Every bottle is blended fresh after you order, then ships within 1–2 business days. You'll get tracking as soon as it's on its way — and your serum arrives full-strength instead of shelf-aged.

Keep unopened bottles in the refrigerator — they'll stay potent for months, and each one is hand-dated so you can check. Once opened, store it cool and dark, and replace it if the serum ever turns dark amber (a sign the vitamin C has oxidized).

Sensitive skin or new to vitamin C: start with C10 (10%). Experienced users: C20 (20%) — Original for simplicity, Ferulic for extra benefits, Brightening to target dark spots. If L-ascorbic acid irritates your skin no matter what, C15 MAP is the gentle alternative at pH 5.5.

Yes — that's exactly where it belongs. Apply a few drops to clean skin in the morning, let it dry, then layer sunscreen or makeup on top. A mild, warm tingle on application is normal, especially at first.

If you're not happy, contact us within 30 days of delivery and we'll refund you in full — you don't need to return the bottle. U.S. shipping is free on orders over $50. We currently ship within the United States only.