--- title: "Retinaldehyde Night Serum — Evidence, Benefits & Where to Buy | Magellan" description: "Retinaldehyde Night Serum — Retinaldehyde (also called retinal or RAL) is a naturally occurring metabolite of vitamin A and the direct biosynthetic…" url: "https://magellanlongevity.com/p/178.md" canonical: "https://magellanlongevity.com/p/178.html" html: "https://magellanlongevity.com/p/178.html" type: "product" section: "Skin & Topical Longevity" evidence_grade: "Moderate evidence" evidence_tier: "moderate" citations: 19 product_id: 178 price_usd: 31.99 updated: 2026-09-02 author: "Gabriel Radu, DO" author_credentials: "Physiatrist (PM&R). NY medical license 275110. NPI 1376861765." publisher: "Magellan Longevity" content_format: "markdown" license: "Educational content — not medical advice" --- # Retinaldehyde Night Serum [Home](https://magellanlongevity.com/) › [Skin & Topical Longevity](https://magellanlongevity.com/c/6.md) › Retinaldehyde Night Serum **HTML version:** https://magellanlongevity.com/p/178.html · **In the Magellan app:** https://magellanlongevity.com/#/product/178 ## Key facts | Field | Value | | --- | --- | | Product | Retinaldehyde Night Serum | | Category | [Skin & Topical Longevity](https://magellanlongevity.com/c/6.md) | | Evidence grade | Moderate evidence (B) | | Peer-reviewed citations | 19 | | Typical listed price | $31.99 (check the live price) | | Where to buy | [Search Amazon](https://www.amazon.com/s?k=Retinaldehyde%20Night%20Serum&tag=magellanlong-20) | | Catalog ID | 178 | ## What it is Retinaldehyde (also called retinal or RAL) is a naturally occurring metabolite of vitamin A and the direct biosynthetic precursor of all-trans retinoic acid, the retinoid that binds nuclear retinoic-acid receptors to regulate keratinocyte proliferation and differentiation and dermal collagen metabolism. In the skin, retinaldehyde is oxidized in a single enzymatic step to retinoic acid, giving it retinoid activity with greater potency than retinol while causing less irritation than retinoic acid (tretinoin) itself. It is used in topical cosmeceutical and dermatological preparations, typically at 0.05-0.1%, to improve the appearance of photoaged skin. ## Its role in longevity Randomized controlled trials of topical retinaldehyde report improvements in fine lines, skin texture and hydration and other signs of photoaging, with tolerability better than prescription retinoic acid; in one trial a retinaldehyde cream matched a series of glycolic-acid peels on crow's-feet depth over eight weeks, and split-face testing shows objective, instrument-measured wrinkle and elasticity gains versus vehicle. Mechanistic and in vivo human studies of the broader retinoid pathway show that conversion to retinoic acid stimulates procollagen synthesis and suppresses collagen-degrading matrix metalloproteinases in aged and sun-damaged skin. However, retinaldehyde-specific trials are relatively few, small and short, often industry-linked, and they measure appearance endpoints rather than systemic aging; critical reviews caution that high-quality clinical evidence for cosmeceutical retinoids (as distinct from prescription tretinoin) remains limited. Much of the deepest mechanistic evidence derives from retinoic acid and retinol rather than from retinaldehyde directly. This evidence describes topical retinaldehyde and the retinoic-acid pathway it feeds, not this specific commercial serum product. ## Evidence grade: Moderate evidence - **What the grade means:** Curated grade based on the human and mechanistic evidence for this compound. - **Dose used in studies:** 0.05–0.1% topical, applied nightly - **What this grade does not say:** Several small RCTs (n = 23–40, 8–12 weeks) show objective, instrument-measured improvements in wrinkles, texture and pigmentation, with less irritation than prescription tretinoin — one cream matched a series of glycolic-acid peels. Trials are short, small and often industry-linked, and they measure appearance, not systemic aging. ## In the news - **Retinaldehyde serum improves skin texture, signs of photoaging in women** — Healio 2024 [Read it](https://www.healio.com/news/dermatology/20241122/retinaldehyde-serum-improves-skin-texture-signs-of-photoaging-in-women) > Results showed that the visibility of fine lines on the face and chest decreased by 12% and 19% at week 8 vs. baseline (P < .0001 for both). - **The Chemistry of Beauty: How Retinoids Enhance Skin Health** — News-Medical 2024 [Read it](https://www.news-medical.net/health/The-Chemistry-of-Beauty-How-Retinoids-Enhance-Skin-Health.aspx) > Retinol helps in the management of wrinkles, fine lines, and skin textures. Retinyl esters and retinaldehyde have stabilizing properties and can facilitate the