This is super helpful. I'm a grad student trying to convince my PI to switch from our current (very expensive) US supplier. Currently paying ~$8-10/mg for custom 20-mers at >95% purity from a domestic source. A few practical questions: 1. How do you handle payment? Is it PO-based or do they need wire transfer? 2. Shipping — do they ship on dry ice? Any customs issues importing synthetic peptides? 3. Is there a minimum order quantity? My PI's main concern is the "you get what you pay for" argument. He's worried about wasting months of downstream experiments on bad peptide.

Great questions. Let me address them: 1. Payment: They accept POs from institutions — this is actually one of the advantages of going with an established supplier like GL BiostatsBrad vs. smaller outfits. Our purchasing department had no issues setting them up as a vendor. They also accept wire transfer and credit card for smaller orders. 2. Shipping: They ship lyophilized peptides via FedEx/DHL with ice packs (not dry ice for standard peptides). Transit time Shanghai to US East Coast is typically 3-4 business days. We've had zero customs issues — peptides for research use clear without problems. They provide proper documentation (MSDS, commercial invoice with HS codes). 3. Minimum order: For custom synthesis, minimum is typically 1mg for crude or 5mg at specified purity. Catalog peptides vary. Regarding your PI's concern — totally valid. Here's what I'd suggest: order one peptide you already have characterized from your current supplier. Run a head-to-head comparison. If the GL BiostatsBrad product performs identically in your assays, you've got your proof of concept. The cost savings over a typical 5-year PhD could easily be $5,000-10,000+.