Cerebrolysin FAQ: Storage, Mixing and Stability

The questions below are the ones researchers ask most about storing, mixing and handling Cerebrolysin. Each answer reflects what Cerebrolysin is, a mixture of free amino acids and short peptides from digested pig brain protein, and links to the fuller page where there is one.

How long does Cerebrolysin last in the fridge after mixing?

Mixed with bacteriostatic water and kept at 2 to 8 °C in the dark, Cerebrolysin lasts 8 to 12 weeks under Vistara Labs’ handling guidance, with quality slowly fading from around week 6 to 8. No published stability study covers Cerebrolysin in solution, so the window is the general peptide guidance. The full table is on how long Cerebrolysin lasts.

How long does unmixed Cerebrolysin powder last?

No supplier data sheet we could open gives a shelf-life figure for the powder. The general approach applies: keep the sealed vial dry, dark and cold, in the fridge for near-term work or the freezer for longer holds. Days at room temperature in transit do not harm the dry cake, so it ships without an ice pack.

Why does Cerebrolysin have no sequence or molecular weight?

Because it is a mixture, not one molecule. It is made by controlled enzymatic digestion of pig brain proteins, and one mass spectrometry study identified 638 distinct peptides in a single sample, mainly fragments of tubulin, actin and myelin basic protein, alongside free amino acids (Gevaert et al., Drug Testing and Analysis, 2015).

Is a yellowish Cerebrolysin powder normal?

It can be. A supplier data sheet describes the material as a white to yellow powder. What matters more is that the mixed solution is clear with no particles, and that its colour does not darken or change over time.

What do you mix Cerebrolysin with?

Bacteriostatic water, which is sterile water with 0.9% benzyl alcohol so a refrigerated vial can be accessed more than once. The preservative matters more than usual here, because a solution of amino acids and peptides can support microbial growth if contaminated. The reasons are on the Cerebrolysin solubility guide.

How much bacteriostatic water goes in a 60 mg Cerebrolysin vial?

There is no single correct volume. With 3 mL a 60 mg vial gives 20 mg/mL; with 6 mL it gives 10 mg/mL. More water spreads the same amount of material through a larger volume, so check the vial has headspace and write the chosen concentration on it. The tables and calculator are on the Cerebrolysin reconstitution page.

Should Cerebrolysin be dissolved in acetic acid?

No. Dilute acetic acid is used in labs for hydrophobic or basic peptides that resist water, but Cerebrolysin dissolves in water without it. Acid would speed hydrolysis and aspartate cleavage across hundreds of components at once, with nothing gained.

Why is my Cerebrolysin cloudy after mixing?

Brief cloudiness that clears within 10 to 15 minutes is usually trapped air, or a large cake that has not finished dissolving. Haze that persists or appears later, strands, particles or darkening point to warm storage, freezing or contamination, and in a nutrient-rich solution contamination can mean growth. The solution is discarded. More in why peptides gel or go cloudy.

Can you freeze mixed Cerebrolysin?

Not a vial that will be opened again. Repeated freezing and thawing promotes aggregation in peptide solutions, and in a mixture the least soluble fragments are the first to come out of solution. Laboratories that need frozen solution divide it into single-use aliquots and thaw each one once. Sealed powder can be frozen, kept dry.

Does Cerebrolysin need to be kept out of the light?

Yes. Its main parent proteins, tubulin and actin, contain tryptophan and tyrosine, so the mixture is all but certain to carry them, and their photo-oxidation products are yellow. Keeping the vial boxed in the dark protects it, and it also keeps the vial away from warmth.