Facial Treatment Essence
Reviewed by SerumTruth Editorial · Updated July 2026
The essence that built a cult, and a pleasant fermented hydrator, but the evidence is limited and mostly brand-led while the price is extraordinary for a single-ingredient story. You are paying for the name and the ritual far more than for proven actives.
- Evidence14 / 30
Strength of the research behind the key actives
- Galactomyces Ferment Filtrate (Pitera): limited evidence
- Score is the average of the key actives’ evidence grades.
- Potency21 / 25
Dosed at studied levels, not fairy-dusted
- Galactomyces Ferment Filtrate (Pitera) (>90%): dosed at a studied level
- Potency tracks 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.
- Formulation6 / 10
Disclosure, active breadth, and ingredient generation
- 1 of 1 actives disclose a concentration
- 1 key active (breadth credit caps at 3)
- No current-generation or synergy bonus
- Value3 / 15
What a month of use costs vs. the category
- About $121 per month to use
- $185 for 160 ml, used about twice a day (about 1.75 ml each time), so a bottle lasts about 1.5 months
- Band: $6/month or less earns full marks, $60/month or more hits the floor.
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What’s inside
| Active | Disclosed | Dose |
|---|---|---|
| Galactomyces Ferment Filtrate (Pitera) | >90% | Studied |
A famous single-ferment essence built on over 90% galactomyces ferment filtrate, branded as Pitera, in a clear glass bottle you shake into your hands. It is a hydrating, conditioning first-step layer aimed at the appearance of a smoother, brighter-looking complexion. It is essentially one ferment blend plus preservation, so there is little else on the label.
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.