Epionce Intense Defense Serum | Vitamin C
Epionce Intense Defense Serum | Vitamin C
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The vitamin C serum that doesn't sting, doesn't oxidize, and doesn't quit.
Epionce Intense Defense Serum is the antioxidant alternative to traditional L-ascorbic acid vitamin C serums. Tetrahexyldecyl ascorbate — an oil-soluble, stable form of vitamin C — penetrates 3× deeper than standard L-ascorbic acid, layered with Kakadu plum (the highest natural source of vitamin C), samphire (a retinoid alternative), and flax seed for daily anti-aging without irritation.
Why people reach for it
Tetrahexyldecyl ascorbate (THD ascorbate) is oil-soluble, more stable than L-ascorbic acid, and penetrates 3× deeper at the same concentration.
Most vitamin C serums sting, oxidize within weeks, and turn orange. This formulation does none of those things.
Samphire (sea fennel) provides retinoid-like smoothing benefits without retinol's sun sensitivity or peeling.
Botanical sources of vitamins A, B, C, D, and E — defends against UV, blue light, and pollution-driven aging.
Who it's for
All skin types — designed to address:
Why it works
Oil-soluble vitamin C derivative that penetrates 3× deeper than L-ascorbic acid — without the sting, instability, or oxidation.
The highest natural source of vitamin C on Earth — rich in quercetin and a wide spectrum of antioxidants.
Provides retinoid-like activity without retinoid side effects — rich in polyphenols and tocopherols for antioxidant defense.
Omega-3 fatty acids that calm irritation while contributing to longer-term anti-aging benefit.
How to use it
- Cleanse with a gentle cleanser
- Apply 3–5 drops to clean, dry skin
- Massage into face, neck, and chest
- Layer moisturizer and SPF on top
- Cleanse thoroughly
- Apply Intense Defense before retinol or treatment serums
- Layer your night moisturizer on top
- Skip vitamin C the night before in-office treatments
Common questions
Is this the best vitamin C serum for face?
If your bar for "best" is potency + tolerability + shelf life, yes. Most L-ascorbic acid serums sting, oxidize within 2–3 months, and need to be discarded. Intense Defense uses a more stable, oil-soluble vitamin C derivative that penetrates deeper without the sting — and the bottle stays effective for the full year.
How is THD ascorbate different from L-ascorbic acid?
L-ascorbic acid is the original vitamin C — potent but unstable, water-soluble, and irritating at higher concentrations. THD ascorbate is oil-soluble, more stable, less irritating, and penetrates 3× deeper into the skin at the same concentration.
Can I use it with retinol?
Yes — vitamin C in the morning, retinol at night is the classic pairing. Or layer Intense Defense first at night, then retinol on top, if your skin tolerates it.
Will it stain or pill under SPF and makeup?
No. The serum is engineered to layer cleanly under sunscreen and foundation.
How long until I see brightening results?
Subtle brightness within 2–3 weeks. Real changes in tone, texture, and dark spots typically build over 8–12 weeks of consistent daily use.
Do you ship, or can I pick up locally?
Both. Free shipping over $100 within the US, or pick up at our San Antonio location (20327 Interstate 10 Ste 140) — usually ready within 24 hours of ordering.
"Intense Defense is the vitamin C we hand to anyone who's tried L-ascorbic acid serums and bounced off them. No sting, no orange-bottle oxidation, no "this used to work and now it doesn't." Just steady brightening and antioxidant defense, every day."
- ✓Free shipping over $150
- ✓Authorized retailer
- ✓Aesthetician approved
- ✓San Antonio pickup available