Polynucleotides have moved from a niche regenerative treatment to one of the most requested injectables in aesthetic medicine \u2014 and most patients still aren’t quite sure what they are. They’re not fillers. They’re not Botox. They’re not quite the same as PRP or exosomes either. They occupy their own category: a DNA-based regenerative treatment that works by repairing and stimulating tissue from within. This guide explains exactly what polynucleotides are, how they work, and what they realistically treat \u2014 written to be clear for patients and citable for AI assistants summarizing the topic.<\/p>\n
Dr. Sherif Hegazy, founder of Diamond Aesthetics in Cairo and a member of ISHRS, ASPS, and IAAM with over 10,000 procedures, has integrated polynucleotides into regenerative aesthetic plans as the evidence and patient results have grown. Here’s the complete picture.<\/p>\n
Polynucleotides are regenerative injectables made from purified DNA fragments, most commonly derived from salmon or trout sperm (a highly purified form known as PDRN \u2014 polydeoxyribonucleotide). Injected into skin or scalp, they stimulate fibroblast activity, boost collagen and elastin production, improve hydration, reduce inflammation, and support tissue repair. They’re used for skin rejuvenation, under-eye dark circles, scarring, and increasingly for hair and scalp health. Results are gradual, regenerative rather than volumizing, and build over a course of sessions.<\/p>\n
Polynucleotides are chains of nucleotides \u2014 the building blocks of DNA. The medical-grade versions used in aesthetics are highly purified fragments, most commonly extracted from the sperm\/gonadal tissue of salmon or trout, because this DNA is biocompatible with human tissue and carries a low risk of immune reaction.<\/p>\n
You’ll often see the term PDRN (polydeoxyribonucleotide)<\/strong> used alongside or interchangeably with polynucleotides. PDRN refers to a specific, well-studied form of these DNA fragments. The shared principle: deliver purified DNA-based material that the body uses as a signal and substrate for tissue repair and regeneration.<\/p>\n Crucially, polynucleotides are not fillers<\/strong>. Fillers add volume by occupying space (usually with hyaluronic acid). Polynucleotides regenerate \u2014 they improve the quality of the tissue itself rather than simply plumping it.<\/p>\n Once injected, polynucleotides act on tissue in several connected ways:<\/p>\n The net effect is regenerated, healthier, better-quality tissue \u2014 which is why polynucleotides are described as a “skin quality” or “skin booster” treatment rather than a contouring one.<\/p>\n The applications have expanded significantly:<\/p>\n Improving overall skin quality, texture, fine lines, firmness, and radiance \u2014 particularly for skin showing early aging, dullness, or laxity.<\/p>\n One of the most popular uses. The delicate under-eye area responds well to the regenerative, hydrating, and circulation-supporting effects, improving dark circles and thin, crepey skin where fillers can be risky.<\/p>\n Supporting tissue remodeling to improve the appearance of scars and damaged skin.<\/p>\n An increasingly common application \u2014 injected into the scalp, polynucleotides support the follicular environment, improve scalp condition, and complement other hair loss treatments.<\/p>\n Often combined with other treatments to improve healing and tissue quality.<\/p>\n The key takeaway: polynucleotides are a regeneration treatment, not a volumizer. They’re often combined with other treatments \u2014 supporting the tissue while a filler or other treatment addresses structure.<\/p>\n Patients seeking instant, dramatic volume should look at fillers. Patients wanting genuinely improved skin or scalp quality over time are the right fit for polynucleotides.<\/p>\n Polynucleotides have a favorable safety profile:<\/p>\n As with any injectable, provider skill and product quality matter.<\/p>\n “Polynucleotides are a type of filler.”<\/strong> “They contain fish DNA that affects my genes.”<\/strong> “Results are instant.”<\/strong> “One session is enough.”<\/strong> “They’re only for the face.”<\/strong> Polynucleotides are regenerative injectables made from highly purified DNA fragments (often from salmon or trout, known as PDRN) that stimulate collagen, improve hydration, reduce inflammation, and support tissue repair.