Vitamin K — Allergy Risk & Safety Profile
INCI: PHYTONADIONE
Also known as: Phytonadione, Vitamin K1
Key Facts
- CAS Number
- 84-80-0
- Category
- active
- Risk Level
- safe
- Common Allergen
- No
Is Vitamin K safe in cosmetics?
Vitamin K is rated safe risk in cosmetic products. It is not classified as a common allergen and is generally well-tolerated by most skin types.
What is Vitamin K?
Used in eye creams for dark circles. Helps with bruising and vascular issues.
Allergy & Safety Information
Vitamin K is considered safe for cosmetic use. No significant safety concerns have been identified at typical use concentrations. As with any cosmetic ingredient, discontinue use if irritation occurs.
About Active Ingredient Ingredients
Active ingredients are formulated to produce a specific skin benefit — exfoliation, brightening, anti-ageing, or acne treatment. They work by interacting directly with skin biology, which also means they carry higher irritation potential than passive ingredients like emollients or thickeners.
Relevance for Vitamin K: Actives often require an adjustment period during which temporary redness, dryness, or sensitivity is normal. However, persistent reactions after 4–6 weeks of use, or reactions that worsen rather than improve, suggest true intolerance. Introduce only one active at a time to identify the cause of any reaction.
How to Identify Vitamin K in Products
Cosmetic ingredients are listed by their INCI (International Nomenclature of Cosmetic Ingredients) name in descending order of concentration. To check whether a product contains Vitamin K, scan the ingredient list for its INCI name exactly as it appears above. Ingredients present at 1% or less may appear in any order after the 1% threshold.
Not sure if your products contain Vitamin K? Paste the ingredient list into the free ingredient checker to scan for Vitamin K and other allergens automatically.
Frequently Asked Questions
Is Vitamin K safe for sensitive skin?
Vitamin K is generally well-tolerated, even by sensitive skin types.
What products contain Vitamin K?
Vitamin K is found in various cosmetic and personal care products including skincare, haircare, and body care products.
What does Vitamin K do in cosmetics?
Vitamin K functions as a active in formulations.
Related Guides
Anti-Aging for Sensitive Skin
The safest actives for sensitive skin and how to use them.
How to Read Ingredient Labels
Decode INCI names and find hidden allergens in your products.
Find Your Skin Allergy Trigger
Step-by-step elimination method to identify your trigger.
Contact Dermatitis Guide
Symptoms, causes, patch testing, and treatment options.
Is Vitamin K causing YOUR skin reactions?
SkinDetekt tracks your products and reactions to find your personal triggers. Download the app to find out.
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