Ingredient review
Day Lily & Honey Ferment
INCI: SACCHAROMYCES/DAY LILY FLOWER/HONEY FERMENT FILTRATE
A gentle, fermented ingredient that may help hydrate and calm the skin, but research is still emerging.
In plain English
This ingredient is made by fermenting day lily flowers and honey with yeast. Fermentation breaks down the plant and honey into smaller, potentially more skin-friendly molecules. It's used in skincare to add moisture and soothe irritation, similar to how other fermented ingredients like galactomyces work. Think of it as a gentle, watery extract that can help your skin feel soft and calm.
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
- biotech
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Day Lily & Honey Ferment 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 Day Lily & Honey Ferment.
- 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
A filtrate obtained after fermenting day lily flowers and honey with Saccharomyces (a type of yeast). The fermentation process creates a liquid rich in amino acids, sugars, and other beneficial compounds.
How it works
The fermentation process breaks down larger molecules into smaller ones, which may help them absorb better into the skin. The resulting filtrate provides hydration and may help calm redness or sensitivity by supporting the skin's natural barrier function.
Pros
Gentle hydration
Provides moisture without heavy oils or sticky residue, making it suitable for layering in a routine.
Soothing potential
May help calm redness and irritation, especially for those with reactive skin types.
Cons and cautions
Limited research
There are few peer-reviewed studies specifically on this ferment blend, so its benefits are largely based on anecdotal and general fermentation knowledge.
Varied effectiveness
The concentration and quality of the ferment can vary between products, so results may not be consistent.
Best for
- People with dry or dehydrated skin looking for gentle hydration
- Those with sensitive or easily irritated skin who want a soothing ingredient
Use caution if
- Individuals with a known allergy to yeast or fermented ingredients
Usage tips
Safety summary
Considered safe for topical use in cosmetics. The fermentation process reduces potential irritants, and the ingredient is generally well-tolerated. However, those with yeast allergies should patch test first.
Research notes
Research on this specific ferment is limited. General studies on fermented ingredients suggest they can improve skin hydration and barrier function, but more targeted studies are needed.
Common label clues
- Typical concentration
- 1-10% in leave-on products
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU when used as intended.
- Common uses
- Serums, Toners, Essences, Moisturizers
- Environmental note
- The fermentation process is relatively low-impact, but sourcing of day lily flowers and honey should be considered for sustainability.
Good to know
- Fermented ingredients are often used in K-beauty routines for their gentle, hydrating properties.
- This ingredient is typically clear or slightly yellow and has a mild, natural scent.
Common questions
What is Day Lily & Honey Ferment in beauty products?
This ingredient is made by fermenting day lily flowers and honey with yeast. Fermentation breaks down the plant and honey into smaller, potentially more skin-friendly molecules. It's used in skincare to add moisture and soothe irritation, similar to how other fermented ingredients like galactomyces work. Think of it as a gentle, watery extract that can help your skin feel soft and calm.
What does Day Lily & Honey Ferment do in a beauty product?
The fermentation process breaks down larger molecules into smaller ones, which may help them absorb better into the skin. The resulting filtrate provides hydration and may help calm redness or sensitivity by supporting the skin's natural barrier function.
Is Day Lily & Honey Ferment safe for most people?
Considered safe for topical use in cosmetics. The fermentation process reduces potential irritants, and the ingredient is generally well-tolerated. However, those with yeast allergies should patch test first.
Who should be careful with Day Lily & Honey Ferment?
Individuals with a known allergy to yeast or fermented 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.