Lyophilized powder is stable for 24–36 months when manufactured at -20℃, sealed, protected from light, and with a desiccant. For short-term working storage, 2–8℃ is also acceptable (do not exceed 6–24 months depending on the brand). Do not store in the refrigerator door or near fruits and vegetables, as the powder will absorb moisture with slight temperature changes.
For reconstitution, use only BAC water (containing benzyl alcohol for antibacterial purposes). Slowly push along the bottle wall; do not pour directly onto the powder, do not shake or toss, and gently roll for 2–5 minutes. A correctly prepared solution should be clear with a light blue tint (the Cu²⁺ color of GHK-Cu). If the blue color disappears, the solution becomes cloudy, or there are clumps, discard the product immediately; this indicates either incomplete dissolution or copper dissociation.
After reconstitution, store at 2–8℃ protected from light and use within 30 days (GHK-Cu is more delicate in water than the two peptides; after 30 days, the copper color may fade and activity may decrease). Never freeze the liquid. Freezing it even once will cause Cu²⁺ to dissociate and BPC to aggregate, rendering the entire bottle unusable.
In summer, if the bottle is warm from being exposed to the sun at the courier station for half a day, it's fine for research purposes, but don't gamble with it if you're going to inject it yourself. Check the temperature upon receiving the package; if it's warm, return it to the seller, don't keep it yourself.
Dispensing strategy: This bottle contains 70 mg of total peptides. Dispensing 2 mL of BAC yields a total concentration of 35 mg/mL (BPC 5 / GHK-Cu 25 / TB500 5 mg/mL). If you don't use it all at once, don't repeatedly take it in and out at room temperature. After each dispensing, immediately cap it back and refrigerate it.