What to Look for in Lyophilized Peptides¶

Lyophilized peptides are freeze-dried powder stored in small glass vials. They look like a white or off-white powder or "cake" at the bottom of the vial.

The appearance can give you helpful clues about quality, but remember: only independent lab testing (COA) can truly confirm purity and identity. Don't rely on appearance alone.

✅ Good Signs¶

• Solid cake at the bottom of the vial
• White or slightly off-white color
• Powder is not sticking to the glass
• No liquid inside the vial (it should be dry)

⚠️ Warning Signs¶

• No cake at all (looks empty)
• Wet or melted powder
• Strange colors (yellow, brown, etc.)
• Floating particles or broken glass inside

📸 Visual Examples¶

🔍 The Bottom Line¶

Your eyes are not enough. Even if the powder looks perfect, it could still be fake or impure.

Always ask your seller for a recent COA (Certificate of Analysis) from an independent lab. This is the only real proof of what you're buying.