How to Eat 30 Plants a Week (and What Actually Counts)
By Alex Fahey, founder of Chop It. Last updated 31 May 2026.
Short answer: eating 30 different plants a week is a gut-health target popularised by Professor Tim Spector of ZOE, based on a 2018 study that found people who ate 30+ different plants a week had more diverse gut microbiomes than those eating 10 or fewer. The trick is that "plants" is far broader than fruit and veg: wholegrains, beans, lentils, nuts, seeds, herbs and spices all count, and each one only needs to be counted once per week, in any amount. A few plant-rich meals across the week gets you most of the way there.
This guide explains where the number comes from, exactly what counts (and what doesn't), and a realistic way to get there.
Quick answers
- What is the 30 plants a week rule? A guideline to eat 30 different plant foods across a week to support a diverse gut microbiome.
- Where did it come from? A 2018 study from the American/British Gut Project, led in the UK by Tim Spector of King's College London; popularised through ZOE.
- Does the amount matter? No. One strawberry or a sprinkle of a spice counts the same as a full portion — it's about variety, not quantity. You count each plant once per week.
- What counts as a plant? Fruit, vegetables, wholegrains, beans and pulses, nuts, seeds, herbs and spices. Coffee, tea, dark chocolate (70%+) and extra-virgin olive oil count too, in moderation.
- What doesn't count? Different varieties of the same plant don't multiply (a red and a green apple is still one plant point), and the same plant eaten twice in a week only counts once.
- Is 30 realistic? Yes — most people are surprised how fast it adds up once herbs, spices, nuts and grains are in play. A single mixed meal can rack up 8–10.
- How is this different from five-a-day? Five-a-day counts portions for general health; 30 plants counts variety specifically for gut diversity. They're complementary, not competing.
Where the number actually comes from
The 30-plant target isn't a marketing invention. It comes from the American Gut Project, a large citizen-science study published in 2018 that collected gut samples from over 10,000 people across the US, UK and Australia. Tim Spector of King's College London led the UK arm (the British Gut Project).
The finding was specific: participants who ate 30 or more different types of plant a week tended to have a more diverse gut microbiome than those who ate 10 or fewer — and more of the "good" bacteria associated with a healthy gut. A more diverse microbiome is linked to better digestion, a more resilient immune system, and lower risk of conditions including type 2 diabetes and heart disease.
It's worth being precise about what the study showed: it found an association between plant variety and microbiome diversity in a large observational dataset. It wasn't proof that hitting exactly 30 cures anything. But the direction is well supported, and a 2024 randomised trial (BIOME) comparing a 30-plant blend against a probiotic added further weight to the idea that variety of plants — not a single supplement — is what gut bacteria thrive on.
The headline shift, in Spector's framing: the old "five a day" was about quantity; "30 plants a week" is about diversity. He describes the gut as a garden that does better planted with many different species than with a lot of one.
Why variety beats counting calories (for your gut)
Most diet advice is about less — fewer calories, less fat, less sugar. Gut health is one of the few areas where the advice is about more and more varied.
Different plants feed different gut bacteria. Broccoli, oats and black beans each keep different microbes happy; no single food feeds them all. That's why a diet built on three or four "healthy" staples can still leave your gut under-fed — the range is what matters.
This connects to a quieter UK problem: fibre. Government guidelines recommend adults eat 30g of fibre a day, but the average UK adult eats only around 20g — and according to the National Diet and Nutrition Survey, just 9% of adults actually hit the target. Plant variety and fibre go hand in hand: the foods that push up your plant count (pulses, wholegrains, nuts, seeds, veg) are the same ones that close the fibre gap. Chase variety and the fibre largely takes care of itself.
What counts as a plant (the full list)
This is where most people undercount. Plants aren't just the vegetables on your plate. Every one of these counts as a "plant point," and each counts once per week:
| Category | Examples |
|---|---|
| Vegetables | Carrots, broccoli, spinach, peppers, onions, courgette, leeks, tomatoes |
| Fruit | Apples, berries, bananas, oranges, kiwi, avocado |
| Wholegrains | Oats, brown rice, wholewheat pasta, quinoa, barley, rye |
| Beans & pulses | Chickpeas, lentils, kidney beans, butter beans, peas |
| Nuts | Almonds, walnuts, cashews, peanuts, hazelnuts |
| Seeds | Pumpkin, sunflower, chia, flax, sesame |
| Herbs | Basil, coriander, parsley, mint, rosemary, thyme |
| Spices | Cumin, turmeric, paprika, cinnamon, ginger, black pepper |
| Extras (count, in moderation) | Coffee, tea, dark chocolate (70%+), extra-virgin olive oil |
The rules that catch people out:
- Amount doesn't matter. A single olive, a few coriander leaves, or a teaspoon of cumin each count as one plant. You don't need a portion.
