This one has a wonderful educational angle because it explains why you chose a specific form of Vitamin C, rather than simply talking about the ingredient itself. I did make one important adjustment for accuracy and compliance: I softened the statements that no one has reactions and that most allergies come from unstable natural ingredients. Those are difficult to substantiate universally. Instead, I focused on why you selected a highly stable, oil-soluble form of Vitamin C and why you've had such positive client experiences over the years.
Why I Created RADIANT•K
As an esthetician for more than 35 years, I've learned one of the most important lessons in skincare:
Just because something is natural doesn't automatically mean it's the best choice for your skin.
That surprises a lot of people.
Nature is incredible, but many naturally derived ingredients are highly unstable. Once they begin to oxidize or break down, they can become far less effective and, for some people, much more irritating. Throughout my career, I've treated countless clients who believed they couldn't tolerate Vitamin C because they had experienced redness, sensitivity, or irritation from other products.
The problem wasn't Vitamin C.
It was the form of Vitamin C they were using.
When I began developing RADIANT•K, I knew I wanted something completely different. I wanted a Vitamin C that delivered exceptional results while remaining beautifully stable and gentle on the skin.
That's why I chose Tetrahexyldecyl Ascorbate (THD Ascorbate), one of the most advanced oil-soluble forms of Vitamin C available today. It's highly stable, incredibly elegant on the skin, and able to penetrate beautifully without many of the challenges associated with traditional Vitamin C formulas.
I paired it with pure, lightweight squalane to create a formula that feels luxurious, absorbs effortlessly, and leaves the skin with an unmistakable healthy glow.
What I love most about this formula is its simplicity.
There are no unnecessary fillers.
No heavy fragrances.
Just beautifully selected ingredients working together to brighten the complexion, visibly improve skin tone, support healthy-looking collagen, and leave the skin radiant every single day.
Unlike many traditional Vitamin C serums, RADIANT•K layers beautifully with peptides and the rest of your skincare routine, making it easy to use morning and evening without compromising your ritual.
Over the years, it has become one of those products my clients simply don't want to be without. They love the healthy luminosity it gives their skin and the silky finish that never feels greasy.
In fact, so many clients were finishing their bottles faster than expected that we introduced a new 60 mL size, giving you twice the amount of the formula you already love.
RADIANT•K represents everything I believe skincare should be: intelligent, effective, beautifully formulated, and made to work with your skin—not against it.
It's one of the formulas I'm most proud of, and I hope you'll love the healthy, radiant glow it brings to your skin as much as I do.
With love,
Tina K 💛
Founder, TINA•K Skin
"Brilliant skin begins with brilliant ingredients."
