How much bifida ferment lysate do you need? 10%+
The effective bifida ferment lysate percentage, by the vehicle-controlled trials, starts at 10%; no published dose comparison sets a ceiling.
Give it two to four weeks: that is when the change first became measurable.
how it was measured
Measured on clinician-graded and self-assessed skin dryness in reactive/sensitive skin, with lactic-acid stinging threshold and tape-strip barrier resistance as the slower endpoints; the first visit at which the change was measurable.PMID 19624730PMID 35861908PMID 38951050
What bifida ferment lysate percentage is effective?
One controlled reading at one concentration, run by L'Oreal: a cream with 10% Bifidobacterium longum lysate against the same cream without it, randomised and double-blind, in 66 women with reactive skin who applied it to face, arms and legs twice daily for 2 months.
10%+
The trials, and what they used
- Lactic acid stinging fell in the lysate group, more tape strips were needed to break the barrier, and dryness scores were lower from day 29 (Gueniche 2010).
- The cell work in the same paper ran at 0.3 to 1%, an order of magnitude below the cream.
- No dose comparison found and no independent replication; the 10% floor rests on that one trial, and finished products rarely declare how much lysate they carry.
Is more than 10% bifida ferment lysate better?
Nobody has measured it: no published dose comparison sets a ceiling for bifida ferment lysate, so a percentage above 10% is above the trials' floor, not above a measured maximum.
No published dose comparison sets a ceiling for bifida ferment lysate. A declared percentage above 10% is above the trials' floor, not above a measured maximum: the trials say from 10% it works, and say nothing about whether more does more.
What does the bifida ferment lysate percentage on a label tell you?
A name that states a percentage ("Bifida Ferment Lysate 10%") is the only amount a cosmetic label ever declares, so it is the one number that can be read against the trials: at or above the 10% floor, or below it.
A name without a percentage leaves the position. The rules make a brand list ingredients in descending order of amount down to 1%, and in any order below it, so bifida ferment lysate above the 1% line is at least 1% and bifida ferment lysate below it can be any trace the brand likes. The floor the trials worked from is 10%, and a position alone cannot tell you whether a label reaches it.
The bifida ferment lysate percentages in our catalogue
No product in our catalogue is sold on bifida ferment lysate yet.
Read on
- Bifida Ferment Lysate: the glossary page what it does, who it suits, where it fits
Other actives with a dose the trials pinned:
- Niacinamide 2%+
- Vitamin C (LAA) 5%+
- Retinol 0.075 to 0.3%
- Salicylic acid (BHA) 0.5%+
- Lactic acid 8%+
- Glycolic acid 5%+
- Retinal 0.05 to 0.1%
- Retinyl Retinoate 0.06%+
- Tretinoin 0.025%+
- Adapalene 0.1%+
- Tazarotene 0.045%+
- Azelaic Acid 15%+
- THD Ascorbate 1%+
- Sodium Ascorbyl Phosphate 5%+
- Palmitoyl Pentapeptide-4 0.0003%+
- Caffeine 2%+
- Benzoyl Peroxide 2.5 to 5%
- Tea Tree Oil 5%+
- Hydroquinone 4%+
- Thiamidol 0.2%+
- Cysteamine 5%+
- Menthol 0.1 to 5%
- Peppermint Oil 0.5%+
- N-Acetyl Glucosamine 2%+
- Alpha Lipoic Acid 5%+
- Ammonium lactate 12%+
- Acetylated Hyaluronic Acid 0.1%+
- 4-n-Butylresorcinol 0.1%+
- 4-t-Butylcyclohexanol 0.4%+
- Sphingomonas Ferment Extract 2%+