Ingredient review
Menaquinone-7
INCI: MENAQUINONE-7
Menaquinone-7 is a vitamin K2 form that may help firm skin and fade dark circles, but research in cosmetics is still early.
In plain English
Menaquinone-7 is a type of vitamin K2. In skincare, it's thought to help strengthen blood vessel walls and reduce the look of under-eye circles or bruising. It also acts as an antioxidant, protecting skin from damage. However, most evidence comes from oral supplements or lab studies, not direct topical use on skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- natural
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Menaquinone-7 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 Menaquinone-7.
- 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
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
Menaquinone-7 (MK-7) is a fat-soluble vitamin from the vitamin K2 family, naturally found in fermented foods like natto. It plays a role in calcium regulation and blood clotting in the body.
How it works
In cosmetics, menaquinone-7 is believed to support skin microcirculation and strengthen capillary walls, which may reduce the appearance of dark circles and bruising. It also has antioxidant properties that help neutralize free radicals.
Pros
Targets dark circles
May help reduce the look of under-eye darkness by supporting blood vessel health, a common cause of discoloration.
Antioxidant support
Helps protect skin from environmental stressors like pollution and UV damage, which can accelerate aging.
Cons and cautions
Limited topical research
Most studies on menaquinone-7 are for oral use or lab models; direct evidence for skincare benefits is still emerging.
Stability challenges
The ingredient can degrade in light and air, so products need opaque, airtight packaging to remain effective.
Best for
- People concerned with under-eye dark circles
- Those looking for antioxidant support in anti-aging routines
Use caution if
- Individuals with known vitamin K allergies (rare)
- Pregnant or nursing women should consult a doctor before using new ingredients
Usage tips
Safety summary
Menaquinone-7 is considered safe for topical use at typical concentrations. Irritation and allergy are rare, but patch testing is recommended for new products.
Research notes
Evidence for menaquinone-7 in skincare is preliminary. Some small studies and anecdotal reports suggest benefits for dark circles and firmness, but larger clinical trials are needed.
Common label clues
- Typical concentration
- 0.01% to 0.1% in leave-on products
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets; not classified as a drug.
- Common uses
- Eye creams, Anti-aging serums, Firming lotions
- Environmental note
- Sourcing from natto fermentation is generally sustainable, but check for soy origin if you have allergies.
Good to know
- Menaquinone-7 is different from vitamin K1 (phylloquinone), which is more common in skincare
- It is often derived from fermented soy (natto), so those with soy allergies should check the source
Common questions
What is Menaquinone-7 in beauty products?
Menaquinone-7 is a type of vitamin K2. In skincare, it's thought to help strengthen blood vessel walls and reduce the look of under-eye circles or bruising. It also acts as an antioxidant, protecting skin from damage. However, most evidence comes from oral supplements or lab studies, not direct topical use on skin.
What does Menaquinone-7 do in a beauty product?
In cosmetics, menaquinone-7 is believed to support skin microcirculation and strengthen capillary walls, which may reduce the appearance of dark circles and bruising. It also has antioxidant properties that help neutralize free radicals.
Is Menaquinone-7 safe for most people?
Menaquinone-7 is considered safe for topical use at typical concentrations. Irritation and allergy are rare, but patch testing is recommended for new products.
Who should be careful with Menaquinone-7?
Individuals with known vitamin K allergies (rare) Pregnant or nursing women should consult a doctor before using new ingredients
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.