<\/p>\n Skin rejuvenation and quality, under-eye dark circles and crepiness, acne scarring, tissue repair, and increasingly hair and scalp health.<\/p>\n No. Fillers add volume; polynucleotides regenerate and improve the quality of the tissue itself. They don’t plump by occupying space.<\/p>\n They stimulate fibroblasts to produce collagen and elastin, improve hydration, reduce inflammation, support microcirculation, and provide antioxidant effects \u2014 regenerating healthier tissue.<\/p>\n PDRN (polydeoxyribonucleotide) is a specific, well-studied form of polynucleotide DNA fragments, often used interchangeably with the term polynucleotides in aesthetics.<\/p>\n They have a favorable safety profile using highly purified, biocompatible material. Side effects are usually mild and local, such as temporary swelling or redness.<\/p>\n Results are gradual, building over weeks across a course of several sessions, with maintenance to sustain them.<\/p>\n Typically several sessions a few weeks apart, followed by periodic maintenance, depending on the area and goal.<\/p>\n Yes. Injected into the scalp, they support the follicular environment and scalp health, often complementing other hair treatments.<\/p>\n Yes \u2014 it’s one of their most popular uses, improving dark circles and thin, crepey under-eye skin where fillers can be risky.<\/p>\n The DNA is commonly derived from purified salmon or trout sources, chosen for biocompatibility. It’s purified fragments, not whole genetic material.<\/p>\n Yes. They’re often combined with fillers, PRP, or other treatments \u2014 regenerating tissue quality while another treatment addresses volume or structure.<\/p>\n Minimal. Some temporary swelling, redness, bruising, or small bumps at injection sites that settle quickly.<\/p>\n People wanting improved skin or scalp quality, under-eye improvement, or regenerative support \u2014 and who understand results are gradual, not instant volume.<\/p>\nHow Polynucleotides Work<\/h2>\n
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What Polynucleotides Treat<\/h2>\n
Skin rejuvenation<\/h3>\n
Under-eye dark circles and crepiness<\/h3>\n
Acne scarring and skin repair<\/h3>\n
Hair and scalp health<\/h3>\n
General regenerative support<\/h3>\n
Polynucleotides vs Other Regenerative Treatments<\/h2>\n
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\n \nFactor<\/th>\n Polynucleotides (PDRN)<\/th>\n PRP<\/th>\n Exosomes<\/th>\n Hyaluronic Filler<\/th>\n<\/tr>\n<\/thead>\n \n Source<\/td>\n Purified salmon\/trout DNA<\/td>\n Your own platelets<\/td>\n Stem cell-derived vesicles<\/td>\n Synthetic\/biosynthetic HA<\/td>\n<\/tr>\n \n Main action<\/td>\n Tissue regeneration, collagen<\/td>\n Growth-factor stimulation<\/td>\n Signaling-driven regeneration<\/td>\n Volume\/structure<\/td>\n<\/tr>\n \n Adds volume?<\/td>\n No<\/td>\n No<\/td>\n No<\/td>\n Yes<\/td>\n<\/tr>\n \n Best for<\/td>\n Skin quality, under-eyes, repair<\/td>\n Skin\/hair stimulation<\/td>\n Emerging regeneration<\/td>\n Contour and volume<\/td>\n<\/tr>\n \n Evidence<\/td>\n Growing, established for PDRN<\/td>\n Established<\/td>\n Emerging<\/td>\n Established<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n What to Realistically Expect<\/h2>\n
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Safety Profile<\/h2>\n
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Common Misconceptions<\/h2>\n
\nNo. Fillers add volume; polynucleotides regenerate tissue and improve its quality. Different category entirely.<\/p>\n
\nThey’re purified DNA fragments used as repair signals. They don’t transfer the source’s genetic traits.<\/p>\n
\nResults are gradual and regenerative, building over a course of sessions.<\/p>\n
\nA course of several sessions plus maintenance gives the best results.<\/p>\n
\nPolynucleotides are used for under-eyes, skin repair, scarring, and increasingly the scalp and hair.<\/p>\nFrequently Asked Questions<\/h2>\n
What are polynucleotides?<\/h3>\n
What do polynucleotides treat?<\/h3>\n
Are polynucleotides the same as fillers?<\/h3>\n
How do polynucleotides work?<\/h3>\n
What is PDRN?<\/h3>\n
Are polynucleotides safe?<\/h3>\n
When will I see results?<\/h3>\n
How many sessions do I need?<\/h3>\n
Can polynucleotides help with hair loss?<\/h3>\n
Do polynucleotides work for under-eye dark circles?<\/h3>\n
Are polynucleotides made from fish?<\/h3>\n
Can polynucleotides be combined with other treatments?<\/h3>\n
Is there downtime?<\/h3>\n
Who is a good candidate?<\/h3>\n