Polynucleotides: Fish DNA or Legit Skin Regeneration? A No-BS Breakdown of the UK’s Top Brands

Polynucleotides aren’t fillers. They’re not HA boosters. They’re biostimulants — extracted from fish DNA — that repair damaged skin, stimulate collagen, and help your fibroblasts wake the hell up.
Picture of Dr. Harry Singh
Dr. Harry Singh

Dr. Harry Singh Author - UK's No1 Aesthetic Mentor

Polynucleotides aren’t fillers. They’re not HA boosters. They’re biostimulants — extracted from fish DNA — that repair damaged skin, stimulate collagen, and help your fibroblasts wake the hell up.
They’re not instant, not reversible, and not for the panicked bride 4 days before her wedding. But when used right? Total game changer for skin quality, scars, and even hair loss (should try it on my ever-receding hairline).

Let’s compare the top brands dominating UK clinics right now:

Plinest by Mastelli

The OG of fish DNA injectables. Solid Italian science behind it.
Good for: Ageing skin with dull texture. Works best in full-face protocols or under-eyes in thinner skin types. Be patient results don’t show up for at least 6–8 weeks.

Ameela Skin

Marketed as a “regeneration serum” but with nice results in elastic and thin skin areas.
This one’s particularly useful for delicate areas. Under-eyes and forehead in early ageing patients? Yes. Lip lines in ex smokers? Also yes. Don’t expect volume — expect bounce.

PhilArt by Croma

The one that came dressed for marketing. But don’t let the branding fool you — the Hair version is actually solid.

Nice choice if you’re looking to dip your toes in the polynucleotide pool. Bonus: You can cross-sell it with microneedling or PRP for hair restoration without a hard upsell.

Crystal PDRN

The “regeneration specialist.” Slightly more clinical in positioning — less gloss, more graft.
Often used in post-laser protocols or for scar correction. If your clinic does acne scarring or post-surgical skin repair — this is your tool.

TL;DR: What’s the Point?

Pick based on:

If you’re just injecting whatever’s on offer at your next training day, you’re not using polynucleotides — you’re gambling with fish juice.

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