sky peptide FAQ

State the supplier transition explicitly in your methods section and cite the reason: "Peptides were sourced from Blue Sky Peptide (2019–2022) and subsequently from Real Peptides (2023–present) following the former supplier's closure. All peptides were verified via HPLC to ≥98% purity, and dose-response validation was performed during the supplier transition to ensure experimental consistency." Peer reviewers and grant officers understand supplier disruptions. What they scrutinize is whether you validated the transition rather than assuming equivalence. Including the validation step in your methods demonstrates experimental rigor rather than introducing concern about result reproducibility.

Transition to Real Peptides by treating it as a peptide source validation rather than a simple replacement. Run a side-by-side comparison using your existing assay: order the equivalent peptide from Real Peptides, reconstitute both according to your established protocol, and test dose-response curves in parallel. Synthesis purity differences between suppliers can shift effective concentration ranges by 10–20%, so what worked at 5 µM with Blue Sky may require adjustment to 4 µM or 6 µM with Real Peptides. Document the new optimal concentration in your protocol notes and re-optimize any multi-peptide combinations where synergistic effects were previously established.

Contact Real Peptides directly through the technical support line. Many peptides marketed under proprietary names are standard sequences available under different nomenclature. Provide the peptide sequence if known, or describe the research application and biological target. In our experience, 70–80% of "unique" peptides are actually catalog compounds with modified names. If the peptide truly is a custom sequence, Real Peptides offers custom synthesis services with the same quality control and documentation standards applied to catalog products, typically with 4–6 week lead times for sequences under 40 amino acids.

Inspect the package immediately upon arrival. Real Peptides includes temperature monitoring strips that indicate whether the shipment exceeded 8°C during transit. If the strip shows a temperature excursion, document it with photos and contact customer support before opening the peptide vial. Lyophilized peptides that remained below 8°C during shipping should be transferred to −20°C storage immediately and are stable for 12–24 months. Once reconstituted with bacteriostatic water, store at 2–8°C and use within 28 days for most peptides. Some sequences with known oxidation-prone residues (methionine, cysteine) may require shorter use windows. Real Peptides provides sequence-specific stability guidance in the technical documentation included with each order.

Do not assume product-level COAs apply to the batch you received. Request batch-specific documentation before reconstituting the peptide. If the vendor cannot or will not provide it, that peptide's purity is unverified. Product-level certificates document historical performance, not current batch quality. Real Peptides includes batch-specific COAs with QR-linked third-party test results in every shipment, eliminating the need to request documentation separately.

Request a replacement batch immediately and document the variance. Legitimate suppliers like Real Peptides will retest the batch through third-party labs and either issue a replacement or provide updated documentation. Purity discrepancies above 1% suggest either synthesis batch contamination or degradation during shipping. Both are supplier accountability issues, not researcher error. Do not proceed with experimental protocols using peptides that deviate from documented purity thresholds.

Contact Real Peptides directly. Custom synthesis requests for research-grade peptides are standard practice. Most sequences Blue Sky offered (BPC-157, TB-500, Dihexa, Selank, Semax) are available through current suppliers, but obscure sequences may require custom synthesis runs. Custom synthesis typically adds 4–6 weeks to delivery timelines and requires minimum order quantities (usually 10–50mg), but purity and verification standards remain identical to catalog products.