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★★★★★ 4.8/5 Very good (1,381 reviews)
ETERNA® Salmon DNA Body Serum
You lost the weight. Now reclaim your skin.
  • Firms & tightens loose, sagging skin on belly, arms & thighs
  • Visibly reduces cellulite and crepey skin
  • Lightweight - made for post-weight loss skin
Dermatologist Approved
More than 100 dermatologists & skin care professionals recommend ETERNA® PDRN Serum for its clinically proven regenerative properties.
Dr. Ji-Yeon Park | Biomedical Engineer
Dr. Ji-Yeon Park
Made For
Women who lost weight and are now facing the skin left behind — loose, crepey, sagging on the belly, arms, thighs and chest. If your body changed but your skin didn't follow, this is made for you.
Feels Like
Weightless. Absorbs in under 60 seconds. No grease, no residue. Leaves skin feeling tighter and more hydrated from the very first application.
When to Expect Results
Week 1: skin feels firmer and more elastic. Week 2–3: crepey texture on arms, belly and thighs visibly smooths. Week 4: loose skin looks tighter and more lifted — body, chest and neck. The full result.
How to Use
3–5 drops every morning on clean skin. Apply to belly, arms, thighs, chest and neck before moisturizer. Use daily — results compound over time. Compatible with tretinoin and all actives.
Free From
No fragrance. No alcohol. No harsh actives. Safe for sensitive and post-weight-loss skin — gentle enough for the areas where skin is thinnest.
Why It Works — 6 Ingredients, One Cascade
PDRN — Salmon DNA
After weight loss, skin loses the collagen scaffold that kept it firm. PDRN wakes up the cells that rebuild it — the same ingredient used in Rejuran injections, now in a daily dropper.
6-Types Peptide Complex
Six peptide classes working at once: tightening loose texture, rebuilding the collagen matrix, plumping stretched skin from within. No other PDRN serum uses six.
Niacinamide
Evens out skin tone after weight fluctuation. Fades stretch marks and discoloration. Strengthens the skin barrier so moisture stays locked in.
Aloe Vera
Calms reactive skin instantly. Also acts as a carrier — pushing PDRN and peptides deeper into loose skin where collagen rebuilding needs to happen.
Glutathione
Missing from virtually every PDRN serum. Fights the oxidative stress that makes skin look dull, stiff and aged after weight loss.
Sodium Hyaluronate
Low-molecular-weight HA that goes inside the dermis — not just the surface. Fills the space left by lost collagen with water. Visible plumping within the first week.
PDRN
Salmon DNA (PDRN)
  • Rebuilds collagen lost after weight loss
  • Firms and tightens loose skin from within
  • The injection ingredient — in a dropper
Peptides
6-Types Peptide Complex
  • Tightens loose, stretched skin texture
  • 6 classes — broader than any competitor
  • Amplifies PDRN's firming effect
Niacinamide
Niacinamide
  • Fades stretch marks & uneven skin tone
  • Strengthens skin barrier after weight loss
  • Makes skin less reactive and more resilient
Glutathione
Glutathione
  • Fights dullness and skin stiffness after weight loss
  • Keeps skin radiant after weight fluctuation
  • Absent from virtually every other PDRN serum
Sodium Hyaluronate
Sodium Hyaluronate
  • Fills space left by lost collagen with water
  • Plumps crepey skin on belly, arms & thighs
  • Visible bounce-back in week one
Real women who lost weight and refused to accept loose skin as permanent. Here's what they reported after 4 weeks of daily use:
93%
said loose, sagging skin on belly, arms and thighs looked visibly firmer
91%
said crepey texture smoothed out noticeably — even in the hardest areas
94%
of women considering a skin procedure say they no longer need one
89%
said their body looked more toned and lifted — without a single procedure

Orders are processed in 1–3 business days.

Delivery:

  • USA: 3–6 business days
  • UK: 4–7 business days
  • International: 5–10 business days

90-Day Guarantee — No Risk.
Try it for 90 days. If your skin doesn't look better, we refund you in full. You keep the bottle.

