The sources used here do not test tretinoin combined with niacinamide and hyaluronic acid as one product. The niacinamide and hyaluronic acid findings come from separate studies of different products, and each is described below with its concentration and design where the source gives them. The DailyMed listing for a niacinamide 4% / tretinoin 0.05% cream carries the statement: "This drug has not been found by FDA to be safe and effective, and this labeling has not been approved by FDA."
What the sources do not test
None of the studies below gave participants a single product containing tretinoin, niacinamide and hyaluronic acid. The one study that paired niacinamide with tretinoin used a moisturizer and a tretinoin cream 0.025% (described further down). The others tested niacinamide or hyaluronic acid products on their own or against another treatment.
The DailyMed listing gives the marketing status of the niacinamide 4% / tretinoin 0.05% cream as "unapproved drug other". This guide uses the listing only for that status and the disclaimer.
Niacinamide in separate studies
The first two rows use the name nicotinamide, which is what those abstracts call the ingredient.
| Question | What the source says |
|---|---|
| 4% nicotinamide gel in acne? | A randomized, double-blind trial put 40 patients with moderate inflammatory facial acne vulgaris on topical 4% nicotinamide and 40 on 1% clindamycin gels, twice daily. Nicotinamide and clindamycin gels were significantly more efficacious in oily and non-oily skin types, respectively. No major side effect was encountered by any patient. |
| Nicotinamide against other acne treatments? | A Cochrane review of topical acne treatments reported that four studies evaluated nicotinamide against clindamycin or erythromycin, but none measured participants' global self-assessment of acne improvement. |
| Moisturizer with 5% niacinamide in aging facial skin? | A 12-week, double-blind, placebo-controlled, split-face randomized study in 50 women aged 40-60 years compared a moisturizer control with the same moisturizer containing 5% niacinamide. Niacinamide was well tolerated and provided significant improvements versus control in fine lines/wrinkles, hyperpigmentation spots, texture, and red blotchiness. |
| 4% niacinamide cream in melasma? | A double-blind randomized trial of 27 melasma patients applied 4% niacinamide cream to one side of the face and 4% hydroquinone (HQ) cream to the other for eight weeks. Good to excellent improvement was observed with niacinamide in 44% of patients, compared to 55% with HQ. |
The author affiliation listed for the 5% niacinamide moisturizer study is The Procter & Gamble Company, Cincinnati, OH, USA. The summaries used here do not describe tretinoin as part of any of these four products.
The paired study with tretinoin cream 0.025%
A paired double-blinded study in women with facial photodamage (Cutis 2006) compared two moisturizers. One contained a mixture of vitamins (niacinamide, panthenol, and tocopheryl acetate) to enhance stratum corneum barrier function. The other contained similar moisturizing ingredients but no vitamins. Tretinoin cream 0.025% was started 2 weeks in, per the abstract. The niacinamide concentration is not stated, and this guide does not report the number of participants or the study length.
The authors concluded that improving stratum corneum barrier function before beginning topical tretinoin therapy and continuing use of a barrier-enhancing cosmetic moisturizer during therapy facilitates the early phase of facial retinization and augments the treatment response. The vitamin mixture also contained panthenol and tocopheryl acetate, so the comparison does not isolate niacinamide. The comparison described is between two moisturizers used during tretinoin cream 0.025% therapy, not a single cream that combines tretinoin and niacinamide.
Hyaluronic acid
A literature review of topical hyaluronic acid (HA) in cosmeceuticals (Dermatol Ther 2022) stated that numerous studies support HA-based cosmeceuticals as a noninvasive, effective solution for improving skin hydration and rejuvenation. This is a review, not a trial. The sentence used here is about HA-based cosmeceuticals and names no concentration or tretinoin. The review's conflict-of-interest statement says one author is an employee of L'Oréal Paris, the manufacturer of the formulation under study.
What this does not tell you
No source here compares tretinoin alone with tretinoin plus niacinamide plus hyaluronic acid, for results or for irritation. The studies differ in concentration (4%, 5%, or not stated), design, condition (acne, aging skin, melasma, photodamage) and company ties, so their findings cannot be added together.
Nothing here shows that a compounded cream has the same results, strength, quality or approval status as an approved tretinoin product. FDA says "Compounded drugs are not FDA-approved. This means that FDA does not verify the safety, effectiveness or quality of compounded drugs before they are marketed." It also says drugs compounded in accordance with all conditions of section 503A are exempt from current good manufacturing practice requirements, labeling with adequate directions for use, and new drug approval requirements. A licensed provider decides what is suitable for a person.