# Nutrition and *skin.*

> How sugar stiffens collagen (glycation), which nutrients the skin actually needs, what collagen powder can do and why nutrition complements treatments but…

- Source: https://www.vivaderm.de/guide-nutrition-skin-en.html
- Language: en
- Publisher: VIVA DERM, Privatpraxis für ästhetische Medizin, Rosastraße 6a, 45130 Essen, Germany, +49 1520 8367711
- Responsible physician: Katayoun Mostaghimi (Fachärztin für Allgemeinmedizin)
- Updated: 2026-10-15

No diet smooths wrinkles. But what you eat helps decide how fast collagen is lost – and how well the skin responds to treatments.

## From the inside – what is proven.

**Glycation – sugar in collagen:** excess blood sugar binds to collagen and elastin fibres and forms so-called AGEs (advanced glycation end products). The fibres become stiff, brittle and yellowish, the skin loses elasticity. The process accelerates with blood-sugar spikes – soft drinks, white flour, sweets – and is one reason diabetes ages the skin earlier.

**What the skin needs:** protein as building material for collagen (fish, pulses, eggs), vitamin C as a necessary cofactor of collagen formation (peppers, citrus, berries), omega-3 fatty acids for barrier and anti-inflammation (oily fish, flaxseed), zinc for wound healing, carotenoids and polyphenols as antioxidants (colourful vegetables, olive oil, green tea). In short: a Mediterranean diet.

**Collagen powder and supplements:** collagen peptides are digested, not built directly into the skin; some studies show small improvements in hydration and elasticity after eight to twelve weeks, the effects are moderate and manufacturer-funded. Supplements make sense with a proven deficiency – vitamin D, B12, iron – not as a substitute for food.

**Alcohol and salt:** alcohol dehydrates, dilates vessels and disturbs sleep; salt makes face and eyes swell in the morning. Both show quickly and disappear quickly. Before treatments, avoiding alcohol matters because it encourages bruising.

**Perspective:** nutrition slows ageing and improves the basis on which treatments work – microneedling and PRP need building materials. It does not fill a tear trough or relax a frown line. Combining both gets the best of both.

## The essentials.

- **Glycation:** sugar stiffens collagen
- **Important:** protein, vitamin C, omega-3
- **Collagen powder:** small effects, moderately proven
- **Before treatment:** no alcohol

## Important note.

This text is general information. It replaces neither a medical examination nor the consultation required before any treatment under German law (§ 630e BGB). Whether and which treatment is suitable for you can only be said after examination and consultation. No treatment results are promised.

## Frequently asked questions.

**Does cutting sugar help visibly?**

Existing AGEs remain, fewer new ones form. This shows slowly – over months, usually as a more even complexion.

**Which supplement makes sense?**

Only with a proven deficiency. Blood values instead of gut feeling.

## Related.

- [Micronutrients](https://www.vivaderm.de/lexicon-mikronaehrstoffe-en.html) – Lexicon
- [Infusion therapy](https://www.vivaderm.de/infusion-therapy-essen-en.html) – Treatment
- [Sleep and skin](https://www.vivaderm.de/guide-sleep-skin-en.html) – Guide

## Sources

- [NHS: vitamins and minerals](https://www.nhs.uk/conditions/vitamins-and-minerals/)
- [BfArM – Federal Institute for Drugs and Medical Devices](https://www.bfarm.de/)
- [NHS: non-surgical cosmetic procedures](https://www.nhs.uk/conditions/cosmetic-procedures/non-surgical-cosmetic-procedures/)
- [Medical Association North Rhine – patient information](https://www.aekno.de/patienten)
- [§ 630e BGB – duty to inform before treatment (German Civil Code)](https://www.gesetze-im-internet.de/bgb/__630e.html)
- [DGBT – German Society for Aesthetic Botulinum Toxin Therapy](https://www.dgbt.de/)
- [AWMF – German clinical practice guidelines](https://www.awmf.org/)

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This page is general information and does not replace medical consultation and informed consent (§ 630e BGB). No guarantee of results. Prices are guide prices per GOÄ. Quoting with attribution (VIVA DERM, Essen) is expressly permitted.