Evidence over marketing

ZADA
Guides & e-books

The knowledge, condensed into one document.

In-depth guides bring together what is otherwise scattered across studies, clinical guidelines and specialist articles — structured, readable and fully referenced.

Featured

Evidence-Based Anti-Aging Guide

What is actually supported by evidence against skin ageing — from sun protection and retinoids to nutrition, sleep and aesthetic treatments. Including a sober assessment of what supplements can and cannot do.

Contents

  • How skin ages: intrinsic and extrinsic factors
  • The four measures with the strongest evidence
  • Active ingredients compared: evidence, effect, limits
  • Treatments: benefit, risk and realistic expectations

€29

Further titles

In preparation.

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Botox — What You Should Know Before Treatment

What genuinely matters before a first treatment: how it works, realistic results, risks, the questions to ask your practitioner, and the common mistakes made when choosing one.

  • How botulinum toxin works — and what it cannot do
  • Ten questions to ask before treatment
  • Risks, side effects and warning signs

€19

The Evidence-Based Skincare Guide

A complete skincare framework: which ingredients are supported by evidence, what a sensible routine looks like, and how to recognise products you do not need.

  • Ingredients ordered by the strength of the evidence
  • Routines for the most common skin types
  • How to read an ingredients list

€24

Aesthetic Treatments: What Is Worth Your Money?

A sober comparison of aesthetic treatments by cost, demonstrated benefit, downtime and risk — as a basis for decision-making before a first consultation.

  • Cost and demonstrated benefit compared
  • Which procedures sensibly complement each other
  • How to recognise a reputable provider

€24

Digital products are made available for download immediately after purchase. On the right of withdrawal for digital content and its early expiry, see Right of withdrawal