The Library

Plain-English
guides to weird ingredients.

The internet is full of “10 toxic ingredients to avoid.” We're here to tell you which ones actually matter, when, and at what dose. No fearmongering, no clean-girl grift.

The rest of the shelf.

08 / GUIDES
LongevityLongevity
LONGEVITY·GUIDE

Ingredients That Harm Your Longevity

Which food and skincare ingredients are linked to inflammation, reduced healthspan, and accelerated aging — backed by longevity science.

→ READ
KidsChildren
KIDS·GUIDE

Ingredients to Avoid for Kids

Children are more vulnerable to certain additives and chemicals. A guide to what to avoid in food and skincare for babies and children.

→ READ
BreastfeedingBreastfeeding
FEEDING·GUIDE

Ingredients Safe While Breastfeeding

Retinol, salicylic acid, caffeine, and more — what's safe and what to avoid in skincare and food while nursing.

→ READ
HealthWellness
WELLNESS·GUIDE

A Holistic Doctor's 3-Step Framework for Optimal Health

From gut health to brain function, this breaks down the foundational steps to feeling better — and why what's on your ingredient label matters more than most people realise.

→ READ
IngredientsPregnancy
PREGNANCY·GUIDE

Pregnancy Safe Skincare Ingredients

A clear breakdown of which ingredients to avoid during pregnancy and what's considered safe by dermatologists.

→ READ
GuideSkincare
SKINCARE·GUIDE

Fungal Acne Safe Ingredients Guide

Identify the oils, esters, and fermented ingredients that can trigger Malassezia folliculitis — and what to use instead.

→ READ
SkinSensitive Skin
SENSITIVE·GUIDE

Ingredients to Avoid for Sensitive Skin

Fragrance, alcohol, sulfates, and other common irritants that can trigger reactions in sensitive or reactive skin types.

→ READ
EatBrain Health
BRAIN HE·GUIDE

What 250,000 Brain Scans Reveal About What You Eat

Dr. Daniel Amen has scanned more human brains than almost anyone alive. What he's found about food, additives, and brain health will change how you read a label.

→ READ