Dermatoligist Diaries

Dermatologist explains why Vitamin C helps Rosacea - AND reveals the best serum to help it 

Written by Dr.Marcus 

Published on August 4th, 2025

Women with rosacea often have bad experiences with Vitamin C serums. Whether you’ve tried 1 serum, or 10, most of them will cause irritation as soon as you use them. Our condition means that with our super sensitive skin, any new product is at risk of giving us flare ups and that horrible burning sensation.

 

However, what if I was to tell you that Vitamin C has been proven to help rosacea? This is hard to believe with how many bad experiences it causes, but a lot of recent studies show that Vitamin C serums are beneficial for controlling rosacea.

What the Research tells us

The studies tell us that Vitamin C can help reduce redness and irritation, while also repairing damaged skin barriers. But how can it do this?

Strengthens Blood Vessels: A Vitamin C serum helps reinforce fragile blood vessels, directly addressing one of the primary issues of rosacea. This reduces the appearance of redness in the face, giving you confidence in your clear skin.

Improves Skin Barrier Function: Vitamin C supports collagen production and boosts hydration. This restores the barrier's ability to hold moisture, making it less sensitive .

Protection from Environmental Damage: Vitamin C's antioxidant properties help neutralize free radicals, which weaken skin cells and damage the skin barrier. The anti-oxidant properties fight back against your rosacea, making sure those mid-day breakouts are thing of the past. 

So why have I had a bad experience in the past?

The simple reason is that nearly all Vitamin C serums aren’t made to help rosacea. Let’s break down the science behind why

 

1. The type of Vitamin C used is TERRIBLE for sensitive skin

Most Vitamin C serums use L-Abscorbic Acid as the vitamin C ingredient. This can be really irritating for those with sensitive skin, and most likely is the main reason you’ve had a bad experience in the past.

 

2. They always use Niacinamide

Pretty much every vitamin C has niacinamide somewhere in their ingredient list. It’s been proven to be really harsh (especially in large %s) for women with rosacea, causing irritation and flare ups when used.

 

3. The ingredients are too harsh for sensitive skin

The ingredients in most will break down your skin barrier if you have sensitive skin. If you already had a damaged skin barrier … well good luck.

If I have Rosacea, what Vitamin C products should I be using?

We've done extensive research into the products that are safe to put on sensitive skin. The main points to look out for are ones that don't use L-Ascorbic Acid as the vitamin C ingredient, don't include Niacinamide, and generally have gentle ingredients such as Phloretin. 

 

Here's the 3 Products that I've found the best success recommending to my patients

1. SkinCeuticals Phloretin CF Serum

Effectiveness: 8/10 

Price: $180

Safety: 80% 

Visible Results: After 10 Days

Overall Value: B+

 

SkinCeuticals Phloretin CF Serum is a great option, however it contains L-Ascorbic Acid and is also extremely expensive. If it's in budget, great! If not, don't worry. There's other serums that are just as good, if not better, at a fraction of the price. 

Purchase SkinCeuticals Phloretin CF

2. Sunday Riley's Vitamin C Serum

Effectiveness: 7/10 

Price: $80

Safety: 70% 

Visible Results: After 7 Days (if it works)

Overall Value: C

 

Sunday Riley's Vitamin C serum is what I used to recommend to my patients, but after recent research findings I tend to stay away now. Using a high Vitamin C % with L-Ascorbic Acid, there's a good chance it can cause breakouts. It's good, but for the price, I'd stay away.

3. Dermora's Clear Glow Stabilizied Vitamin C Serum

Effectiveness: 10/10 

Price: $40

Safety: 100% 

Visible Results: After 7 Days

Overall Value: A+

 

In the past 6 months I've started recommending Dermora to my patients, and this has consistently brought the best results. They use a type of Vitamin C called Aminopropyl Ascorbyl Phosphate, which recent studies have shown it's the leading Vitamin C derivative for women with sensitive skin. 

 

It has also replaced niacinamide with phloretin, a great way to not overload the skin barrier and bring great results without constant breakouts. 

 

Also coming in at just $40 (and an even better offer with their 90-day programme), it's by far the best value for money I've seen in the Vitamin C market these days. 

 

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Unique Value Proposition

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Patient Results

In the past 6 months, Dermora's became my number 1 recommendation to all my patients who suffer from rosacea and sensitive skin. Here are some of their incredible improvements.

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FAQs

The Three Most Common 

Questions from my Patients

If I have Rosacea, why do I need Vitamin C? 

Recent studies show that Vitamin C helps women who suffer from rosacea in THREE main ways. It strengthens blood vessels, improves skin barrier function, and protects skin from environmental damage.

If Vitamin C helps, why have I had bad experiences? 

The main reason is that the main Vitamin C derivatives used in serums aren't meant for senstive skin. L-Abscorbic Acid is the most common, and often gives women with Rosacea breakouts FAST. Pair this with harsh ingredients such as niacinamide, and any women with rosacea will experience irritation.

What should I look for in a Vitamin C serum if I have Rosacea?

Main things to look for 

 

- Uses Aminopropyl Ascorbyl Phosphate as their Vitamin C derivative. It's the leading Vitamin C for sensitive skin.

 

- Doesn't include niacinamide. Its proven to cause breakoits for women with rosacea. 

 

- Includes Phloretin, along with other gentle ingredients.

Breakdown of why I recommend Clear Glow for Sensitive Skin

Clear Glow

Other Vitamin C Serums

Uses Aminopropyl Ascorbyl Phosphate (Best Vitamin C for Senstive Skin)

Removed Niacinamide from Ingredients 

Uses gentle ingredients (such as Phloretin) to minimize risk of breakouts

Under $50 (The maximum I like to spend on a serum)

100% Safe Ingredients List - Made for sensitive skin in mind

Voted No. 1 for Women with Rosacea

Check Out The Markets Leading Vitamin C Serum for Rosacea

But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born a

Reduces Visible Redness: Vitamin C strengthens Blood Vessels

Suitable for Sensitve Skin: Gentle Active Ingredients made for those with senstive skin

Uses the Highest Quality Vitamin C: Research shows Aminopropyl Ascorbyl Phosphate is the leading Vitamin C derivative for treating Rosacea

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