treatment of wrinkles. ## The research Peer-reviewed studies on the active compound. Quotes are verbatim from the cited abstract. Research describes the active mechanism and is not a claim about this specific product. ### Cited studies 1. **Evidence: retinoic-acid precursor boosts collagen** Dermatology 1999 · [PMID 10473961](https://pubmed.ncbi.nlm.nih.gov/10473961/) · [DOI 10.1159/000051379](https://doi.org/10.1159/000051379) > Retinaldehyde is efficient and well tolerated for the improvement of the signs of photoaging 2. **Efficacy and safety of retinaldehyde 0.1% and 0.05% creams used to treat photoaged skin: a randomized double-blind controlled trial** J Cosmet Dermatol 2018 · [PMID 29663701](https://pubmed.ncbi.nlm.nih.gov/29663701/) · [DOI 10.1111/jocd.12551](https://doi.org/10.1111/jocd.12551) > both retinaldehyde creams afforded significant textural improvements, reduced water loss, increased hydration 3. **Retinaldehyde/hyaluronic acid fragments: a synergistic association for the management of skin aging** J Cosmet Dermatol 2011 · [PMID 21649816](https://pubmed.ncbi.nlm.nih.gov/21649816/) · [DOI 10.1111/j.1473-2165.2011.00552.x](https://doi.org/10.1111/j.1473-2165.2011.00552.x) > the 3-month application significantly improved overall photoaging 4. **Biological activities of topical retinaldehyde.** Dermatology 1999 · [PMID 10473955](https://pubmed.ncbi.nlm.nih.gov/10473955/) · [DOI 10.1159/000051373](https://doi.org/10.1159/000051373) > These studies indicate that topical RAL has biological activity and is well tolerated. 5. **Tolerance profile of retinol, retinaldehyde and retinoic acid under maximized and long-term clinical conditions.** Dermatology 1999 · [PMID 10473963](https://pubmed.ncbi.nlm.nih.gov/10473963/) · [DOI 10.1159/000051381](https://doi.org/10.1159/000051381) > The natural retinoids ROL and RAL do have a good tolerance profile, in contrast with the irritating potential of RA. 6. **Cosmeceuticals: the evidence behind the retinoids.** Aesthet Surg J 2010 · [PMID 20442078](https://pubmed.ncbi.nlm.nih.gov/20442078/) · [DOI 10.1177/1090820X09360704](https://doi.org/10.1177/1090820X09360704) > cosmeceuticals containing retinaldehyde have been shown in large randomized, controlled trials to have the most beneficial effect on aging skin. 7. **In situ antioxidant activity of a dermo-cosmetic product: A randomized controlled clinical study.** Exp Dermatol 2019 · [PMID 31309627](https://pubmed.ncbi.nlm.nih.gov/31309627/) · [DOI 10.1111/exd.14005](https://doi.org/10.1111/exd.14005) > The tested product significantly improved the skin antioxidant capacity after 15 and 30 days and significantly decreased the basal level of the skin LPO. 8. **Use of Retinoids in Topical Antiaging Treatments: A Focused Review of Clinical Evidence for Conventional and Nanoformulations.** Adv Ther 2022 · [PMID 36220974](https://pubmed.ncbi.nlm.nih.gov/36220974/) · [DOI 10.1007/s12325-022-02319-7](https://doi.org/10.1007/s12325-022-02319-7) > In general, there is a lack of evidence from properly designed clinical trials to support the claimed efficacy of the most commonly used retinoids as antiaging agents in cosmeceuticals. 9. **The role of retinoids in the prevention and repair of aged and photoaged skin.** Clin Exp Dermatol 2001 · [PMID 11696066](https://pubmed.ncbi.nlm.nih.gov/11696066/) · [DOI 10.1046/j.1365-2230.2001.00892.x](https://doi.org/10.1046/j.1365-2230.2001.00892.x) > Topical retinoids, namely tretinoin, have been proven to prevent and repair clinical features of photoageing; these processes are facilitated by an ability to prevent loss of collagen from, and stimulate new collagen formation in, the papillary dermis of sun-exposed skin. 10. **The mechanism of action of topical retinoids.** Cutis 2005 · [PMID 15773538](https://pubmed.ncbi.nlm.nih.gov/15773538/) > When topical tretinoin is applied to human skin, any collagen deficiency existing in photoaged skin is remedied at least partially, and the skin is primed to prevent further matrix degradation induced by solar UV. 11. **Vitamin A antagonizes decreased cell growth and elevated collagen-degrading matrix metalloproteinases and stimulates collagen accumulation in naturally aged human skin.** J Invest Dermatol 2000 · [PMID 10692106](https://pubmed.ncbi.nlm.nih.gov/10692106/) · [DOI 10.1046/j.1523-1747.2000.00902.x](https://doi.org/10.1046/j.1523-1747.2000.00902.x) > topical application of 1% vitamin A for 7 d increased fibroblast growth and collagen synthesis, and concomitantly reduced the levels of matrix-degrading matrix metalloproteinases. 12. **Retinoids suppress cysteine-rich protein 61 (CCN1), a negative regulator of collagen homeostasis, in skin equivalent cultures and aged human skin in vivo.