- Variety, not repetition. Eating spinach three times this week is still one plant point. The week resets the count.
- Different types of the same plant don't multiply. A red apple and a green apple are one point. But different species do count separately — a chickpea and a kidney bean are two.
- Herbs and spices are the cheat code. A spice-heavy curry or a herby dressing can quietly add five or six plant points to a single meal.
A realistic week
You don't need a spreadsheet. Here's how fast it stacks up across ordinary meals:
- A bowl of porridge with berries, nuts and seeds: oats, blueberries, almonds, chia, flax = 5 plants.
- A chickpea and veg curry: chickpeas, onion, garlic, tomato, spinach, plus cumin, turmeric, ginger, coriander = 9 plants.
- A simple lunch salad: mixed leaves, cucumber, pepper, avocado, pumpkin seeds, olive oil, a squeeze of lemon = 7 plants.
That's three meals and you're already past 20, with overlaps trimmed. Add a couple of snacks (an apple, a handful of walnuts) and one more varied dinner, and 30 is in reach by Sunday.
The difficulty isn't eating 30 plants. It's keeping track of which ones you've had, and not defaulting to the same five all week.
The catch: keeping count is the hard part
Most people who try the 30-plant challenge hit the same wall. You start a tally in a notes app, forget it by Wednesday, and never find out whether you hit the target or stalled at 14.
This is the problem Chop It was built around. Instead of asking you to count by hand, it tracks the variety of your week through a Weekly Diversity Score — plants, fibre and protein across everything you've planned — so you can see whether your week is varied or stuck in a rut, and where the gap is. It also keeps your comfort food in the mix rather than swapping it for "healthier" versions: the idea is more variety without dropping the meals you actually like.
It won't cook for you, and 30 plants is achievable with a notebook and some discipline. But if tracking is what's beaten you before, having the count kept automatically is what turns it from a one-week experiment into a habit.
Frequently asked questions
How many plants should I eat a day? There's no official daily plant target — the guideline is weekly (30 different plants across the week). Spread across a week that's roughly four to five different plants a day, which a couple of varied meals easily covers.
Do herbs and spices really count? Yes, and they're the easiest way to climb the count. Each herb and spice counts as one plant point, so a well-spiced dish can add several at once. Tim Spector specifically points to herbs, spices, nuts and seeds as the foods people forget to count.
Does coffee count as a plant? Yes — coffee, tea, dark chocolate (70% cocoa or higher) and extra-virgin olive oil all count, because they're rich in the beneficial plant compounds (polyphenols) gut bacteria feed on. Enjoy them in normal moderation; they're a bonus, not a strategy.
Is 30 plants a week the same as five-a-day? No. Five-a-day counts portions of fruit and veg for general health. 30 plants counts the variety of all plant foods (including grains, pulses, nuts, herbs and spices) specifically to support a diverse gut microbiome. They work together — hitting 30 plants will usually take care of five-a-day too.
What if I have IBS or a sensitive gut? Increase variety and fibre gradually, and drink plenty of water — a sudden jump can cause bloating and gas while your gut adjusts. If you have IBS or a diagnosed gut condition, some fermentable fibres can trigger symptoms, so check with your GP or a dietitian before making big changes.
Does it have to be exactly 30? No. 30 is a memorable target from the research, not a magic threshold. The principle is "more variety is better" — going from 10 to 20 different plants is a meaningful improvement on its own. Aim in the right direction rather than obsessing over the exact number.
Can I hit 30 plants on a budget? Yes — tinned beans, frozen mixed veg, oats, a bag of mixed seeds and a spice rack are cheap and each add multiple plant points. Variety doesn't require expensive ingredients; it requires different ones. Frozen and tinned count exactly the same as fresh.
The bottom line
Eating 30 plants a week is unusual advice in that it's about more, not less: no banned foods, no calorie counting, just a wider range. The science behind it is sound, the target is achievable, and the only real difficulty is keeping track.
Start by counting one normal week — you'll probably land between 10 and 20, and be surprised it isn't higher. Then add the easy wins: a mix of seeds on your breakfast, beans in a stew, an extra herb or spice, a vegetable you don't usually buy. The count climbs quickly once you stop repeating the same staples.