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Rejuvaveen is an oat extract from oat bran (Avena sativa) grown in Sweden, produced by the British company Oat Cosmetics. It has the form of a fine cream-colore... read more
3,39 € incl. VAT
Rejuvaveen is an oat extract from oat bran (Avena sativa) grown in Sweden, produced by the British company Oat Cosmetics. It has the form of a fine cream-colored powder, cold-water dispersible, with the fully preserved active profile of oat bran.The extract contains ~30% oat beta-glucan, ~30% starch and ~5% lipids containing ceramides, triacylglycerols and sterols. Tryptophan in trace amounts (13 mg/100 g) complements the profile with an amino acid component. Oat beta-glucan has a linear structure with β-1,4 glycosidic bonds (70%) and β-1,3 bonds (30%) — thanks to this structure it penetrates through the intercellular matrix into the epidermis and dermis, where it acts directly at the cellular level.
Store in a dry, cool place, away from direct sunlight. The powder is hygroscopic — always close the container tightly after each use and prevent contact with water during storage. The product is intended for external use only.
Premixing is strongly recommended. Disperse the powder in a small amount of cold water (5–10% of the total water content in the formula) and add the resulting smooth dispersion to the finished emulsion at a temperature below 45 °C. Adding the powder directly into a hot emulsion may cause clumping and uneven distribution of beta-glucan throughout the volume.
Oat beta-glucan has a linear structure with β-1,4 (70%) and β-1,3 (30%) glycosidic bonds, which enables it to penetrate through the intercellular matrix into the epidermis and dermis. Yeast beta-glucan (Saccharomyces cerevisiae) has β-1,3 and β-1,6 bonds — its primary use in cosmetics is immunomodulatory, not penetrative. These are two molecularly different substances with different mechanisms of action.
Rejuvaveen is stable in the pH range 5.0–8.0. Formulations with AHA acids usually work at pH 3.5–4.5, which is below the recommended lower limit. If you want to use Rejuvaveen in such a formulation, we recommend verifying the stability of the specific combination before introducing it into production — degradation of beta-glucan at lower pH cannot be ruled out.
We do not recommend it. An aqueous dispersion without a preservative is not microbiologically stable and is prone to contamination. The powder, on the other hand, retains its stability long-term when stored dry. For each batch we recommend working directly with the powder — prepare the dispersion immediately before adding it to the formulation.
It is intentional. The manufacturer Oat Cosmetics preserves the entire natural profile of oat bran — without separating individual fractions. Starch contributes to the sensory profile of the formulation, the lipid fraction (ceramides, triacylglycerols, sterols) synergistically complements the lipid mantle of the skin barrier. The result is an ingredient with a more complex effect than isolated beta-glucan would have.
Yes. It acts synergistically with hyaluronic acid — hyaluronic acid retains water on the surface and in the upper layers of the epidermis, oat beta-glucan penetrates deeper and acts at the cellular level. With ceramides it complements the intrinsic lipid fraction of Rejuvaveen, thus jointly supporting the integrity of the skin barrier. No incompatibility with peptides has been observed — we recommend, as standard, to verify the stability of the combination in the specific formulation.
See also other active ingredients in the Handymade.sk range.
