Oral Hyaluronic Acid for Skin: What Two Trials Measured

Hyaluronic acid supplements are sold for skin hydration and wrinkles. Before adding one to your routine, look past the ingredient name to the dose, formulation and outcome in the cited trial. A positive hydration reading does not tell you how much improvement you will notice in the mirror.

The 150-person trial used a daily liquid

A study published online in December 2025 randomized 150 healthy adults to 60 mg or 120 mg sodium hyaluronate daily, or placebo, for 12 weeks. Participants drank 15 mL of the assigned solution each morning. The ingredient had a molecular weight of 1.8 MDa. The primary cheek-hydration analysis included 147 people.¹

Both doses improved measured cheek hydration relative to placebo at three months. Three-dimensional profiling also found reduced crow’s-feet wrinkle depth. However, questionnaire responses showed no corresponding difference in perceived hydration between groups; those responses were analyzed descriptively, without statistical testing.¹

The trial enrolled white adults aged 18–60 with Fitzpatrick skin types I–III. It excluded pregnancy, lactation and skin disorders, limiting how broadly its results apply. Contipro funded the research, and six authors were employees. The paper states that the company had no role in conducting, analyzing or publishing the study. Its ClinicalTrials.gov registration was retrospective.¹

The smaller trial used a capsule

A 2021 study analyzed 40 healthy Asian men and women aged 35–64. Participants took 120 mg hyaluronan daily or a dextrin placebo for 12 weeks. The active product was a specified Kewpie ingredient, rather than a generic combination of “beauty” nutrients.²

At week twelve, measured facial hydration was higher in the supplement group. Absolute hydration measurements on the arm and waist did not significantly differ between groups. Analyses of percentage change from each person’s starting value produced additional positive findings.²

The same distinction matters for the facial photographs: absolute wrinkle scores did not significantly differ, while percentage-change comparisons favored hyaluronan at eight and twelve weeks. That is more precise than saying every skin or wrinkle measurement improved.²

Kewpie funded the study, and three authors were employees. Its small sample and short duration cannot establish lasting benefit after stopping, or equivalent results from a different capsule.²

What to ask before paying

For a product citing either paper, ask whether it contains the studied ingredient, daily amount and formulation. The liquid trial does not prove that a lower-dose gummy or a mixed collagen-and-hyaluronic-acid powder performs the same way. Neither trial compared the supplement directly with a moisturizer.¹²

NCCIH cautions that retail supplements may differ from products used in studies. It also advises discussing supplement use with your healthcare team, particularly alongside medicines, with medical conditions, before surgery or during pregnancy. Do not use a twelve-week cosmetic trial as a complete safety assessment for your circumstances.³

If you decide to discuss a trial of use, define the result you care about: less tightness, less visible fine lines or another specific change. An expensive subscription is difficult to judge against a promise as broad as “better skin.” Keep the product name, daily amount and start date with your notes.

Keep the daily basics in the budget

The AAD recommends starting with sunscreen and moisturizer. Its sunscreen criteria are broad-spectrum protection, SPF 30 or higher and water resistance. A moisturizer can reduce the appearance of fine lines. Those recommendations remain relevant when an oral supplement reports a positive device measurement.⁴

The Skin book’s appointment guidance asks you to bring the whole history of products and treatments you have tried, with photographs if names are difficult to remember. Include supplements in that account, along with what changed and what you hoped would change. See the book.