Collagen: everything you really need to know

Cross Interview with Dr. Jérôme Paris and Mélanie Huynh, Founder of Holidermie

At the heart of the new Inside & Out beauty routines, collagen intrigues as much as it fascinates.

Between proven effectiveness, marine or vegetarian variations, and the need for regular intake, it’s not always easy to get a clear picture...
A few weeks ago, we asked all your unfiltered questions to Dr. Jérôme Paris, skin health expert, and then gave the floor to Mélanie Huynh, Founder of Holidermie, to understand how collagen fits into her vision of Inside & Out beauty.

Is oral collagen really effective?

Dr. Jérôme Paris

Yes, oral collagen works. In recent years, several major clinical studies and meta-analyses have demonstrated its effects on skin hydration, density, and quality.

For a long time, it was believed that collagen peptides were too broken down to be absorbed, but science has now confirmed that regular intake over several weeks leads to visible and measurable results.

Marine collagen, vegetarian collagen: what’s the difference?

Dr. Jérôme Paris

There are several types of collagen, each with a specific role in the body.

Type I is found in the skin — it supports firmness and helps prevent wrinkles.
Type II is associated with joints.
Type III supports muscle tissues.

Marine collagens are mainly rich in Type I, while certain vegetarian collagens — particularly those derived from the inner membrane of the eggshell, offer a more varied composition.

What makes Ovoderm® collagen special?

Dr. Jérôme Paris

Ovoderm® collagen comes from the inner membrane of the eggshell.

It combines several types of collagen (I, V, and X), along with hyaluronic acid and glycosaminoglycans, all essential for maintaining the structure of the dermis.

This natural synergy promotes skin firmness, hydration, and elasticity.

How long does it take to see results?

Dr. Jérôme Paris

Studies show that it takes 8 to 12 weeks of daily intake to see the first effects.

The skin gradually becomes firmer, plumper, and more radiant.
Continuing beyond this period helps to maintain long-lasting results.

What makes Holidermie’s collagen unique?

Mélanie Huynh, Founder of Holidermie

Our formulas combine three key active ingredients: collagen, vitamin C, and hyaluronic acid — a trio that acts on both skin structure and hydration.

Historically, we have worked with marine collagen, but we have also developed a vegetarian alternative using Ovoderm® eggshell membrane.

Our approach is holistic: inner beauty supports outer beauty, with no compromise between effectiveness and pleasure.

How to properly integrate collagen into your routine?

Dr. Jérôme Paris

To achieve results, daily intake is essential, ideally in the morning, with around 10 g of hydrolyzed collagen per day.

Consistency over at least 8 to 12 weeks is what ensures visible and lasting effects.

Mélanie Huynh, Founder of Holidermie

The key is to make this step natural and enjoyable. Depending on your habits, you can choose the powder sticks to mix with your drink or the vegetarian capsules.
Beauty begins with simplicity and consistency, not constraint.

What collagen formats does Holidermie offer?

Mélanie Huynh, Founder of Holidermie

We’ve designed our collagen range in multiple formats to suit every lifestyle:

• Classic powder and on-the-go sticks for a daily ritual,

• Vegetarian Ovoderm® alternative,

• Indulgent options like our Collagen Cocoa Cubes or Collagen & chocolate cream 

   

Our goal: to make collagen a beauty and wellness ritual that’s both effective and desirable.

An Inside & Out, and In Motion approach

At Holidermie, beauty is approached in its entirety:

• What we consume (Inside),

• What we apply to the skin (Outside),

• And how we mechanically activate these benefits through gestures and beauty tools (In Motion).

Collagen naturally sits at the heart of this conscious, holistic, and lasting vision — where each pillar reinforces the other, revealing a living, evolving, and deeply personal beauty.