Customer Care
Shipping, returns & support
Everything you need to know about turnaround times, tracking your order, our returns policy, and reaching a human at Halcyon.
Order processing
1–2 business days
Orders placed before 3pm EST on business days are typically prepared and handed to the carrier within one business day. Blends and custom-lot requests may add 24–48 hours.
Domestic transit
2–4 business days
USPS Priority Mail and UPS Ground are our default domestic methods. Expedited overnight service is available at checkout for temperature-sensitive shipments.
International
7–14 business days
International shipments are quoted case-by-case and require destination-country import review before dispatch. Contact us before placing an international order.
Tracking
Follow your shipment from bench to door
A tracking number is attached to your order the moment your label is generated. You can retrieve it any time from your account.
- 01
Sign in
Open your account and select the order you'd like to track.
- 02
Copy the tracking number
Once your order is marked Shipped, its tracking number appears on the order detail.
- 03
Check the carrier site
Paste the number into USPS or UPS to see real-time transit updates.
- 04
Reach out if stalled
If tracking hasn't moved in 48 hours, email support and we'll investigate with the carrier.
Returns
Straightforward, science-first policy
14-day window on unopened vials
Unopened, factory-sealed vials may be returned within 14 days of delivery in original packaging for a full refund of product cost.
Opened vials are non-returnable
Because peptide research materials are lot-sensitive, opened vials cannot be accepted back into inventory.
Damaged or lost in transit
Report visible damage or a missing shipment within 5 business days and we'll replace or refund at no cost.
Cancellations
You may cancel from My orders while status is pending or processing.
Common questions
Before you email us
Most order questions are answered on the FAQ — ordering eligibility, documentation, packaging, and international rules.
- Support hours
- Mon–Fri, 12pm–8pm EST
- Shipping origin
- Cartersville, GA, USA
- meridianpeps@gmail.com
- Response time
- Within one business day
Support ticket
Talk to customer care
Send a message for shipping updates, tracking issues, returns, or a certificate of analysis. Include your order number if it relates to a specific shipment.