
Vitamin C Serum
Brighter skin starts here
Based on a survey of verified KIRO Select customers who used the Vitamin C Energising Booster consistently for at least 30 days. Individual results may vary. This is a cosmetic product, not a medical treatment.
94%
said their skin looked more radiant and even after consistent use
96%
said the formula absorbed easily without feeling greasy or sticky
95%
said they would recommend the KIRO Select Vitamin C Booster to a friend
60-Day Money-Back Guarantee
We stand behind every bottle of KIRO Select Vitamin C Energising Booster with a 60-day risk-free guarantee. If you're not completely satisfied with the look and feel of your skin, simply return it for a full refund — no questions asked, and we cover the return shipping.
What Customers Are Saying
Frequently Asked Questions
FAQ
Can I use this every day?
Absolutely. The formula is designed for both morning and evening use. Use 2–3 drops on clean skin, follow with moisturizer, and always apply SPF in the morning.
Will Vitamin C irritate my skin?
This serum uses 2% Ascorbyl Glucoside, a gentle and stable form of Vitamin C suitable for most skin types including sensitive skin. If you have very sensitive skin, perform a patch test before first use. Discontinue use if irritation occurs.
Does it help with the appearance of dark spots?
With consistent use, Vitamin C and Ferulic Acid help improve the appearance of uneven skin tone and discoloration, leaving your complexion looking brighter over time. Results vary and this is a cosmetic product, not a medical treatment.
Can I use it with my other skincare products?
Yes. Apply the serum to clean skin as the first step, then layer your moisturizer on top. Hyaluronic Acid is already included in the formula, so no separate HA serum is needed. Follow with SPF during the day.
Is it suitable for all skin types?
Yes — it is dermatologically tested and designed for all skin types. Cruelty-free, vegan, gluten-free, and formulated without harsh irritants. Patch test recommended for very sensitive skin.
What is the free shipping threshold?
Free shipping applies on orders of $50 or more. Orders below $50 may have a standard shipping fee applied at checkout.
How fast is shipping?
We process orders within 24–72 hours and deliver within 6–15 days depending on your location, with tracked shipment included.
How do I get in contact?
You can reach our support team by clicking the "Contact Us" section on our store. We're available 24/7.