Question 1

What are peptides?

Accepted Answer

Peptides are short chains of amino acids (typically 2-50) that act as signaling molecules in the body. They are smaller than proteins and can influence specific biological processes like growth, recovery, immune function, and more. Your body naturally produces thousands of peptides.

Question 2

Are peptides safe?

Accepted Answer

Safety varies significantly between peptides. Some, like Tesamorelin and PT-141, are FDA-approved with well-characterized safety profiles. Others have limited human safety data. The safety of any peptide depends on the specific compound, the quality of the source, proper dosing, and appropriate medical supervision. Always work with a qualified clinician.

Question 3

Are peptides legal?

Accepted Answer

The legal status of peptides varies by compound and jurisdiction. FDA-approved peptides are legal with a prescription. Many other peptides are available through compounding pharmacies with a clinician's prescription. Some are sold as research chemicals. The legality depends on the specific compound, how it is obtained, and local regulations.

Question 4

Do I need a prescription for peptides?

Accepted Answer

For therapeutic use, most peptides should be obtained through a licensed clinician and compounding pharmacy, which requires a prescription. Some topical peptides (like GHK-Cu in skincare) are available over the counter. We strongly recommend working with a qualified clinician for any injectable peptide.

Question 5

How are peptides administered?

Accepted Answer

The most common route is subcutaneous injection (a small needle into the fatty tissue under the skin). Some peptides are available as nasal sprays (like Semax and Selank), oral forms (like MK-677), or topical applications (like GHK-Cu in skincare). The route depends on the specific peptide and its intended use.

Question 6

What is the difference between FDA-approved peptides and compounded peptides?

Accepted Answer

FDA-approved peptides have undergone rigorous clinical trials and regulatory review for specific indications. Compounded peptides are prepared by licensed pharmacies based on clinician prescriptions but have not undergone the same level of regulatory scrutiny. Both can be legitimate, but the evidence base and quality assurance differ significantly.

Question 7

Can peptides interact with my medications?

Accepted Answer

Yes, some peptides can interact with medications. For example, growth hormone peptides can affect blood sugar and may interact with diabetes medications. Selank may interact with GABAergic medications. Always disclose all medications and supplements to your clinician before starting any peptide therapy.

Question 8

How long do peptides take to work?

Accepted Answer

This varies widely by peptide and intended effect. Some effects (like improved sleep from GH peptides) may be noticed within days to weeks. Others (like body composition changes) may take weeks to months. Skin peptides applied topically typically show gradual results over 4-12 weeks. Your clinician can set appropriate expectations.

Question 9

What does 'evidence level' mean on this site?

Accepted Answer

Our evidence levels reflect the overall strength of scientific support for a peptide: Strong (multiple human clinical trials), Moderate (some human data with preclinical support), Emerging (early human data or strong animal evidence), Preliminary (mostly preclinical), and Limited (very early research). These help you understand how confident we can be in the available information.

Question 10

Is this site providing medical advice?

Accepted Answer

No. This resource is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions about a medical condition or treatment. Never disregard professional medical advice because of something you read here.

Question 11

What is Peptide List?

Accepted Answer

Peptide List is an educational resource designed to help people understand peptides through a trust-first, evidence-graded lens. It combines clinician-guided insights with evidence-based education.

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