1.What are peptides?

Peptides are short chains of amino acids that act as signaling molecules in biological systems, supporting a range of functions like recovery, metabolism, and cellular health in research settings.

2.Are your peptides for human consumption?

No. All products sold by Sleek Peptides are strictly intended for laboratory research use only and are not for human or animal consumption.

3.Are your peptides tested for purity?

Yes! Every batch is third-party lab tested for purity and quality to meet research-grade standards. Certificates of Analysis (COAs) are available upon request, though they may not be automatically included with every order.

4.How should peptides be stored?

Lyophilized (powder) peptides should be stored in a cool, dry place or refrigerated. Once reconstituted, they should be kept refrigerated and used within a short period for the best stability.

5.Do you provide Certificates of Analysis (COA)?

COAs are available for most products. If you need one, just send us an email at info@sleekpeptides.com with your order details, and we’ll be happy to share it.

6.Where do you source your peptides from?

Our peptides are manufactured by certified laboratories following strict quality and safety protocols, so you can count on consistent purity and performance for your research.

7.How are orders shipped?

Orders are processed Monday–Friday (excluding holidays). Most orders placed are shipped within 48 hours, and you’ll receive a tracking link once your package is on its way.

8.Do you offer free shipping?

Yes! Free expedited shipping is automatically applied to all orders over $300 — no code needed at checkout.

9.Do you ship internationally?

Absolutely! We ship to most countries worldwide. You can check if we deliver to your location during the checkout process.

10.What payment methods do you accept?

We accept major credit cards, debit cards, and select digital payment methods, depending on what’s available at checkout.

11.How can I track my order?

Once your order ships, you’ll receive an email with a tracking link. Please note that tracking may initially show “label created” until the carrier physically picks up the package.

12.What if my package is lost or delayed?

If tracking shows no delivery updates, please reach out to us. We’ll help file an inquiry with the carrier. Refunds or replacements are only issued once the carrier confirms the package is lost.

13.What happens if my address is incorrect?

Customers are responsible for entering accurate shipping details. If a package is returned due to an incorrect or incomplete address, it can be resent at the customer’s expense.

14.Can I cancel or change my order?

Orders can only be changed or canceled before they enter fulfillment. Once payment is processed, all sales are final — even if the package hasn’t left our facility yet.

15.What is your refund policy?

Due to the sensitive nature of research chemicals, all sales are final. We only consider replacements for products damaged during transit or with a verified manufacturing defect, which must be reported within 72 hours of delivery.

16.How do I contact customer support?

You can reach us anytime at info@sleekpeptides.com. We typically respond within 24 hours on business days.

17.Are your products legal to purchase?

Our products are intended for research purposes only. It’s the buyer’s responsibility to ensure compliance with all local laws and regulations in their jurisdiction.

18.Do you offer bulk or wholesale pricing?

Yes! We offer discounts for bulk orders and recurring purchases. Email us at info@sleekpeptides.com for a custom quote.

19.How are peptides reconstituted?

Reconstitution should only be performed by qualified researchers using bacteriostatic water or another suitable solvent under sterile laboratory conditions.

20.Why choose Sleek Peptides?

We combine rigorous purity testing, fast global shipping, and responsive support to deliver reliable, research-grade peptides you can trust.

21.What is the shelf life of lyophilized peptides?

When stored correctly in a cool, dry environment, most lyophilized peptides remain stable for 12–24 months.

22.Can peptides be frozen?

Yes! Lyophilized peptides can be frozen for long-term storage. Reconstituted peptides, however, should not be frozen.

23.Are your peptides sterile?

Most research-grade peptides are not sterile unless explicitly stated. Always use proper sterile technique when handling these products.

24.How long does shipping usually take?

Transit times typically range from 3–10 business days, depending on your location. Please note that delays can occasionally occur due to carrier or customs issues outside our control.

25.Can I split or combine vial sizes?

Yes! Vials may be split or combined to match the total amount you ordered. For example, a 10mg purchase may be fulfilled as two 5mg vials, or two 5mg purchases may be combined into one 10mg vial. The total quantity will always match your order.

26.Do you provide handling instructions?

All peptides come with general handling guidance to help you maintain product integrity and safety during research use.

27.How are your peptides packaged?

All products are securely packaged with temperature control and desiccant packs to protect against moisture, temperature changes, and physical damage during shipping.

28.Can I order on weekends?

You can place orders anytime, but fulfillment and shipping only occur Monday–Friday during business hours.

29.Do you ship on holidays?

No. Orders are only shipped on business days, excluding public holidays.

30.What if my shipment is delayed due to customs?

While we ship worldwide, customs processing times vary by country and are outside our control. We recommend checking with your local customs office for more information on import regulations and potential delays.

31.Are peptides sensitive to light?

Some peptides are light-sensitive. Lyophilized powders should be kept in their original packaging, away from direct sunlight.

32.Can peptides be reconstituted multiple times?

Reconstitution should only be performed once to maintain stability. Multiple freeze-thaw cycles or reconstitutions can degrade peptide quality.

33.How do I know my peptide batch is authentic?

Each batch has a unique batch number for traceability. When available, you can verify authenticity through third-party lab testing or a COA.

34.What solvents are recommended for reconstitution?

We recommend using bacteriostatic water or sterile buffers. Please avoid non-sterile solvents, as they can compromise the product.

35.How do I report a damaged product?

If your order arrives damaged, please email us at info@sleekpeptides.com within 72 hours of delivery with photos of the product, packaging, and your order details. Claims are reviewed at our discretion.

36.Can I store reconstituted peptides long-term?

No. Reconstituted peptides are only stable for a short period and should be used promptly for best results.

37.Are your peptides allergen-free?

Our research-grade peptides do not contain common allergens unless otherwise stated on the product label.

38.Do you provide MSDS/SDS sheets?

Material Safety Data Sheets (MSDS/SDS) are available for many products. Email us at info@sleekpeptides.com to request a copy.

39.Can I pre-order out-of-stock products?

We don’t accept pre-orders. Items will be available for purchase again once they are restocked.

40.How should I handle peptide waste?

Dispose of peptides according to your local laboratory waste protocols. Never pour chemicals down household drains.

41.Are your products GMO-free?

All peptides are synthetic or recombinant (as specified) and do not contain genetically modified organisms unless explicitly stated.

42.Do you provide research guidance?

We provide general handling and storage information only. We do not offer any usage guidance for human or animal applications.

43.Can I combine multiple orders for shipping?

Orders placed separately cannot be combined once payment has been processed.

44.Are there quantity limits per order?

Some products may have quantity restrictions to ensure compliance with regulations and maintain stock availability for all customers.

45.Do you offer discounts for repeat customers?

Yes! We appreciate repeat customers. Contact us at info@sleekpeptides.com to discuss repeat purchase discounts or loyalty programs.

46.How is peptide quality maintained during transit?

All orders are packaged with temperature control and desiccant packs to help maintain product stability during shipping.

47.Can I return my order if I change my mind?

No. All sales are final, and we cannot accept returns for change of mind.

48.What should I do if my package arrives damaged?

Email us at info@sleekpeptides.com immediately with photos of the damaged product, packaging, and your order details. Please report issues within 72 hours of delivery.

49.How are batch numbers labeled?

Each vial is clearly labeled with a unique batch number for easy traceability and quality verification.

50.Can I get a replacement for a defective product?

Only verified manufacturing defects reported within 72 hours of delivery are eligible for consideration. Replacements are provided at Sleek Peptides’ discretion.