Taking a specific type of hyaluronic acid pill every day for 3 months doesn’t make the deeper layer of your skin thicker, which means it probably only works on the top layer.
Claim Language
Language Strength
definitive
Uses definitive language (causes, prevents, cures)
The claim uses 'does not significantly alter' and 'indicating its effects are localized', which assert a conclusive absence of effect on the dermis and a specific biological localization, implying certainty rather than probability or association.
Context Details
Domain
medicine
Population
human
Subject
Oral administration of 100–200 mg/day of 300 kDa hyaluronic acid
Action
does not significantly alter
Target
dermis thickness in healthy Chinese women aged 18–65 over 12 weeks
Intervention Details
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Evidence from Studies
Supporting (0)
Contradicting (1)
Oral administration of hyaluronic acid to improve skin conditions via a randomized double‐blind clinical test
The study found that taking HA made the top layer of skin thicker, but it didn’t measure the deeper layer (dermis), so we can’t say whether the claim about the dermis being unchanged is true or false.