Peptides
Peptides Therapy in Westhampton Beach & East Patchogue, NY
Peptides therapy at L.I. Skin Clinic & Cosmetics uses prescription peptides, short chains of amino acids that act as signaling molecules in the body, to support specific goals such as metabolic health, hormone signaling, recovery, sexual function, and skin quality. Your body naturally produces many peptides, including insulin and growth hormone–releasing hormone. Therapeutic peptides are designed to mimic or influence these signals. At our Westhampton Beach and East Patchogue offices, every peptides plan begins with a medical evaluation and is prescribed and monitored by licensed providers, with clear discussion of what the research does and does not yet show.
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What Peptides Are and How They Work
Signaling Molecules
Peptides bind to specific receptors on cells and trigger targeted responses, such as releasing a hormone, reducing appetite, or stimulating tissue repair. Because each peptide has a narrow job, peptides therapy can be matched to a specific goal.
Peptides Versus Proteins
Peptides are smaller than proteins, typically fewer than 50 amino acids long. Their size allows them to act quickly and precisely, but most are broken down in the digestive tract, so many are given as small injections under the skin.
Regulation and Sourcing
The regulatory status of peptides varies widely. Some are FDA-approved medications, while others have limited human research and restricted availability through compounding pharmacies. Your provider will only prescribe peptides that can be legally and safely sourced from licensed pharmacies.
Peptides Therapy Options
Metabolic and Weight Management Peptides
GLP-1 receptor agonists such as semaglutide and tirzepatide are among the most studied peptides in medicine. They reduce appetite and improve blood sugar control and are offered through our Metabolic Health / GLP-1 program.
Growth Hormone–Releasing Peptides
Sermorelin and similar peptides stimulate the pituitary gland to release your own growth hormone rather than replacing it directly. Patients often seek these peptides for sleep quality, recovery, and body composition, although evidence in healthy adults is limited.
Sexual Health Peptides
Bremelanotide (PT-141) is an FDA-approved peptide for premenopausal women with low sexual desire. It works on brain pathways linked to arousal and is often part of our Sexual Health & Vitality care.
Skin and Aesthetic Peptides
Topical peptides such as copper peptides are used in skincare to support collagen and skin texture. These can complement aesthetic treatments offered at L.I. Skin Clinic & Cosmetics.
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Who Is a Candidate for Peptides Therapy
Good Candidates
Adults with clear, specific goals such as weight management, improved sexual desire, or support for hormone signaling may be candidates for peptides therapy after medical screening.
Who Should Avoid Peptides
Peptides are generally not used during pregnancy or breastfeeding. People with active cancer or a history of certain cancers should avoid growth hormone–related peptides. GLP-1 peptides are not appropriate for those with a personal or family history of medullary thyroid carcinoma or MEN2. Uncontrolled high blood pressure, heart disease, and diabetes require additional review.
The Peptides Therapy Process
Consultation and Goal Setting
Your provider reviews your health history, medications, and goals and explains which peptides have meaningful evidence for your situation.
Lab Work
Baseline labs may include a metabolic panel, A1C, lipids, thyroid function, IGF-1, and hormone levels depending on the peptides being considered.
Prescription and Instruction
Most injectable peptides use a very small needle under the skin. Staff will teach you proper dosing, storage, and injection technique.
Monitoring
Follow-up visits and repeat labs track results and side effects so your peptides plan can be adjusted, paused, or discontinued as needed.
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Peptides Frequently Asked Questions
What are peptides?
Peptides are short chains of amino acids that act as signaling molecules in the body. Therapeutic peptides mimic or influence natural signals to support goals such as appetite control, hormone release, sexual function, or skin health.
What is peptides therapy used for?
Peptides therapy is used for weight management, blood sugar control, growth hormone signaling, sexual desire, recovery, and skin quality. The specific peptide depends on your goals and medical screening.
Are peptides safe?
FDA-approved peptides such as semaglutide, tirzepatide, and bremelanotide have established safety data. Other peptides have more limited research, so safety depends on the specific peptide, the source, and medical supervision.
Are peptides FDA-approved?
Some are and some are not. Several peptides are FDA-approved prescription medications, while others are available only through compounding pharmacies under specific rules, and some have been restricted by the FDA due to safety concerns.
How are peptides taken?
Most therapeutic peptides are given as small subcutaneous injections because they break down in the digestive tract. Some are available as nasal sprays, oral tablets, or topical creams.
How long does it take for peptides to work?
Timing depends on the peptide. GLP-1 peptides reduce appetite within one to two weeks, PT-141 works within hours of a dose, and growth hormone–releasing peptides may take several months to show effects.
What are the side effects of peptides therapy?
Common side effects include injection site redness, nausea, headache, flushing, and changes in appetite. Specific side effects depend on the peptide prescribed.
What is sermorelin?
Sermorelin is a peptide that stimulates the pituitary gland to release growth hormone naturally. It is sometimes prescribed for adults with low growth hormone signaling.
Can I buy peptides online?
Peptides sold online as "research chemicals" are not regulated for human use and may be contaminated or mislabeled. Peptides should only be obtained by prescription from a licensed pharmacy.
Do peptides help build muscle?
Some peptides affect growth hormone and recovery, but strong evidence for muscle gain in healthy adults is limited. Resistance training and adequate protein remain the foundation for building muscle.
How long do I need to stay on peptides?
Duration varies by peptide and goal. Some are used in cycles of several months, while others, such as GLP-1 peptides, are often continued longer with ongoing monitoring.