GLP Watchdog

CoreAge Rx vs Willow

Neither CoreAge Rx nor Willow has an FDA warning letter on record. On compounded tirzepatide injection, CoreAge Rx costs $3,240 less a year at standing rates: $129 a month against $399 a month at Willow. It is one of two products the two sell at comparable terms.

To see where both sit among the other sellers, read our best weight-loss injection providers board.

By Ruth Calder · Enforcement Editor
Editorially reviewed. Not medical advice · How we verify contentLast reviewed

The record

CoreAge Rx / Willow

Featured pick (affiliate partner)

CoreAge Rx logo

CoreAge Rx

9.0/10

Willow logo

Willow

7.3/10

FDA warning letters
None on record
None on record
Pharmacy
None named in our record
Lowest standing price
$79/moCompounded semaglutide injection
$299/moCompounded semaglutide injection
States
48 states
35 states
Checked
Prices captured Record checked November 2026
Prices captured Record checked September 2026
Visit CoreAge Rx
Visit Willow

CoreAge Rx is our featured pick on this page because it is an affiliate partner: we are paid if you sign up through our link. Willow pays us nothing. The scores are computed the same way for both and are shown as computed (CoreAge Rx 9.0, Willow 7.3). How we are paid

What the record shows

  1. 01

    Neither CoreAge Rx nor Willow has an FDA warning letter on record.

  2. 02

    Willow names five pharmacies. CoreAge Rx names no compounding pharmacy in our record.

  3. 03

    On compounded tirzepatide injection, CoreAge Rx costs $3,240 less a year at standing rates: $129 a month against $399 a month at Willow. It is one of two products the two sell at comparable terms.

  4. 04

    CoreAge Rx covers 13 states Willow does not.

Prices and terms, product by product

A price is set against the other side only for the same product, and only when both are standing monthly or 4-week rates. Those pairs are compared by yearly cost.

CoreAge Rx

Willow

Compounded semaglutide injection

$79/moLower

$948 a year

$299/mo

$3,588 a year

Compounded tirzepatide injection

$129/moLower

$1,548 a year

$399/mo

$4,788 a year

Price includes
Medication, clinician visits, shipping
Medication, clinician visits, shipping
Cancel any time
Yes, stated
Yes, stated
Minimum term
None
None
Refunds
Refund before provider approval, less a $50-$100 consult fee; final once sent to the pharmacy; none after 30 days
Full refund if you cancel before the prescription is sent to the pharmacy; none once the medication is compounded
Early-exit fee
None stated
Not stated

Read off each seller’s own pages. CoreAge Rx: November 5, 2026. Willow: July 10, 2026. Every plan and dose we hold is on the full review.

The case for each

The case for CoreAge Rx

9.0/10
Featured pick (affiliate partner)
  • $2,640 a year less on compounded semaglutide injection
  • $3,240 a year less on compounded tirzepatide injection
  • Lists 48 states against 35
  • Names no compounding pharmacy
Visit CoreAge Rx

The case for Willow

7.3/10
  • Names its compounding pharmacy
Visit Willow

Scores

CoreAge Rx 9.0 · Willow 7.3 out of 10. Six weighted parts.

Value25%

10.0A
vs
B
3.0

Effectiveness25%

10.0A
vs
B
10.0

User Experience15%

8.0A
vs
B
8.0

Trust & Safety15%

7.5A
vs
B
9.0

Accessibility10%

9.7A
vs
B
7.6

Support10%

7.0A
vs
B
7.0

The score is the same formula for every seller. Payment does not enter it. Method

CoreAge Rx vs Willow: questions

Neither CoreAge Rx nor Willow has an FDA warning letter on record. Letters are matched to a seller by company, domain and address, never by a similar name.
Willow names five pharmacies. CoreAge Rx names no compounding pharmacy in our record. A 503A pharmacy compounds for named patients on a prescription; a 503B outsourcing facility is registered with FDA and inspected under federal manufacturing rules.
CoreAge Rx, by $2,640 a year at standing rates. CoreAge Rx: $79 a month, about $948 a year. Willow: $299 a month, about $3,588 a year.
CoreAge Rx states you can cancel at any time; refunds: refund before provider approval, less a $50-$100 consult fee; final once sent to the pharmacy; none after 30 days. Willow states you can cancel at any time; refunds: full refund if you cancel before the prescription is sent to the pharmacy; none once the medication is compounded.
CoreAge Rx is our featured pick on this page because it is an affiliate partner: we are paid if you sign up through our link. Willow pays us nothing. The scores are computed the same way for both and are shown as computed (CoreAge Rx 9.0, Willow 7.3).

Other sellers we are paid by

Affiliate partners outside this pair. Each has its own record and review, scored the same way.

Sellers closest to these two

Matched on molecule, form and price. Every pair we list · The register