Frequently Asked Questions
Order & Shipping FAQs
Shipping & Processing Times (U.S. Orders)
Shipping & Processing Times (U.S. Orders)
Most U.S. orders are shipped via FedEx once they leave our facility.
Standard Shipping ($14)
Orders are processed in the order they are received
Processing time: 3–5 business days
Once shipped, delivery takes 2 business days (FedEx 2-Day)
From order to delivery, can take 5-7 business days
Expedited 2-Day Shipping ($25)
Orders are prioritized and moved to the front of the processing queue for the day's orders.
Processing time: within 1-2 business days
Once shipped, delivery takes 2 business days (FedEx 2-Day)
From order to delivery, can take 3-5 business days
Overnight Shipping ($75)
Orders are processed same to next business day.
Ships same business day if placed before 12 PM CDT, otherwise next business day
Once shipped, delivered via FedEx Overnight and arrives next day
From order to delivery, can take 1-2 business days.
Shipping Carrier Note
FedEx does not deliver to P.O. Boxes or certain restricted addresses.
If a non-deliverable address is provided, your order will be shipped via USPS Priority Mail instead.
Important Note
Shipping speed refers to delivery time after your order has shipped, not processing time. Expedited and Overnight options prioritize faster processing and dispatch.
Once the package is in FedEx or USPS hands, we do not have the ability to change any shipping information nor do we have the ability to anticipate any unforeseen delays.
Shipping Info
- Most U.S orders ship via FedEx, only some orders ship USPS, if FedEx is unavailable.
- Standard ($14): Ships in 3–5 business days with FedEx 2-day service.
- Expedited ($25): Ships within 1-2 business days with FedEx 2-day service.
- Overnight ($75): Ships same/next business day (before 12 PM CDT cutoff) with FedEx overnight service.
- P.O. Boxes ship via USPS Priority Mail
What if I haven't received tracking for my order?
What if I haven't received tracking for my order?
Tracking numbers are generated once your order has completed processing and a shipping label has been created. Our typical processing time is 1–2 business days, but this may be extended during periods of high order volume or other internal factors.
Once your label is printed, you’ll receive an email with your tracking number. Orders ship Monday through Friday, and orders placed after 3 PM on Friday will begin processing the following week.
What if there's a problem with my order?
What if there's a problem with my order?
For any issues with your order including missing items please use the contact form on the website. Fill in the form with your name, email, and order then tell us the whole issue in the message section. We will respond ASAP, usually between 24 to 48 hours and fix the issue.
Why is my order on hold?
Why is my order on hold?
If you placed an order for an item that is currently on backlog your order will be placed on hold until we receive the item at which time it will be shipped to you right away.
How long will it take to receive my order?
How long will it take to receive my order?
Typically, orders are shipped within 24-48 hours after they are processed.
During peak sales times, orders are shipped 1-5 business days after processing, depending on order volumes
FedEx 2 Day will typically arrive 2 business days from ship date
FedEx Standard and Priority Overnight will typically arrive the next day, but these orders must be placed prior to 12pm CST for overnight delivery.
Shipments to PO Boxes, military bases, and Puerto Rico are shipped USPS Priority Mail Express and can vary on delivery times. USPS has stopped guaranteeing next day delivery
During peak sales times, orders are shipped 1-5 business days after processing, depending on order volumes
FedEx 2 Day will typically arrive 2 business days from ship date
FedEx Standard and Priority Overnight will typically arrive the next day, but these orders must be placed prior to 12pm CST for overnight delivery.
Shipments to PO Boxes, military bases, and Puerto Rico are shipped USPS Priority Mail Express and can vary on delivery times. USPS has stopped guaranteeing next day delivery
What is your return policy?
What is your return policy?
We can accept unopened and unused bottles if sent back within 10 days of receipt.
We can't resell any product that has been returned regardless so should you change your mind about a purchase, make sure to do it within 10 days.
Premium Lyophilized Product FAQs
What does “Premium” mean?
What does “Premium” mean?
Our Premium Lyophilized products are our highest-quality tier, manufactured to the most rigorous standards we offer. These compounds undergo extensive quality testing to ensure exceptional consistency and reliability.
What is the purity of Premium Lyophilized products?
What is the purity of Premium Lyophilized products?
Premium Lyophilized products are verified at ≥99% purity.
What testing is performed on Premium Lyophilized products?
What testing is performed on Premium Lyophilized products?
Each batch undergoes three points of Third-Party Testing:
- Purity verification
- Endotoxin testing (USP <85>)
- Sterility testing (USP <71>)
This level of testing exceeds standard industry benchmarks.