** Exp Dermatol 2011 · [PMID 21488975](https://pubmed.ncbi.nlm.nih.gov/21488975/) · [DOI 10.1111/j.1600-0625.2011.01278.x](https://doi.org/10.1111/j.1600-0625.2011.01278.x) > Topical treatment with retinol (vitamin A, 0.4%) for 7days significantly reduced CCN1 mRNA and protein expression in both chronologically aged (80+years) and photoaged human skin in vivo, compared to vehicle-treated skin. 13. **A short-term screening protocol, using fibrillin-1 as a reporter molecule, for photoaging repair agents.** J Invest Dermatol 2001 · [PMID 11348454](https://pubmed.ncbi.nlm.nih.gov/11348454/) · [DOI 10.1046/j.1523-1747.2001.01322.x](https://doi.org/10.1046/j.1523-1747.2001.01322.x) > After application of 0.025% all-trans retinoic acid, there was increased deposition of both these dermal matrix components, with the aberrant elastic fibers no longer apparent. 14. **Retinoid therapy of pigmentary disorders.** Dermatol Ther 2006 · [PMID 17014483](https://pubmed.ncbi.nlm.nih.gov/17014483/) · [DOI 10.1111/j.1529-8019.2006.00085.x](https://doi.org/10.1111/j.1529-8019.2006.00085.x) > Topical retinoids such as all-trans-retinoic acid (RA), 13-cis-retinoic acid (isotretinoin), retinol, retinaldehyde, tazarotene, and adapalene have been shown to improve dyspigmentation of photodamaged skin including mottling and actinic lentigines. 15. **Peeling agents and irritants, unlike tretinoin, do not stimulate collagen synthesis in the photoaged hairless mouse.** Arch Dermatol Res 1996 · [PMID 8919045](https://pubmed.ncbi.nlm.nih.gov/8919045/) · [DOI 10.1007/BF02505265](https://doi.org/10.1007/BF02505265) > Microscopic measurements showed that the tretinoin-induced zone of new collagen was twice the depth of that induced by irritants or vehicle. 16. **Antiaging efficacy of a retinaldehyde-based cream compared with glycolic acid peel sessions: A randomized controlled study.** Journal of cosmetic dermatology 2018 · [PMID 30027612](https://pubmed.ncbi.nlm.nih.gov/30027612/) > Over 8 weeks, a retinaldehyde cream reduced crow's-feet wrinkle depth comparably to a series of glycolic-acid peels (STm −7.61%, P = 0.0007). 17. **The efficacy and safety of multilamellar vesicle containing retinaldehyde: A double-blinded, randomized, split-face controlled study.** Journal of cosmetic dermatology 2021 · [PMID 33569865](https://pubmed.ncbi.nlm.nih.gov/33569865/) > In a double-blind split-face trial (n = 23), a multilamellar-vesicle retinaldehyde cream produced objective improvements in wrinkle depth, elasticity and hydration versus the control side after 8 weeks. 18. **The Clinical Efficacy and Tolerability of a Novel Retinaldehyde Serum with Firming Peptides to Improve Skin Texture and Signs of Photoaging.** Journal of drugs in dermatology : JDD 2024 · [PMID 39496127](https://pubmed.ncbi.nlm.nih.gov/39496127/) > A retinaldehyde-plus-peptides serum improved skin texture and signs of photoaging with good tolerability in a 2024 clinical study. 19. **Evidence for the Efficacy of Over-the-counter Vitamin A Cosmetic Products in the Improvement of Facial Skin Aging: A Systematic Review.** The Journal of clinical and aesthetic dermatology 2021 · [PMID 34980969](https://pubmed.ncbi.nlm.nih.gov/34980969/) > A systematic review of over-the-counter vitamin A cosmetics found measurable improvement in facial skin aging, with retinaldehyde among the better-evidenced OTC retinoids. ## Where to buy [Search Amazon for Retinaldehyde Night Serum](https://www.amazon.com/s?k=Retinaldehyde%20Night%20Serum&tag=magellanlong-20) — affiliate search link. ## Structured data ```json {"@context":"https://schema.org","@graph":[{"@type":"ItemPage","@id":"https://magellanlongevity.com/p/178.html#page","url":"https://magellanlongevity.com/p/178.html","name":"Retinaldehyde Night Serum","description":"Retinaldehyde (also called retinal or RAL) is a naturally occurring metabolite of vitamin A and the direct biosynthetic precursor of all-trans retinoic…","inLanguage":"en","isPartOf":{"@type":"WebSite","name":"Magellan Longevity","url":"https://magellanlongevity.com/"},"author":{"@type":"Person","name":"Gabriel Radu, DO","jobTitle":"Physiatrist (PM&R)","identifier":[{"@type":"PropertyValue","name":"NPI","value":"1376861765"},{"@type":"PropertyValue","name":"NY medical 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Nothing here is intended to diagnose, treat, cure, or prevent any disease. Talk to your physician before starting any supplement or device, especially if you are pregnant, nursing, or taking medication. Editorial firewall: evidence grades are assigned from the published research and are independent of any affiliate commission. As an Amazon Associate, Magellan Longevity earns from qualifying purchases. Reviewed for accuracy by a board-certified physician (DO).