1% threshold (preservative boundary)
G_ONE_PERCENT_MARKERWhat does this word mean?
A regulatory threshold above which a substance must be managed as a preservative, used on ingredient lists to draw the line above 1%.
Expanded note
This is a purely inferential tool but a strong one: if PDRN appears before the preservative then its concentration exceeds 1%, and if it appears after then it is below 1%. The site database can locate this boundary for 99 products. WARNING: this is a relative inference and cannot be used to back out a specific ppm figure.
Not a generic example.
Measured in the site database, 99 products can be placed against the 1% boundary and of those only 3 place PDRN before the boundary while 53 place it after, meaning the vast majority of PDRN products contain less than 1%. Common boundary markers are Phenoxyethanol with a 1.0% cap, Potassium Sorbate at 0.6% and Chlorphenesin at 0.3%.
Related terms
Where this term appears
Educational reference only. This site does not provide medical advice, treatment courses, injection counts, clinic recommendations or price recommendations.
PDRN is not approved by the FDA for injection or any therapeutic use. Topical and injectable PDRN are parallel facts under different regulatory pathways and must not be directly equated.
PN is not PDRN. Evidence grades are labelled on every factual element; in vitro and animal research is never described as clinical efficacy.