Can't decide between our 20% serums? Get all three — Original, Ferulic and Brightening — one bottle each, so you can try them side by side and find your favorite. Every bottle is blended in small batches and hand-dated. Why fresh matters Every serum in this pack is built on the same small-batch, hand-dated 20% L-ascorbic acid. What changes is the supporting cast — a simple base, added ferulic antioxidants, or niacinamide for dark spots — so you can feel the difference and settle on the one your skin loves. What it does C20 Original. 20% L-ascorbic acid in a simple four-ingredient base — no added actives. C20 Ferulic. Adds ferulic acid for extra antioxidant defense, plus hyaluronic acid for hydration and cushion. C20 Brightening. Adds niacinamide to target dark spots, discoloration and uneven tone. Key ingredients C20 Original — Purified Water, 20% L-Ascorbic Acid, Magnesium Sulfate, Glycerin. (pH 2.5) C20 Ferulic — Adds Ferulic Acid, Sodium Hyaluronate, Panthenol & Sodium PCA for antioxidant and hydration support. (pH 2.5–3) C20 Brightening — Adds Niacinamide (Vitamin B3) and Citric Acid to target dark spots and even tone. (pH 3.0) Full ingredients: Three separate 1 fl oz bottles — C20 Original, C20 Ferulic and C20 Brightening. Each is fragrance-free and oil-free. Full ingredient lists are on each product's page. How to use Cleanse skin. Apply 5–6 drops. Use one serum at a time morning or night, or alternate. A mild tingle is normal. Let it absorb for a minute. Follow with moisturizer, and sunscreen every morning. How to compare: Try one bottle for a couple of weeks before switching, or use different formulas AM and PM. Keep caps tight, store cool and dark, and refrigerate the bottles you haven't opened yet. Replace any serum that turns deep amber. 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 What's included in the Super Pack?One full-size 1 fl oz bottle each of C20 Original (20% vitamin C in a simple base), C20 Ferulic (with ferulic and hyaluronic acid) and C20 Brightening (with niacinamide) — three different 20% serums to try side by side. Which one should I start with?If pigmentation is your focus, start with Brightening. Want extra antioxidant and hydration support? Start with Ferulic. Prefer the simplest option? Start with Original. There's no wrong order — they all share the same 20% vitamin C base. Do I use all three at once?No need. Use one at a time morning or night, or alternate them. Many people find a favorite and keep the others for specific concerns like dark spots. How should I store it, and how long does it last?Keep the cap closed and store in a cool, dark spot; refrigerate unopened bottles to extend freshness. Once opened, use it within about three months. A deep amber color is your signal it has oxidized and it's time for a fresh bottle. 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. Small-batch · Hand-dated · Shipped from Colorado · 30-day money-back guarantee · Free U.S. shipping over $50.
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