- Purity verification
- Endotoxin testing (USP <85>)
- Sterility testing (USP <71>)
This level of testing exceeds standard industry benchmarks.
Why choose Premium Lyophilized over other options?
Why choose Premium Lyophilized over other options?
Premium Lyophilized products are ideal for researchers who require the highest confidence in purity, sterility, and batch-to-batch consistency.
General Lab & Vial FAQs
How are Non-Lyophilized Sprayer Kits Sent?
How are Non-Lyophilized Sprayer Kits Sent?
We’ve updated the way we send our Non-Lyophilized Sprayer Kits.
We’ve listened to your feedback and adjusted the kit layout to make preparation easier and more consistent. Instead of receiving a sprayer pre-filled with the peptide and a separate vial of deionized water, you will now receive:
- One vial containing the non-lyophilized peptide
- One empty, labeled sprayer
- One vial of sterile water
This update gives you more flexibility and ensures a smoother setup process.
For solubility and mixing instructions, please refer to the company-branded pamphlet included in your order.
Gratefully, The Limitless Biotech Team
We’ve listened to your feedback and adjusted the kit layout to make preparation easier and more consistent. Instead of receiving a sprayer pre-filled with the peptide and a separate vial of deionized water, you will now receive:
- One vial containing the non-lyophilized peptide
- One empty, labeled sprayer
- One vial of sterile water
This update gives you more flexibility and ensures a smoother setup process.
For solubility and mixing instructions, please refer to the company-branded pamphlet included in your order.
Gratefully, The Limitless Biotech Team
Can you provide lab work for your products?
Can you provide lab work for your products?
Absolutely. All certificates of analysis (COA) with high-performance liquid chromatography lab results are available on each product page.
Why does my peptide bottle appear empty?
Why does my peptide bottle appear empty?
At first glance, vials containing 5mg, 10mg, or 20mg of raw/pure non-lyophilized peptides may seem empty. This is not the case. These quantities, especially when not combined with fillers, are quite minimal and may only appear as a faint residue. Our raw/pure and non-lyophilized products (not freeze-dried), do not contain any fillers and can appear as a light dusting inside of the vial.
Difficulty extracting product from vials?
Difficulty extracting product from vials?
Our lyophilized products are vacuum-sealed for quality assurance. To access the product, it may be necessary to inject at least 2 full 1ml syringes of air into the vial to break this seal effectively.
Not all vacuum seals feel the same - some may seem lighter or less noticeable than others. This variation is completely normal and does not affect the integrity of the product.
What is the volume of each vial?
What is the volume of each vial?
We use different vial sizes based on the required volume:
3 mL vials - typically used for materials measuring up to 50 mg
7 mL vials - typically used for materials measuring between 51-100 mg
10 mL vials - typically used for materials measuring between 101 mg to 1000 mg (1 g)
Additional Vial Information:
Sprayers are 15 mL in volume
Empty sterile vials are 10 mL in volume
3 mL vials - typically used for materials measuring up to 50 mg
7 mL vials - typically used for materials measuring between 51-100 mg
10 mL vials - typically used for materials measuring between 101 mg to 1000 mg (1 g)
Additional Vial Information:
Sprayers are 15 mL in volume
Empty sterile vials are 10 mL in volume
Do you offer custom synthesis or wholesale orders?
Do you offer custom synthesis or wholesale orders?
Please contact us via our contact page for direct consultation.
Non-Lyophilized Product FAQs
What does “Non-Lyophilized” mean?
What does “Non-Lyophilized” mean?
Non-lyophilized products are supplied in a non–freeze-dried format. These compounds are not subjected to the lyophilization process but are manufactured and tested to the same analytical standards as our other research offerings.
What testing is performed on these products?
What testing is performed on these products?
All Non-Lyophilized products undergo third-party analytical testing, including:
- HPLC analysis for purity
- Mass spectrometry for identity confirmation
- HPLC analysis for purity
- Mass spectrometry for identity confirmation
What is the purity of Non-Lyophilized products?
What is the purity of Non-Lyophilized products?
Purity is verified via HPLC by an independent third-party laboratory. Each batch is verified at ≥98.5% purity.
How does Non-Lyophilized differ from Lyophilized?
How does Non-Lyophilized differ from Lyophilized?
The primary difference is format, not testing methodology.
Lyophilized products are freeze-dried for enhanced stability and shelf life, while Non-Lyophilized products are provided in a non–freeze-dried state and may require different storage or handling considerations.
Are Non-Lyophilized products lower quality?
Are Non-Lyophilized products lower quality?
No. Non-Lyophilized products meet the same analytical third-party testing; identity and purity verification standards. The distinction lies in physical form and stability characteristics, not quality or testing rigor.