What stability testing is recommended for vitamin C serum sold in the U.S. market?

Quick Answer (for busy buyers)

Here’s the buyer-first summary. If your brand name is on the label, you usually act as the responsible person and must ensure the listing is submitted and kept current.

• For vitamin C serum in the U.S. market, we typically set up the stability plan during Step 2 (scheme confirmation) and confirm it again after Step 5 (sample approval).
• Because vitamin C is oxidation-sensitive, we strongly suggest testing in the final, production-intent packaging (inner bottle + outer box) and aligning the test outputs with your intended shelf-life/claims.
• We can support arranging send-out testing and preparing the related documentation; please share your target shelf-life, storage expectations, and whether you sell FBA or DTC.
• Operationally, our one-stop delivery timeline is usually 45-60 days from plate-setting/signing through packaging, testing, mass production, warehousing, and shipment.
• Packaging ordering often takes 10-30 working days; typical references are unit box 15 days, gift/set box 20 days, glass bottle 15 days, acrylic bottle 30 days, and tube 15 days.
• For production readiness, we also factor in packaging testing (3 days), raw material production (5-7 days), raw material testing (5 days), and finished goods production (7 days).
• MOQ depends on formula and packaging configuration; tell us your target quantity and bottle type and we’ll propose the most efficient plan.