Ingredient review
Indocyanine Green
INCI: Indocyanine Green
Indocyanine Green is a medical dye with no established role in everyday skincare; its use in cosmetics is experimental and not recommended for routine application.
In plain English
Indocyanine Green is a bright green dye that doctors inject into the bloodstream to take pictures of blood flow or the liver. In skincare, it is sometimes studied for light-based treatments, but it is not a typical ingredient in creams or serums you buy at the store. Using it without medical supervision could cause skin irritation or allergic reactions.
Review score
Safety, usefulness, and evidence
Higher-caution ingredient
The evidence base is still emerging, so marketing claims deserve extra caution.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- emerging
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Read the cautions before using
Indocyanine Green can be useful, but watch for some irritation potential.
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 Indocyanine Green.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
A synthetic, water-soluble dye that glows under near-infrared light, primarily used in medical diagnostics.
How it works
In a cosmetic product, Indocyanine Green would act as a colorant or a photosensitizer for light therapies, but it is not formulated for standard leave-on or rinse-off skincare.
Pros
Medical precision
Used in controlled medical settings for accurate imaging of blood vessels and liver function.
Light activation potential
May be used in experimental photodynamic therapy for skin conditions under professional supervision.
Cons and cautions
No cosmetic safety data
There are no established safety studies for Indocyanine Green in leave-on or rinse-off cosmetic products, so its long-term skin effects are unknown.
Risk of irritation and staining
Topical use can cause skin irritation, allergic reactions, and temporary green staining that is difficult to remove.
Best for
- Individuals undergoing specific medical imaging procedures
- Patients in clinical studies for light-based skin therapies
Use caution if
- Anyone looking for a safe, everyday skincare ingredient
- People with known allergies to iodine or dyes
Usage tips
Safety summary
Indocyanine Green is safe for medical diagnostic use under professional supervision, but its safety for cosmetic application is unproven and not recommended due to potential irritation and lack of regulatory approval.
Research notes
Research on Indocyanine Green focuses on medical imaging and photodynamic therapy; there are no peer-reviewed studies supporting its safety or efficacy as a cosmetic ingredient.
Common label clues
- Typical concentration
- Not applicable for cosmetic use
- Regulatory status
- Indocyanine Green is approved by the FDA as a diagnostic drug for injection, but it is not listed as a permitted cosmetic colorant or ingredient in the EU or US.
- Common uses
- Medical imaging, Diagnostic procedures
- Environmental note
- As a synthetic dye, its environmental impact in wastewater is not well studied; disposal should follow medical waste guidelines.
Good to know
- Indocyanine Green is sometimes confused with chlorophyll or other green plant extracts, but it is entirely synthetic.
- It is typically administered intravenously by a healthcare professional, not applied to the skin.
Common questions
What is Indocyanine Green in beauty products?
Indocyanine Green is a bright green dye that doctors inject into the bloodstream to take pictures of blood flow or the liver. In skincare, it is sometimes studied for light-based treatments, but it is not a typical ingredient in creams or serums you buy at the store. Using it without medical supervision could cause skin irritation or allergic reactions.
What does Indocyanine Green do in a beauty product?
In a cosmetic product, Indocyanine Green would act as a colorant or a photosensitizer for light therapies, but it is not formulated for standard leave-on or rinse-off skincare.
Is Indocyanine Green safe for most people?
Indocyanine Green is safe for medical diagnostic use under professional supervision, but its safety for cosmetic application is unproven and not recommended due to potential irritation and lack of regulatory approval.
Who should be careful with Indocyanine Green?
Anyone looking for a safe, everyday skincare ingredient People with known allergies to iodine or dyes
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.