ALASTIN
vs ISDIN
Two formulas, with different prices and ingredient blends.
| What to compare | ALASTIN HA IMMERSE Serum | ISDIN Hyaluronic Concentrate |
|---|---|---|
| US reference price | $134 / 29.6 mL · $4.53/mL | $115 / 30 mL · $3.83/mL |
| HA forms | Sodium hyaluronate + crosslinked sodium hyaluronate | Low- and medium-molecular-weight HA, according to brand |
| Disclosed concentrations | Not disclosed | Not disclosed |
| Other ingredients to consider | Glycerin, dimethicone, sugar humectants, Octapeptide-45 | BioMarine extract, peptides, lentil extract |
| Format | Lightweight serum; pump | Water-gel; pump; satin finish |
| Evidence status | Brand-associated open-label research; no head-to-head comparison. | Brand user-perception claims plus ingredient-level HA evidence. |
The practical difference
ALASTIN: A hydration blend with both water-binding ingredients and a silicone base. Worth considering if you want a pump rather than a dropper.
ISDIN: The water-gel format and pump may appeal if you want a lightweight step under moisturiser.
What the comparison cannot tell you
ALASTIN: The peptide and HA-boosting claims do not establish superiority over the other serums.
ISDIN: The brand’s reported user-perception results are data on file, not a published head-to-head trial. Molecular weights in kDa are not supplied on the checked page.
These published details do not establish a clinical winner. No head-to-head study of this pair was identified in this review. Prices were checked 2 November 2026; confirm current local prices.
Read the ingredient evidence