A peptide is a short chain of amino acids — the same building blocks your body uses to make protein. A protein is a long chain; a peptide is a short one.
Short enough to act as a precise signal, and that is the whole idea behind them. A peptide is not fuel and not something your body burns. It attaches somewhere and tells a cell to do something: build collagen, calm inflammation, take up more sugar, release a hormone. Think of it as an instruction rather than an ingredient.
Several of the peptides Belle offers are ones your body already makes on its own, and makes less of as you get older. That is the premise of the whole category: giving back a signal your body has been losing.
Which peptides does Belle offer?
Sermorelin — sleep, recovery and body composition
BPC-157 — recovery, healing, and gut inflammation
GHK-Cu injections — skin, hair, nails and inflammation
MOTS-c — metabolic health, energy and muscle
Tesamorelin — sleep, recovery, muscle and deep belly fat
Glutathione — antioxidant support, detox and skin brightening
Each one has its own article explaining what it does and who it is for.
Why are they injected instead of taken as a pill?
Stomach acid and digestive enzymes break peptides apart before they can be absorbed, so a peptide swallowed as a pill would not survive the trip. That is chemistry, not preference. Belle's peptides are given as a small injection just under the skin.
Are they hormones or steroids?
No. A peptide is not a steroid and it is not hormone replacement. Tesamorelin and sermorelin are a good example: neither one gives you growth hormone. They signal your own body to release more of its own.
Do I have to mix anything?
No. Your peptide arrives from the pharmacy already mixed and ready to use. You never reconstitute anything, never handle mixing water, and never do any measuring with a vial.
How do I store it?
Keep your vial in the refrigerator, and do not freeze it. Freezing is not a way to make it last longer.
Your vial is good for 90 days from the date the pharmacy mixed it — not 90 days from the day it arrived on your doorstep. The clock starts at the pharmacy, so the date to check is the one on the vial, not the box. If your vial is past that date, that is a reorder rather than a "probably still fine" — message us and we will get you a fresh one.
If it has been left out of the fridge, it is fine for up to 72 hours at room temperature. Keep it out of heat above 80°F, and get it back in the refrigerator as soon as you notice.
Why do I take a break between cycles?
Think of the receptor a peptide acts on as a lock the signal fits into. If it is stimulated without a break, it stops responding as well. Taking time off lets it reset, so your next stretch works as well as your first.
BPC-157, GHK-Cu, MOTS-c and tesamorelin run in cycles of 10 weeks on, then 2 weeks off. That is why you stop at the end of a cycle even if you are feeling great in week six. Some of them also have days off built into the week, which is the same idea on a smaller scale. Sermorelin is the exception — it is offered as a quarterly plan rather than a fixed cycle, and how long you stay on it is something you decide with your provider.
How long before I notice anything?
It depends heavily on the peptide, and the honest answer for some of them is longer than people expect. A few can produce a change in energy or sleep within the first few weeks. Others do very little visible work in the first month and only start showing results between weeks 8 and 12, near the end of a cycle. Your article for your specific peptide gives you the real timeline.
The most common reason people stop too early is that nobody told them month one is the setup rather than the payoff.
Are they FDA approved?
These are compounded medications, made for you individually by a licensed 503A compounding pharmacy in the United States. They are not FDA approved for the uses Belle prescribes them for, and compounded medications are not reviewed by the FDA for safety or effectiveness before they are sold. Results are not guaranteed, they vary from person to person, and the full range of possible side effects is not yet known. You agree to all of this in writing when you complete your assessment.
Belle does not use gray-market or "research only" material.
When to message us
Reach out any time, and especially for a new symptom that is not on the expected list for your peptide, anything that feels wrong enough that you are unsure about your next dose, a new diagnosis or medication, or any question about combining peptides.
For signs of an allergic reaction — hives, swelling of the lips or tongue, or trouble breathing — seek emergency care first, then let us know.