What goes into a vitamin C and ferulic acid eye serum formula
A stable vitamin C and ferulic acid eye serum is one of the harder antioxidant formulas to get right because L-ascorbic acid oxidizes quickly once exposed to air, light, and water. Most cosmetic chemists work at a pH between 2.5 and 3.5 to keep the vitamin C active, pair it with 0.5-1% ferulic acid as a co-antioxidant and stabilizer, and often add vitamin E (tocopherol) to round out the classic "CEF" antioxidant trio. Because the formula goes near the eye, chemists also dial back fragrance, limit certain surfactants, and may run an ophthalmologist-reviewed or dermatologist-tested claim if the brief calls for it.
Packaging matters as much as the formula: opaque or amber airless pump bottles and foil-sealed droppers are standard to block light and air that degrade the actives. A manufacturer should be able to show you accelerated stability data (typically 3 months at elevated temperature, standing in for about a year of shelf life) before you commit to a full production run.
MOQ, cost, and timeline for private label eye serum
| Stage | Typical Range | What Moves It |
|---|---|---|
| MOQ | 500-5,000 units | Stock base vs custom actives %, packaging exclusivity |
| Unit cost | $3-$9 | Vitamin C concentration, airless packaging, inserts |
| Formula development | 2-5 weeks | Stock base vs fully custom antioxidant blend |
| Stability/compatibility testing | 3-8 weeks | Eye-area claims, accelerated vs real-time data |
| Bulk production + fill | 3-6 weeks | Order size, co-packer queue, bottle lead time |
| Total timeline | 8-14 weeks | Custom actives and testing add weeks on both ends |
How to vet a manufacturer before you commit
- Ask for proof of certifications (GMP, organic, cruelty-free) rather than taking a claim at face value
- Request facility photos and confirm they carry liability insurance
- Get a sample batch before you sign off on a full production run
- Ask directly what pH range and antioxidant stabilization method they use for vitamin C
- Confirm who owns the formula if you ever want to switch manufacturers later
AJ Cosmo Labs is a marketplace where manufacturers apply with their business address, manufacturing capabilities, MOQ, certifications with proof, facility photos, and a liability insurance certificate — all reviewed by admins before the listing goes live. That gives you a documented starting point instead of a cold outreach email with no verification trail.
Why founders use the AJ Cosmo Labs app
Instead of cold-emailing a list of contract manufacturers and waiting to hear back, you can post one brief inside the app and let approved formulators and manufacturers come to you.
- Post a brief describing your eye serum concept, target actives %, and packaging goals
- Message pre-vetted chemists and manufacturers directly inside the app
- Browse manufacturers filtered by MOQ, location, and certifications
- Hold payments in escrow and release funds by milestone as development progresses
- Track sample requests and formula revisions in one place
- Get push notifications when a chemist or manufacturer responds to your brief
Hire requests stay open for proposals for 7 days, which gives several approved providers time to review your brief and respond, rather than you chasing one supplier at a time.
Common mistakes first-time brands make
The biggest mistake is choosing a stock vitamin C base purely on price without asking about the pH and stabilization method — a poorly stabilized formula can turn orange or lose potency within weeks on a retail shelf. The second is skipping stability testing on eye-area products, which carries more scrutiny than a face serum because of sensitivity concerns. The third is locking into a packaging MOQ (sometimes higher than the formula MOQ) without checking it against your actual sales forecast.
Ready to find your manufacturer
Download the AJ Cosmo Labs iPhone app from the App Store, create your brand profile, and post a brief for your vitamin C and ferulic acid eye serum. Approved chemists and manufacturers can respond with proposals, you can request samples, and you keep every conversation and payment milestone inside one app instead of scattered across email threads. Install AJ Cosmo Labs today and move your eye serum from concept toward a production-ready batch.