Vitamin C and retinol are two of the most researched ingredients in skincare — and they work even better when used as a team. If you've been wondering whether you can use them together, the short answer is yes. The longer answer involves knowing when to apply each one, how to layer them correctly, and which formulas are best suited for sensitive skin.
Here's everything you need to know about using vitamin C and retinol together — without the guesswork.
What Each Ingredient Actually Does
Vitamin C
Vitamin C is a potent antioxidant that helps protect skin from the visible effects of environmental stress. Used consistently in the morning, it helps skin look more radiant and even-toned over time, and helps visibly brighten the appearance of dull or uneven skin. Not all vitamin C is the same, though: traditional L-ascorbic acid is notoriously unstable and can feel irritating on reactive or sensitive skin.
The Glow Getter Radiant C Serum uses tetrahexyldecyl (THD) ascorbate — an oil-soluble, encapsulated form of vitamin C that's more stable and gentler than L-ascorbic acid. Formulated for sensitive skin, it delivers a visible radiance boost without the sting or oxidation issues that come with less stable forms. It's also free of synthetic fragrance.
Retinol
Retinol is a vitamin A derivative that encourages skin cell turnover, helping skin look smoother and more refined over time. With consistent use, retinol helps visibly soften the appearance of fine lines, and helps skin look fresher and more even in texture and tone.
The Radical Repair® Retinol Reinvented Serum uses a stabilized, time-released retinol system specifically designed for sensitive skin — delivering the long-term visible benefits of retinol with a significantly reduced risk of dryness or visible irritation. It's a meaningful step up from conventional retinol formulas that tend to overwhelm reactive skin types.
Can You Use Vitamin C and Retinol Together?
Yes — and most skin types benefit from using both. The key is not applying them at the exact same time. Because vitamin C works best in the morning (paired with SPF, where it can help defend against visible environmental stress) and retinol works best at night (during your skin's natural renewal window), they slot naturally into an AM/PM routine without any conflict.
The old advice to never combine vitamin C and retinol was largely based on outdated concerns about pH interactions — but modern, well-formulated products sidestep these issues entirely. The Glow Getter Radiant C Serum and Radical Repair® Retinol Reinvented Serum are designed to work alongside each other as part of a complete sensitive-skin routine.
The Recommended Routine
Morning
- Cleanser
- Glow Getter Radiant C Serum — apply to clean, dry skin and allow to absorb before the next step
- Moisturizer
- SPF (non-negotiable — especially when using vitamin C and retinol)
Evening
- Cleanser
- Radical Repair® Retinol Reinvented Serum — apply after cleansing, before moisturizer
- Dream Cream Nighttime Moisturizer — seals in the serum and supports a deeply hydrated, rested look by morning
This routine works well for most skin types, including sensitive skin. If you're new to retinol, start by using the Radical Repair® Retinol Reinvented Serum two to three nights per week and build from there as your skin adjusts.
Tips for Using Both Without Irritation
Start retinol two to three nights per week
If retinol is new to your routine, every other night is a good starting point. The time-released formula in Radical Repair® Retinol Reinvented Serum makes it easier to introduce than conventional retinol — but giving skin time to acclimate is still smart, particularly for sensitive or reactive skin types.
Apply vitamin C to dry skin before anything else
For best results with the Glow Getter Radiant C Serum, apply it right after cleansing before layering any other products. THD ascorbate is oil-soluble, which means it absorbs well and doesn't require a strictly water-free base — and it's significantly less reactive than L-ascorbic acid, making it well-suited for daily morning use.
Always use SPF during the day
Vitamin C and retinol both support skin's appearance over time, but neither replaces sun protection. SPF is especially important when retinol is part of your routine. Apply your Glow Getter Radiant C Serum first thing in the morning — it helps skin look more radiant and supports its defense against visible environmental stressors — then layer SPF over your moisturizer before heading out.
Watch for visible signs of sensitivity
Some light flaking or dryness during the first few weeks of retinol use is common and typically temporary as skin adjusts. If you notice persistent visible redness or irritation, reduce how often you're using retinol and give skin more time before increasing frequency. Pairing Radical Repair® Retinol Reinvented Serum with a calming, hydrating moisturizer like Dream Cream Nighttime Moisturizer can help skin feel comfortable throughout the adjustment period.
Frequently Asked Questions
Can I use vitamin C and retinol on the same night?
It's possible, but generally not necessary. Since vitamin C is most effective in the morning and retinol is most effective at night, using them in separate routines is simpler and reduces the chance of visible skin sensitivity. For most people, the AM/PM split delivers better results with less guesswork.
Which do I apply first — vitamin C or retinol?
If you're using them at different times (recommended), the order is irrelevant — vitamin C in the morning, retinol at night. If you're applying both at night, start with the lighter-consistency product first, allow it to absorb, and then layer the next.
Can sensitive skin use both vitamin C and retinol?
Yes — with the right formulas. Traditional L-ascorbic acid and high-percentage retinol can be too aggressive for reactive skin. The Glow Getter Radiant C Serum uses oil-soluble THD ascorbate (gentler and more stable than L-ascorbic acid), and the Radical Repair® Retinol Reinvented Serum uses a time-released delivery system formulated specifically for sensitive skin. Both are free of synthetic fragrance.
How long before I notice a visible difference?
Most people notice a visible improvement in skin radiance and texture within 4–8 weeks of consistent use. Retinol works best with sustained use over time — skin tends to look smoother and more even with continued use across months, not just weeks.
Is it better to use vitamin C in the morning or at night?
Morning. As an antioxidant, vitamin C is most useful when it can help support skin's defenses during daytime exposure to environmental stressors like UV light and pollution. Applying it at night isn't harmful, but you get more out of it by making it part of your morning routine before SPF.
Do I need to use both vitamin C and retinol, or just one?
Either ingredient delivers visible results on its own. But using both covers more ground: vitamin C helps support visible radiance and even tone during the day, while retinol helps support smoother, more refined-looking skin overnight. Together, they work on different aspects of skin appearance in a way that complements rather than competes.
The Bottom Line
Vitamin C and retinol are complementary ingredients — not conflicting ones. Used in the right routine (vitamin C in the morning, retinol at night), they support a more visible improvement in skin's overall appearance than either does alone.
For a routine built for sensitive skin, pair the Glow Getter Radiant C Serum each morning with the Radical Repair® Retinol Reinvented Serum each night — finished with Dream Cream Nighttime Moisturizer to support a hydrated, rested-looking complexion by morning. All three are formulated for sensitive skin and free of synthetic fragrance.
