Why eat 30 different plants a week

Why thirty?

Thirty plants a week.
One garden in your gut.

Plant diversity is the strongest dietary predictor of a healthy gut microbiome — stronger than any single superfood or supplement. Log fruits, veg, grains, legumes, nuts, herbs and spices — watch your weekly variety light up, one plant at a time. Want to make it a game? Start a team with friends and compete for weekly medals.

Be one of the first to track your week.

0of 30 · this week
75%

of microbiome diversity is determined by plant variety — more than any other dietary factor.

AMERICAN GUT PROJECT · 2018 · n=11,336
30+

distinct plant types per week is the threshold above which microbial diversity measurably improves.

McDONALD ET AL · mSYSTEMS · 2018
2×

more short-chain fatty acid producers in eaters of 30+ plants/wk vs. ≤10.

ZOE PREDICT · 2021 · n=1,098
The single greatest factor that determines the health of your microbiome is the diversity of plants in your diet.
Prof. Tim Spector
Genetic epidemiologist · King's College London · ZOE co-founder
What you get
01

Stronger immunity

Around 70% of the immune system lives in the gut. A diverse microbiome means better defence against infection.

02

Better digestion

A variety of fibers supports regularity and a healthy gut lining.

03

Less inflammation

Polyphenols and antioxidants from plants reduce the chronic inflammation linked to many modern diseases.

What counts as a plant

Eat the rainbow

Supplemental to the usual categories (vegetables, fruits, grains…). Colours map to families of phytochemicals.

01 RED
tomato · beet · strawberry
· Lycopene · anthocyanins
02 ORANGE
carrot · sweet potato · apricot
· Beta-carotene
03 YELLOW
turmeric · lemon · banana
· Curcumin · flavonoids
04 GREEN
kale · spinach · basil
· Folate · chlorophyll
05 BLUE
blueberry · fig · plum
· Anthocyanins
06 PURPLE
eggplant · red cabbage · grape
· Resveratrol
07 TAN
oats · walnut · lentil
· Fibre · lignans
Practical tips

How to start

  • Mix the colours — each carries different phytochemicals.
  • Try at least one new plant every week.
  • Add seeds (chia, flax, sunflower) to yogurt or salad.
  • Use herb and spice blends — an easy way to boost diversity.
  • Rotate grains: oats, buckwheat, quinoa, millet, rye.
Start this week

Your gut hosts one hundred trillion microbes. Feed them well.

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