Habit swap

Junk food vs vegetables: crowd it out, do not fight it

Banning foods tends to backfire. Adding vegetables first fills the plate and the stomach, and leaves less room for the rest.

Drop

Junk food

Ultra-processed food is linked to over 30 health problems, and it makes you eat more without noticing.

How to quit

Build

Vegetables

Add a serving of vegetables to your meals, one plate at a time.

How to build it

The verdict: Do not start by removing. Start by adding: a portion of vegetables first at meals and snacks keeps you fuller, and junk food gets crowded out.

Side by side

Junk food vs vegetables

Junk foodVegetables

Fullness: Junk food: Easy to overeat: about 500 extra calories a day in one trial.; Vegetables: Water and fibre fill you up for fewer calories.
Heart: Junk food: Linked to about 50% higher risk of heart disease death.; Vegetables: More fruit and veg is linked to lower heart disease risk.
Weight: Junk food: Weight gain within two weeks in a controlled trial.; Vegetables: Helped people lose more weight in a year-long trial.
Convenience: Junk food: Fast and everywhere.; Vegetables: Fast too, if it is washed and ready.
Target: Junk food: No safe amount to aim for.; Vegetables: At least 400 g, or 5 portions, a day.

What it costs

The case against junk food

You eat more without trying

In a controlled trial, people offered ultra-processed food ate about 500 more calories a day and gained weight in two weeks. On minimally processed food they lost it.

Source: NIH

Heart and mind

A review of studies covering about 10 million people linked high intake to a 50% higher risk of death from heart disease and a 48 to 53% higher risk of anxiety and common mental disorders.

Source: BMJ, 2024

Diabetes risk

The same review found convincing evidence of a 12% higher risk of type 2 diabetes. These are associations, not proof of cause, but they point the same way.

Source: BMJ, 2024

What you gain

The case for vegetables

Linked to a longer life

Each extra 200 g of fruit and vegetables a day was linked to 10% lower risk of death, with benefits continuing up to 800 g a day.

Source: Int J Epidemiology, Aune et al. 2017

Adding beats only cutting

In a year-long trial, people who cut fat and added fruit and vegetables lost more weight than those who only cut fat, and found hunger easier to manage.

Source: AJCN, Ello-Martin et al. 2007

A clear daily target

The WHO recommends at least 400 g, about 5 portions, of fruit and vegetables every day.

Source: WHO

The swap

How to make the swap in Streako

1
Add a Yes / No habit called "No junk food today", every day, with a reminder at 21:00.
2
Add "Eat vegetables" as a Count habit: 3 servings, every day.
3
When you want a snack, eat a portion of vegetables first, such as carrots or cucumber, then decide if you still want the other thing.
4
Check in on both each night. Two streaks, one swap: every day you stay clear is also a day you did something better.

FAQ

Junk food vs vegetables: common questions

Yes. Frozen and tinned vegetables count towards your portions and are often the most convenient way to eat more.

About 80 g: a handful of carrot sticks, three heaped tablespoons of peas or a cereal bowl of salad.

No. Aim to eat less of it, and let vegetables take up more of the plate. Most people find the cravings shrink as the habit grows.

General information, not medical advice. If you are worried about your health, talk to a doctor.

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Swap one habit this week

Drop one, build one, and check in on both each night.

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Junk food vs vegetables: crowd it out, do not fight it

Junk food vs vegetables

The case against junk food

You eat more without trying

Heart and mind

Diabetes risk

The case for vegetables

Linked to a longer life

Adding beats only cutting

A clear daily target

How to make the swap in Streako

Junk food vs vegetables: common questions

Do frozen and tinned vegetables count?

What is a portion?

Do I have to stop eating junk food completely?

More habit swaps

Sugary drinks vs water

Late-night snacking vs sleeping on time

Gaming binges vs exercise

Swap one habit this week