Frequently Asked Questions

Most U.S. orders are shipped via FedEx once they leave our facility.

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.

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.

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.

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

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.

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

Absolutely. All certificates of analysis (COA) with high-performance liquid chromatography lab results are available on each product page.

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.

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.

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

Please contact us via our contact page for direct consultation.

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.

Premium Lyophilized products are verified at ≥99% purity.

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.

Premium Lyophilized products are ideal for researchers who require the highest confidence in purity, sterility, and batch-to-batch consistency.

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.

All Non-Lyophilized products undergo third-party analytical testing, including:

- HPLC analysis for purity
- Mass spectrometry for identity confirmation

Purity is verified via HPLC by an independent third-party laboratory. Each batch is verified at ≥98.5% purity.

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.

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.