Amanda
93%
Said loose skin looked visibly firmer after weight loss
"Before I found this on Facebook, I felt hopeless about my loose skin after Ozempic. I tried everything, but nothing worked. After just two weeks, I saw an incredible difference — the crepey skin on my belly and arms is actually tightening. I feel so much more confident now."
Amanda R. | Verified Customer
Sandra
91%
Said crepey texture smoothed out noticeably
"Finally rocking a bikini after losing 30 lbs. I feel so much more confident — the loose skin on my belly that was holding me back is actually firming up. I noticed the difference after just 2 weeks. That's incredible."
Sandra K. | Verified Customer
Lauren
89%
Of women who were considering skin removal surgery after weight loss say they no longer need one
"I was skeptical — After losing 45 lbs with GLP-1, my doctor mentioned a skin removal surgery. I wasn't ready for that. I tried ETERNA® as a last resort — 4 weeks later, my thighs and arms look tighter than I ever thought possible without going under the knife. I cancelled the consultation."
Lauren K. | Verified Customer
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Fix Your Ozempic Body In Just 4 Weeks.

★★★★★

"I lost 35 lbs but the loose, crepey skin on my thighs stopped me from wearing shorts. Even in summer. After 3 weeks of ETERNA®, the texture is actually smoothing out. I finally feel confident again."

Amanda R. | Verified Customer
Loose skin firmedResults in 3 weeks
★★★★★

"The crepey skin on my thighs and stomach after weight loss was something I'd given up on. ETERNA® changed that. Week 4 — my skin feels tight and lifted. I can't stop touching it."

Sandra K. | Verified Customer
Crepey skin smoothedVisibly tighter
★★★★★

"I was skeptical — I'd tried every lotion after losing weight. Nothing worked on my loose arm skin. I wore long sleeves every day to hide them. After 4 weeks I finally feel comfortable in sleeveless again, and my husband loves it. Worth every penny."

Lauren K. | Verified Customer
Arms & belly firmedWorth every penny

Your Body Changed. Now Make Your Skin Catch Up.

Most products target collagen. ETERNA® with Salmon DNA goes deeper — straight to the elastin. It signals your skin cells to rebuild from within — firming and tightening the way it was before the weight loss.

1X
Body Lotions, Creams & Oils
1.5X
Collagen Supplements
3X
ETERNA® Salmon DNA Serum
3X More Cellular Regeneration Activity Compared to Standard Body Creams
ETERNA 4-Week Transformation

The ETERNA® Transformation

Results That Compound Every Week

Each week builds on the last.

Week 1

Skin feels more elastic — almost instantly.

Salmon DNA (PDRN) gets to work. Within the first few days, loose skin on your belly, arms and thighs feels noticeably more hydrated and resilient. The bounce-back begins.

Week 2

Crepey texture starts to smooth out

The 6 peptide complex starts tightening loose texture on the arms, belly and thighs. Skin looks more even, less wrinkled. It starts to feel like it has structure underneath again.

Week 3

Visibly firmer, visibly tighter

Loose skin on the stomach, chest and arms looks more toned and lifted. You start wearing things you'd avoided. The body you worked for is finally starting to show through your skin.

Week 4

The transformation people notice

Crepey texture is dramatically reduced. Loose skin is visibly firmer. Your body finally matches the effort you put into losing the weight. Friends start asking what changed — results speak for themselves.

One Formula. Feel Desirable Again.

Six clinically selected actives — each targeting a specific cause of loose, crepey skin after weight loss.

PDRN

Salmon DNA (PDRN)

  • Rebuilds elastin lost after weight loss
  • Firms and tightens loose skin on belly, arms & thighs
  • The injection ingredient — in a daily dropper
Peptides

6-Types Peptide Complex

  • Tightens loose, stretched skin texture
  • Rebuilds the collagen & elastin matrix underneath
  • 6 classes — broader than any single peptide serum
Niacinamide

Niacinamide (B3)

  • Fades stretch marks & uneven skin tone
  • Strengthens skin barrier after weight fluctuation
  • Makes skin less reactive and more resilient
Glutathione

Glutathione

  • Fights dullness and skin stiffness after weight loss
  • Keeps skin radiant after weight fluctuation
  • Absent from virtually every other PDRN serum
Sodium Hyaluronate

Sodium Hyaluronate

  • Fills space left by lost collagen with water from within
  • Plumps crepey skin on belly, arms & thighs
  • Visible bounce-back from week one

