Sesderma's liposomal delivery, decoded

A dermatologist's solution to an old formulation problem

Topical skincare has a stability problem. The most-effective actives — L-ascorbic acid, retinol, azelaic acid, glycolic acid, peptides — are also the most chemically unstable. L-ascorbic acid oxidizes within weeks of opening; retinol degrades under light and heat; azelaic acid crystallizes and separates; peptides denature in water-based formulations. The standard solution is to use derivatives (ethyl ascorbic acid instead of L-ascorbic, retinyl palmitate instead of retinol) — but derivatives are uniformly weaker than the parent actives.

Dr. Gabriel Serrano, a Valencia-based dermatologist, founded Sesderma in 1989 around a different solution: liposomal encapsulation. A liposome is a microscopic phospholipid vesicle — a tiny bilayer membrane that mimics the structure of human cell membranes and can carry an active payload inside. Encapsulating an unstable active in a liposome accomplishes three things at once: it protects the active from oxidation and light degradation, it delivers the active deeper into the skin (the liposome fuses with the cell membrane and releases its payload), and it allows lower concentrations of the active to deliver equivalent or better results.

The technology is real, well-published, and cosmetically validated. Almost every Sesderma product uses it. This is a guide to how the platform works and which Sesderma SKUs make the most of it.

How liposomal encapsulation actually works

A liposome is built from phospholipids — the same lipid family that makes up the human skin barrier and cell membranes. The phospholipids self-assemble into a bilayer sphere with a hydrophilic interior, which can carry water-soluble actives (vitamin C, peptides, hyaluronic acid) or with modifications can also carry fat-soluble actives (retinol, vitamin E).

The benefits, in order of importance:

1. Stability. A liposomal vitamin C serum doesn't oxidize the way a raw L-ascorbic serum does. The liposome shields the active from atmospheric oxygen, which means a Sesderma C-Vit serum can sit on your shelf for six months without turning brown — versus a raw L-ascorbic serum that browns in three to four weeks.

2. Penetration. Liposomes fuse with the lipid bilayer of skin cells and release their payload directly into the cell. This means a 1% liposomal retinol can deliver results comparable to a 0.5% raw retinol with less irritation. The active is delivered more efficiently rather than sitting on the surface.

3. Tolerance. Because less raw active sits on the skin surface, liposomal formulations tend to cause less irritation. Liposomal retinol initiates fewer purging episodes; liposomal vitamin C causes less stinging on sensitive skin; liposomal azelaic acid avoids the gritty texture that raw azelaic suspensions sometimes have.

The trade-off: liposomal encapsulation adds manufacturing complexity and cost. Sesderma's prices reflect this — the brand is generally pricier than non-liposomal Spanish equivalents, though still 40-60% cheaper than American liposomal competitors.

The Sesderma products that show the platform

C-Vit Liposomal Serum — the vitamin C anchor

The C-Vit Liposomal Serum is the brand's vitamin C flagship and the product most often imported by US consumers. Liposomal ascorbic acid (real L-ascorbic, not a derivative) plus ferulic acid + tocopheryl acetate for the SkinCeuticals-style synergy stack. Stability is the key advantage: the formula stays effective for six months from opening, versus three months for non-liposomal L-ascorbic alternatives. €44 for a 30ml bottle.

The C-Vit Radiance Fluid is the lighter, more recent version — same liposomal vitamin C in a fluid texture with ginkgo biloba for circulation/microvascular support and sodium hyaluronate for the hydration cushion. €48.

Azelac Ru Liposomal Serum — the post-inflammatory hyperpigmentation answer

Azelac Ru pairs liposomal azelaic acid (notoriously difficult to formulate at meaningful concentrations) with niacinamide + alpha-arbutin + Phyllanthus Emblica extract. The liposomal delivery solves azelaic acid's gritty-texture problem and lets the brand deliver clinical-grade concentrations in a serum that actually feels good on skin. The line is the dermatologist-default for post-inflammatory hyperpigmentation in Spanish dermatology. €36 for 30ml.

Reti-Age Antiaging Serum — the liposomal retinol entry

Reti-Age uses liposomal retinol at 0.1% — gentle by raw-retinol standards but delivering equivalent results to a 0.3% non-liposomal formula. Plus niacinamide + hyaluronic acid for buffering. The formula is the introduction-grade retinoid for clients who haven't tolerated raw retinol or retinaldehyde well. €40.

The Retises 0.50 Antiwrinkle Cream is the higher-strength liposomal retinol cream for clients who've already adapted to a starter retinoid.

Daeses Liposomal Serum — the multi-peptide firming

Daeses pairs four peptides — Argireline + Palmitoyl Tetrapeptide-7 + Palmitoyl Tripeptide-1 + Nicotiana Benthamiana hexapeptide-40 sh-Polypeptide-77 — in a liposomal carrier, plus DMAE for immediate firming. The Spanish biotech ingredient (Nicotiana hex-40, a plant-bioengineered peptide) is genuinely uncommon at this price tier. €70.

Atopises Moisturizing Cream — the atopic-skin specialist

Atopises is the brand's reactive/atopic skin specialty. Real ceramide pyramid (NP, AP, EOP) plus cholesterol, phytosphingosine, panthenol, and dipotassium glycyrrhizate (the soothing fraction of licorice). Fragrance-free, alcohol-free, formulated for eczema and atopic dermatitis. €35 for clinical-grade barrier repair.

How to layer Sesderma products

A typical Sesderma routine uses 2-4 of the brand's serums, layered by molecular weight (lightest to heaviest):

Morning:

1. Sensyses Cleanser (Hyaluronic for dry, Lightening for pigmentation)
2. C-Vit Liposomal Serum
3. Hidraderm Hyal Moisturizing Cream
4. Sunscreen (any modern broad-spectrum SPF 50+)

Evening:

1. Sensyses Cleanser
2. Reti-Age (3-4x weekly) OR Daeses Liposomal Serum (2-3x weekly)
3. Atopises Moisturizing Cream (if reactive) or Factor G Renew Cream

Twice weekly:

• Azelac Ru Liposomal Serum for post-inflammatory hyperpigmentation
• Acglicolic Classic Forte Serum (glycolic acid) for chemical exfoliation

The bottom line

Sesderma is what a dermatologist-founded brand looks like when the founder's research interest becomes the company's defining technology. The liposomal platform is real, scientifically validated, and genuinely solves the stability and penetration problems that plague unstable topical actives. The product line uses the technology consistently and competently across a wide range of concerns.

If you've been buying SkinCeuticals C E Ferulic and never tried the Spanish liposomal equivalent, the C-Vit Liposomal Serum is the best entry point. If your concern is post-inflammatory hyperpigmentation, the Azelac Ru is one of the most credible azelaic acid formulations on the market. And if you're starting a retinol journey for the first time, the Reti-Age is the gentlest and best-tolerated entry point in European pharmacy skincare.

Spanish biotech, Valencia-rooted, dermatologist-founded. The kind of brand that's exactly what it claims to be — and that's increasingly rare.