A pleasant, minimalist ferment essence in the SK-II mould at a fraction of the price, but exactly like that category, the appeal is largely the feel and the "glass skin" story rather than a quantified active. Fine as a fermented hydrating layer; do not buy it expecting a real, disclosed AHA dose.
- Evidence14 / 30
Strength of the research behind the key actives
- Galactomyces Ferment Filtrate (Pitera): limited evidence
The average of the key actives’ evidence grades.
- Potency14 / 25
Dosed at studied levels, not fairy-dusted
- Galactomyces Ferment Filtrate (Pitera): present, but below a studied dose
How strongly the actives are dosed, led by the strongest, not how many there are.
- Delivery & stability14 / 20
Delivery tech + packaging that protects fragile actives
- Delivery: standard
- Packaging: clear dropper
- No fragile actives here, so packaging barely moves the score.
Delivery tech plus packaging, and packaging only counts when actives are fragile.
- Formulation1 / 10
Disclosure, active breadth, and ingredient generation
- 0 of 1 actives disclose a concentration
- 1 key active (breadth credit caps at 3)
- No current-generation or synergy bonus
Disclosure, active breadth, and current-generation or synergistic actives.
- Value3 / 15
What a month of use costs vs. the category
- About $74 per month to use
- $35 for 50 ml, used about twice a day (about 1.75 ml each time), so a bottle lasts about 0.5 months
What a month of use costs: full marks at $6 a month or less, the floor at $60 a month or more.
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What’s inside
| Active | Disclosed | Dose |
|---|---|---|
| Galactomyces Ferment Filtrate (Pitera) | n/a | Light |
A multi-ferment essence built on Lactobacillus/Soybean Ferment Extract with pomegranate, barley and pear ferment filtrates, plus propanediol and glycerin, in a frosted glass dropper bottle. None of the individual ferments carries a disclosed percentage, so despite marketing language about a gentle AHA from the pomegranate ferment, there is no quantified acid here to score. It is mapped to the galactomyces-ferment slug as the closest cataloged fermented-essence analogue, since this blend is soybean-led rather than the galactomyces filtrate that slug is named for. Read it as a fermented hydration layer, not a disclosed exfoliant.
How it’s delivered
Air- and light-sensitive actives (vitamin C, copper peptides) lose potency fast in the wrong packaging, so delivery and the bottle are scored, not just what’s on the label.
The actives, explained
Cosmetic information for general education, not medical advice. The SerumProof score reflects our reading of publicly available research and formulation disclosures. See how scoring works.