Frequently Asked Questions

Because creams, serums & supplements focus on collagen.. ETERNA® uses Salmon DNA to signal your skin cells to rebuild elastin from within. It doesn't hydrate the surface. It addresses why the skin went loose in the first place.
Yes — that's exactly what it was designed for. Apply 3–5 drops every morning and press into belly, arms, thighs and chest. Most women notice a visible difference in firmness and texture within 2–3 weeks.
Week 1: skin feels more elastic and hydrated. Week 2–3: crepey texture on arms, belly and thighs visibly smooths. Week 4: loose skin looks noticeably tighter and more lifted. That's why we give you a full 90-day supply — results keep compounding after week 4.
Yes. ETERNA® is fragrance-free, alcohol-free and non-comedogenic. PDRN's strongest clinical evidence is in barrier repair — it calms inflammation rather than triggering it. Safe for sensitive and reactive post-weight-loss skin.
Absolutely. Use ETERNA® in the morning, tretinoin or retinol at night. Because PDRN supports barrier repair, many women find it actually reduces the irritation retinoids cause.
PDRN is extracted from salmon DNA and has been used in clinical medicine for over a decade — mostly in Rejuran injections in South Korea. It activates the cells responsible for producing collagen and elastin. There is no detectable salmon odor in the finished formula.
Supplements add collagen. Collagen does not fix loose skin. Only elastin does — and that's all ETERNA® with Salmon DNA targets. It tells your skin to produce its own elastin, at the dermal level where it's actually used.
Not a replacement — but it's what makes procedures less necessary. PDRN rebuilds skin structure from within, improving actual firmness and elasticity over time. Many women find they no longer feel the need for a procedure after 4–6 weeks.
Yes. Niacinamide fades existing discoloration and stretch marks in 3–4 weeks. Glutathione stops new spots from forming. Both actives work together — treating what's already there and preventing the next round.
3–5 drops every morning on clean skin. Apply to belly, arms, thighs, chest and neck before moisturizer. Absorbs in under 60 seconds — no grease, no residue. Use daily — results compound over time.
When fat cells shrink faster than the skin can adapt, the collagen and elastin scaffolding underneath is left stretched and depleted. The skin loses its structure — leaving loose, crepey texture on the belly, arms and thighs. PDRN signals the skin to rebuild that scaffolding from the inside out.
Not at all. Zero detectable salmon odor. ETERNA® is completely fragrance-free — no added scent, no masking fragrance. Clean, neutral finish.
90-day money-back guarantee. Try it for 90 full days. If your skin doesn't look visibly firmer and tighter, we refund you in full — no forms, no questions, no auto-ship traps. You keep the bottle.
Yes. ETERNA® works on face, neck, chest, belly, arms and thighs — any area where skin has lost firmness or elasticity. One dropper does it all. Most women apply it head to toe every morning in under 60 seconds.
Same ingredient. Rejuran delivers PDRN by needle at $800–$1,200 per session. ETERNA® delivers it topically, daily — activating the same collagen and elastin rebuilding pathway. Results compound every day instead of fading between appointments.

Loved By Women.
Noticed By Others.

Real stories from women who wanted to feel irresistible and did.

Amanda
★★★★★

"I lost 40 lbs but my arms were still embarrassing me — loose, crepey skin that made me reach for long sleeves every single day. After 4 weeks of ETERNA®, my arms look and feel firm. My husband can't stop touching them. I've gotten more compliments in the last month than in the last 5 years.""

Amanda R. | Verified Customer
Loose skin firmedBody transformation
Sandra
★★★★★

"I looked at my neck in the mirror. The loose skin under my chin and around my neck was the first thing people noticed. After 4 weeks of ETERNA®, the double chin is almost gone and my neck looks tighter than it has in years. I've never felt so confident."

Sandra K. | Verified Customer
Crepey skin smoothedVisibly tighter
Lauren
★★★★★

"I lost 50 lbs and the loose skin on my belly was the one thing that kept me from feeling proud of what I'd achieved. I avoided anything cropped — anything that showed my stomach. Week 4 of ETERNA® — my belly skin is noticeably tighter and smoother. My husband keeps telling me how amazing I look."

Lauren K. | Verified Customer
Arms & belly firmedWorth every penny
90 Day Money-Back Guarantee

Not Your Average Skin-Firming Serum.

ETERNA PDRN Serum
Body Creams
Rebuilds elastin lost after weight loss ✓ ✕
Firms loose skin on belly, arms & thighs ✓ ✕
Smooths crepey texture from the inside out ✓ ✕
Safe for sensitive post-weight-loss skin ✓ ✕
Fragrance-free, no irritation ✓ ✕
90 Day Money-Back Guarantee

Try ETERNA® Risk-Free

The Skin You Had Before — Rebuilt In 4 Weeks.

Join 95,000+ women who stopped hiding and started feeling like themselves again — with one daily dropper.

No subscription required
Free shipping over $50
Results in 4 weeks
90-Day Money-Back Guarantee
Try ETERNA® for 90 full days. If your skin doesn't look visibly firmer, smoother and more lifted — contact us for a full refund. No forms. No questions. You keep the bottle. We're that confident it works.
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Loved by 95,000+ women