40s
Best peptides for women over 40
For many women, perimenopause starts in the 40s, often years before periods stop. Hormones fluctuate rather than fall steadily, and that shows up as weight moving to the middle, lighter sleep, lower energy and a dip in desire. This protocol targets the three changes women in their 40s ask about most.
Quick answer: The best peptides for women over 40 are Tirzepatide Microdose for weight, PT-141 for desire and NAD+ Injectable for energy. A licensed provider reviews your history before prescribing any of them.
See the 40s protocol
Medically reviewed by Dr. Jonathan Snipes, MD and Kim Callender, NP, FNP-BC. Last reviewed September 29, 2026.What changes
What tends to shift in your 40s
Weight shifts to the middle
Many women gain around the waist in their 40s even without changing how they eat, as hormones fluctuate and muscle mass slowly drops.
Desire can dip
Low sexual desire is one of the most common and least discussed changes of this decade.
Energy and sleep get less reliable
Fluctuating hormones can make sleep lighter and the afternoon slump heavier.
The 40s protocol
What's on the list, and why
Why it's on the list: Tirzepatide acts on two appetite hormones (GLP-1 and GIP). In the SURMOUNT-1 trial of the brand-name drug, people lost 15 to 21 percent of their body weight over 72 weeks, depending on dose. A microdose start keeps side effects low while you find your dose.
Good to know: Not for pregnancy or breastfeeding. GLP-1 medicines carry a thyroid warning, and the intake screens for it. If you take birth control pills, tirzepatide can make them less reliable after you start and after each dose increase, so ask the provider about a backup method.
Full details and dosing
Why it's on the list: PT-141 (bremelanotide) works on desire in the brain, not on blood flow. Brand-name bremelanotide (Vyleesi) is FDA-approved for premenopausal women with low sexual desire, which fits many women in their 40s. The compounded version we prescribe is the same molecule but is not FDA-approved.
Good to know: Not for use in pregnancy. Nausea and flushing are the most common side effects.
Full details and dosing
Why it's on the list: NAD+ supports how your cells make energy, and levels keep falling through your 40s. It is the energy pick most women pair with a weight or desire goal.
Good to know: Human studies are early. Injections can cause brief flushing or nausea.
Full details and dosing
One visit, three peptides
Add the 40s protocol
All three fit in a single $39 provider visit. The provider reviews each one against your history and may adjust or remove any of them.
- WeightTirzepatide Microdose$45/12mg
- DesirePT-141$75/10mg
- EnergyNAD+ Injectable$100/1000mg
- Medications
- $220.00
- Provider visit, one time
- $39.00
- Pharmacy shipping, billed by the pharmacy
- $15.00
Medication prices are for the first vial or jar of each. No subscription.
Other decades
30sBest peptides for women in their 30s
50sBest peptides for women over 50
60+Best peptides for women over 60
Not sure your decade tells the whole story? Start from your goal instead in the peptides for women guide.
Frequently asked questions
- What are the best peptides for women over 40?
- The three most requested are a microdose GLP-1 such as tirzepatide for midlife weight, PT-141 for low desire and NAD+ for energy. A provider reviews your history, medications and pregnancy status before prescribing.
- Can peptides help with perimenopause?
- Peptides can help with some changes that often come with perimenopause, like weight around the middle, low desire and low energy. They do not replace estrogen or progesterone, and they don't treat hot flashes or night sweats. For those, ask your doctor about hormone therapy.
- Can I take tirzepatide if I'm on birth control pills?
- Tirzepatide can make birth control pills less reliable after you start it and after each dose increase. Tell the provider which contraception you use so they can advise a backup method.
- Can I add or swap peptides in the 40s protocol?
- Yes. Remove anything from your cart before checkout, and the provider may change or decline any item. Each $39 visit covers up to three peptides.