Inside this formula
- Brand
- Alloy
- Product
- M4 Face Serum Rx
- Formulation / access
- Compounded topical
- Published ingredients
- Estriol and peptides; hyaluronic acid is named in the skincare catalog
- Published price
- $159 for a three-month supply
- Important detail
- The serum is a separate preparation from M4 Face Cream.
Product facts: brand’s official information ↗. Prices are the published offer, not a personal checkout quote.
The formulation question
What the formula can tell you
Estriol is a form of estrogen. Concentration, vehicle and application area matter, and an ingredient-level observation cannot establish systemic exposure or individual safety for a different formula.
Context: AAD pregnancy skincare guidance ↗ · FDA on compounded medicines ↗.
Before starting or switching
Ask the prescriber to review allergies, pregnancy or breastfeeding, other medicines and the exact treatment area. Follow the dispensed label and seek advice for significant irritation.
- What exact ingredients, strengths and dosage form will I receive?
- What is the full first charge, quantity, refill schedule and cancellation policy?
- When should treatment be reassessed, and how do I contact the clinician?
These are questions for a licensed clinician, not instructions to start, stop or change a prescription. Read the product’s complete safety information.
CoreAge Rx is placed first because it is this publication’s promoted recommendation. No head-to-head clinical testing supports a claim that it is better or safer than Alloy M4 Face Serum Rx.
Sources & review limits
- myalloy.com — M4 Face Serum Rx product information ↗
- fda.gov — FDA compounded-drug risks ↗
- aad.org — AAD clinical guidance ↗
We reviewed the public information linked above on October 7, 2026. We did not purchase or use this product, complete its medical consultation, test shipping or verify patient results. Formulas, availability and prices can change.
How we research and compare products ↗