Three bottles for the price of two. Vitamin C for skin that struggles with L-ascorbic acid. Built on 15% magnesium ascorbyl phosphate (MAP) — a mild vitamin C that converts in the skin — at a comfortable pH 5.5, with niacinamide and hyaluronic acid. Stock up, keep the extras refrigerated, and never run out of fresh vitamin C.

Why fresh matters

Traditional L-ascorbic acid is powerful, but its low pH and strength can be too much for reactive skin. MAP (magnesium ascorbyl phosphate) is a gentler, more stable vitamin C that converts to active vitamin C in the skin — so you get the benefits at a comfortable pH 5.5, without the sting.

What it does

• Tingle-free vitamin C. MAP delivers vitamin C benefits at pH 5.5, so most reactive, easily-irritated skin can use it comfortably.
• Evens & calms tone. Niacinamide helps soften the look of discoloration and soothe redness for a more balanced, even-looking complexion.
• Hydrates & supports. Hyaluronic acid and pro-vitamin B5 keep skin cushioned, hydrated and comfortable.

Key ingredients

• Magnesium Ascorbyl Phosphate (MAP) — A gentle, stable vitamin C derivative that converts to active vitamin C in the skin — brightening without the low-pH sting.
• Niacinamide — Helps even tone, calm redness and reinforce the skin barrier.
• Hyaluronic Acid — Draws in moisture for hydrated, cushioned skin.
• Panthenol (Pro-Vitamin B5) — Soothes and conditions for lasting comfort.

Full ingredients: Purified Water, Magnesium Ascorbyl Phosphate, Niacinamide, DL-Panthenol, Sodium Hyaluronate, Hydrolyzed Oats, Nannochloropsis Oculata, Pullulan, Glycerin, Citric Acid.

How to use

1. Cleanse skin.
2. Apply 5–6 drops. Pat gently over the face and neck. Designed to be comfortable, with little to no tingle.
3. Let it absorb for a minute.
4. Follow with moisturizer, and sunscreen every morning.

Made for reactive skin. You can generally use C15 MAP daily. It layers well with other gentle actives. Store cool and dark and refrigerate unopened bottles to keep it fresh. If you want a stronger dose later and your skin can tolerate it, try our L-ascorbic C10 or C20.

Vitamin C works best with daily sunscreen

We don't sell sunscreen, but it's the one step that protects everything this serum works toward. Without daily SPF, UV light breaks vitamin C down, drives new dark spots and speeds collagen loss — so your serum is left fighting an uphill battle. With it, you lock in and protect your progress.

What to look for in a sunscreen:

• Broad-spectrum — protects against both UVA (aging) and UVB (burning) rays.
• SPF 30 or higher — blocks about 97% of UVB; don't drop below 30.
• Every morning — apply as the last step after your serum, and reapply every two hours in the sun.
• A texture you'll actually wear — mineral (zinc oxide, titanium dioxide) or a modern chemical filter; pick one that feels good so you use it daily.

FAQ

Will all three bottles stay fresh?
Yes. Each bottle is blended fresh and hand-dated, and unopened bottles keep their potency for months in the refrigerator. Open one at a time and use it within about three months of opening.

What is MAP and how is it different from L-ascorbic acid?
MAP (magnesium ascorbyl phosphate) is a gentle, stable form of vitamin C that converts to active vitamin C in your skin. It works at a comfortable pH 5.5 instead of the low pH of L-ascorbic acid, so it delivers vitamin C benefits without the tingle — ideal for sensitive skin.

Who should choose C15 MAP over the L-ascorbic serums?
Choose C15 MAP if L-ascorbic acid serums sting, if you have sensitive or easily-irritated skin, or if you simply prefer a tingle-free vitamin C. If your skin tolerates stronger actives, our C10 or C20 offer a higher-strength L-ascorbic dose.

Will it still brighten if it's so gentle?
Yes — MAP is a well-studied vitamin C derivative that supports brightening and antioxidant defense. It simply works more gradually and gently than high-strength L-ascorbic acid.

How should I store it?
Keep the cap closed and store in a cool, dark place; refrigerate unopened bottles. MAP is more stable than L-ascorbic acid, but fresh is still best — use opened bottles within a few months.

What if it doesn't work for me?
You're covered by our 30-day money-back guarantee. Contact us within 30 days of delivery and we'll refund you in full — no need to return the bottle.

Made fresh · Hand-dated · Shipped from Colorado · 30-day money-back guarantee · Free U.S. shipping over $50.