For 31 years, I was a pharmacist. And for 31 years, I sold you serums that couldn't work

The rare testimony of a former pharmacist from Lyon, who resigned from her practice in November 2024, and who now explains why 9 out of 10 vitamin C serums are ineffective, or even counterproductive, on skin over 55 years old.

By the editorial team · Updated May 11, 2026 · Reading time: 7 minutes

Sophie L., 62, never imagined giving an interview. For three decades, she ran a pharmacy in Lyon's 6th arrondissement. A loyal clientele, many women aged 50-70, the quiet rhythm of neighborhood pharmacies.

 

In November 2024, she hung up her lab coat. Without fuss, without drama, without a media send-off. Overnight.

 

Today, she agrees to speak out, provided her last name is not mentioned.

 

"I don't want to be at war with my former colleagues. I just want women aged 60 and over to understand what they've been sold for the past 20 years."

 

It took us three months to convince her. Here is her story.

THE NIGHT EVERYTHING CHANGED

"My mother is 84 years old. She lives in Vienne, 30 kilometers from Lyon. One Sunday evening in November, I was at her place for dinner. Nothing out of the ordinary, we had been doing that once a month since my father passed away."

 

Sophie paused.

 

"We were finishing eating. She stood up to clear the table. And as she passed the hall mirror, the one where she hangs coats when we arrive, she paused. Three seconds, no more. She looked at herself. And she said to me, without turning around: 'Sophie, my daughter, nothing ever worked. I'm 84 years old and I no longer have a face.'"

 

She lowered her eyes for a few seconds before continuing.

 

"My mother spent nearly 40,000 euros on anti-aging creams in her life. I know, because for 20 years, I was the one who sold them to her. Vichy. La Roche-Posay. Caudalie. Lancôme for a while. Estée Lauder for her birthday. Everything was tried. And that evening, in her living room, she told me it had been for nothing."

 

She let a moment pass.

 

"I realized that for 30 years, I had been part of the problem."

 

Three months later, she left the pharmacy.

WHAT THEY NEVER TELL YOU BEHIND THE COUNTER

Sophie begins by painting a picture that few women truly understand.

 

"An independent pharmacy in France is a small business. We sell reimbursed medications at a loss or with low margins. We make up for it with what's called parapharmacy: creams, serums, supplements, shampoos, hygiene products. That's where the real margins are made. Without that, the neighborhood pharmacy would close in six months."

 

She pauses.

 

"So cosmetic laboratories know this. And they don't send us doctors. They send sales reps. And these sales reps don't talk to us about your skin. They talk to us about margins, bonuses, gift sets, quarterly targets. One day, one of them told me, exactly these words: 'Anyway, at that age, they don't see a difference anymore.' I was 58 at the time. I was holding the bottle in my hand. I didn't say anything. I should have. I didn't."

 

She looks us straight in the eye.

 

"That's the first thing I want women over 60 to understand. When a 30-year-old pharmacist advises you on a serum behind the counter, 9 times out of 10, she's not advising you. She's selling what her boss told her to highlight this week. Because there's a 15% bonus on volume. Because the sales rep is coming on Friday. Because the brand is organizing a workshop next Saturday at the pharmacy."

 

Sophie remains silent for a few seconds.

 

"It's nobody's fault, really. It's just how the system works. But you, you're paying 40, 50, 60 euros for a bottle, thinking you've been given advice. And that's why for 31 years, I preferred not to think about it anymore."

 

But the worst isn't there.

 

The worst is in the formula itself.

WHY YOUR SERUM STINGS, AND WHY IT'S NOT YOUR FAULT

"If you've ever tried a vitamin C serum in your life, there's a 70% chance it stung you. Burned slightly. Reddened your left cheek for two days. Or tightened your skin in the evening."

 

Sophie catches her breath.

 

"And there's a 100% chance that someone told you at that moment, exactly this phrase: 'It's normal, it means it's working.' Either by the salesperson at the pharmacy. Or by the product description. Or by your daughter who read an article online."

