Condition
    Moderate Evidence
    Effectiveness 4/5

    Hyaluronic Acid for Dry Skin

    Oral hyaluronic acid shows modest improvements in skin hydration in several small trials, mostly from Japan.

    Overview

    Oral hyaluronic acid shows modest improvements in skin hydration in several small trials, mostly from Japan.

    Verdict

    Mixed evidence

    How It Works

    Ingested HA is degraded to oligosaccharides that may reach the dermis and stimulate fibroblast HA synthesis, increasing water-binding capacity in the extracellular matrix.

    Dosing & Protocol

    Typical dose

    Recommended dose
    120-240 mg oral hyaluronic acid daily, taken as a single dose with food
    Expected timeframe
    6 weeks for early changes in skin hydration measures; 12 weeks for the full effect reported in trials.

    Protocol

    form
    Low-molecular-weight oral hyaluronic acid for absorption; a topical humectant serum applied to damp skin works by a different and more direct route
    duration
    6-12 weeks, matching trial length
    co factor
    Take with food. Pair with a topical ceramide or occlusive moisturiser and short lukewarm showers — barrier care outperforms any oral agent for dry skin
    titration
    Increase to 240 mg daily if there is no change at 6 weeks; trials used 120-240 mg daily and molecular weights from 300 Da to 800 kDa with broadly similar results
    starting dose
    120 mg oral hyaluronic acid daily with a meal

    Evidence

    What the studies say

    A systematic review of oral HA trials at 120-240 mg/day reported improved skin moisture and reduced wrinkle depth over 8-12 weeks. Trials were small, short and frequently manufacturer-funded.

    Oral administration of hyaluronic acid to improve skin conditions via a randomized double-blind clinical test

    Score: 7/10
    2023
    rct
    n=120

    Wang M, Zhang Y, Li X +1 more

    Oral hyaluronic acid significantly increased skin hydration and elasticity and reduced wrinkle depth versus placebo.

    View source

    Oral Hyaluronan Relieves Wrinkles and Improves Dry Skin: A 12-Week Double-Blinded, Placebo-Controlled Study

    Score: 6/10
    2021
    rct
    n=40

    Hsu TF

    The present findings indicate that oral ingestion of HA may suppress wrinkles and improve skin condition.

    View source

    Safety

    Caveats

    Evidence is mixed: trials are small, short and frequently manufacturer-funded, with modest hydration changes. Oral hyaluronic acid is well tolerated and safety data in pregnancy are limited, so topical care is preferable then. Dry skin with itch that disturbs sleep, or of sudden onset, warrants review for eczema, hypothyroidism or medication effects.

    Less likely to help if

    People whose dryness is driven by eczema, psoriasis, hypothyroidism, isotretinoin or diuretics, and anyone with an unaddressed skincare routine of hot showers and stripping cleansers.

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    Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.