1
Teeth: built to process variety
Human teeth do many jobs — cut, tear, crush, and grind.
- IncisorsCut
- CaninesTear
- PremolarsCrush
- MolarsGrind
Our mouths are built for a varied, mixed diet with real chewing power.
Human Biology Loves Plants
Not because humans are one simple category, but because fiber, microbes, teeth, and amino acids all tell a richer story.
Human BiologyGut MicrobiomeProtein BasicsNot Medical Advice
- Chew & break downYour teeth cut, tear, crush, and grind a wide range of foods.
- Plant fiberFiber from plants passes through you, but becomes fuel for your microbes.
- Gut microbiomeYour microbes ferment that fiber and produce helpful compounds.
- Energy & benefitsShort-chain fatty acids and nutrients support cells, immune function, and more.
2
Fiber: the plant-only signal
Fiber is found in plants — your body can't fully digest it, but your gut microbes thrive on it.
- Beans & lentils
- Oats & whole grains
- Berries & fruit
- Greens & veg
Happy gut microbes
Your microbes ferment what you can't, and make compounds that support you.
3
Protein: amino acids, not meat magic
Protein is made of amino acids — and plants contain amino acids.
- Sunlight
- Plants
- Amino acids
- Human body
A varied plant-based diet with enough calories can supply the amino acids you need.
4
Milk: infant food, adult adaptation
Human milk is made for human infants. After infancy, lactase persistence (the ability to digest lactose) varies widely by population — roughly 65% of people worldwide have reduced lactase after infancy.
Human milkPerfect for infants
Lactase genePersistence varies
Worldwide variation~65% have reduced lactase after infancy
Enjoy or avoid dairy based on your body and your values.
Comparative biology only — this is not infant-feeding advice.
Sources & citations (6)Tap to open
- Teeth: Anatomy, Types, Function & Care
- Fiber (The Nutrition Source)
- Fiber (MedlinePlus Medical Encyclopedia)
- Protein in diet (MedlinePlus Medical Encyclopedia)
- Amino acids (MedlinePlus Medical Encyclopedia)
- Lactose intolerance (MedlinePlus Genetics)
We summarize these sources in our own words and link to the originals. Summaries can simplify nuanced findings — follow the links for the full picture.