 

She pauses.

 

"That phrase is one of the biggest lies in cosmetic marketing of the last 20 years. Your skin isn't reacting badly. Your skin is right. It's telling you that this product wasn't designed for it."

 

Sophie begins to explain.

 

"In 9 out of 10 vitamin C serums sold today in France, the active ingredient used is pure ascorbic acid. It's the cheapest form to produce. It's also the most unstable. It has a major flaw that laboratories have known about for 30 years: it oxidizes on contact with oxygen. That is, on contact with air."

 

She lets that sink in.

 

"Do you understand what that means? At the exact moment you spread the serum on your cheek, the active ingredient is already degrading. While it should be working on your skin, it's turning into inactive by-products. And these oxidation by-products are irritating. That's why it stings. That's why it reddens. That's why, after 3 months, you look at your bottle that has turned dark orange and say to yourself, 'I just threw 40 euros out the window.'"

 

Sophie fixes us with her gaze.

 

"You didn't throw away 40 euros. You paid 40 euros to apply a dead active ingredient. To irritate your skin in the process. For 30 years, in my pharmacy, I sold these serums. Without knowing it, I was selling you colored water."

 

And then there's the other problem, that no one talks about.

 

"These serums are not tested on your skin. They are tested on women aged 25 to 40. Not to measure their actual effectiveness. Just to check that there are no severe allergic reactions. On skin that still produces estrogen. On skin that still has its collagen. On skin that is not yours."

 

She delivers the last sentence softly.

 

"Your skin, at 60, at 65, at 70, has never been in the laboratory's specifications. You are a customer. You are not a research target."

 

But then, what is available for us?

THE ALTERNATIVE THAT HAS EXISTED FOR YEARS, BUT WHICH MAJOR BRANDS REFUSE TO USE

"When I resigned, I gave myself six months. Not to look for another job. To understand. I wanted to know if there was, somewhere, a stable form of vitamin C. One that doesn't oxidize on contact with air. One that reaches the skin intact. And one that doesn't sting menopausal skin."

 

Sophie pauses, as if to measure the importance of what comes next.

 

"I spent whole days reading. Scientific publications, patents, reports from dermatology conferences. And after three months, I found it. It exists. It has existed for a long time. And it's called Ethyl Ascorbic Acid."

 

She continues softly.

 

"Specifically, it's a derived form of vitamin C. Chemists took the classic molecule and added a small group to it, called an ethyl group. This group acts as a shield. The active ingredient remains stable on contact with air. Stable on contact with skin. And only degrades once it has penetrated the dermis. Only then does the shield withdraw, and the vitamin C is released, intact, exactly where it needs to work. On your collagen. On your complexion. On that radiance you've lost over the last ten years."

 

Sophie falls silent.

 

"Concretely, that means three things. One: it doesn't sting. Two: it doesn't cause redness. Three: the bottle doesn't yellow, it remains clear to the last drop. You pay for active vitamin C, and you apply active vitamin C. It's that simple."

 

So why is no one talking about it?

 

"That's the question I asked myself for three weeks. Why, if this form exists, if it's better, if it's gentler, don't major brands use it? Why do they continue to put pure ascorbic acid in 50-euro bottles, knowing that it will oxidize even before the bottle is finished?"

 

She smiles for the first time in the interview, but it's a bitter smile.

 

"The answer is simple. Ethyl Ascorbic Acid costs between 7 and 10 times more to produce. When you manufacture 200,000 bottles a month for a brand that has to feed shareholders, you can't afford it. So you continue with pure ascorbic acid. You put more marketing in to compensate. And you sell products to 60-year-old women that weren't designed for them, because it's profitable."

 

Sophie leans slightly forward.

 

"And that, I couldn't do anymore. That's why I looked for the opposite. A small laboratory that would have dared to use this form. One that wouldn't manufacture 200,000 bottles a month. One that wouldn't have shareholders to feed. One that would formulate for the skin, not for the margin."

 

I found one. Only one.

Serolys Super C Serum

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