7 Lake is often listed as CI 15850 on ingredient labels, so look for that number if you want to identify it.
- It is different from Red 7 (without lake), which is a dye that can stain, whereas the lake form is insoluble and sits on the surface.
Common questions
What is Red 7 Lake in beauty products?
Red 7 Lake is a synthetic dye that gives a rich red color to cosmetics like lipstick and blush. It is made by combining a red dye with a metal salt (like aluminum or calcium) to create a stable pigment that doesn't bleed or fade easily. While it's approved for use in many countries, some people with very sensitive skin may experience mild irritation.
What does Red 7 Lake do in a beauty product?
In a cosmetic product, Red 7 Lake sits on the surface of the skin or lips as a fine powder, reflecting and absorbing light to create a visible red color. Because it is insoluble in water and oils, it stays put without dissolving or migrating, providing long-lasting color in lipsticks and blushes.
Is Red 7 Lake safe for most people?
Red 7 Lake is considered safe for cosmetic use at typical concentrations by major regulatory bodies. However, as with any color additive, a small subset of individuals may experience mild irritation or allergic contact dermatitis. It is not known to be carcinogenic or toxic in approved amounts.
Who should be careful with Red 7 Lake?
Individuals with known sensitivity to azo dyes or lakes Those seeking exclusively natural or plant-based cosmetics
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.