For most people, one or two of these meals a week, kept to a single meal rather than a whole day of them, is a workable frequency. Not a rule handed down from anywhere, but the practical answer: pizza, pasta, burgers and fried chicken are high-insulin-load meals, and having them once or twice in a week leaves five or six days of eating that pull in the other direction. What tends to go wrong is not the Friday pizza. It is the Tuesday that quietly looks like the Friday.

This is the question people actually send us, in their own words: "How often is it okay to have these sort of meals like pizza, pasta, burgers and fried chicken." Nobody is asking whether pizza is healthy. They already know the answer to that one. They are asking how to have a life.

Why is "never" the wrong answer?

Because it does not hold, and the collapse costs more than the pizza did. Research on long-term eating habits suggests that flexible, forgiving control tends to predict better maintenance over time than rigid control, where one broken rule becomes a reason to abandon the whole structure (Westenhoefer et al., 2013). Rigid eaters do brilliantly until the work party. Flexible eaters plan for the work party.

That is the reasoning behind 80/20, one of the seven hacks: eat the way you intend to roughly eight times out of ten, and spend the other two deliberately. Two planned high-load meals a week is a budget you can actually keep. Zero is a budget you will break, and then stop tracking altogether.

What matters more than frequency?

What the other five or six days look like. In a controlled inpatient trial, people eating ultra-processed food ate noticeably more each day than when they ate minimally processed food, even though the two diets were matched for nutrients, and they did not report feeling any more full on it (Hall et al., 2019). Processing level is one of the things the Insulin Fix Score weighs, alongside glycemic load, protein, fibre, fat quality, liquid calories and food order, on a 0 to 100 scale where a higher score means a lower insulin load.

So the person having one real pizza on Saturday and cooking the rest of the week is in a completely different position from the person having no pizza at all but eating packaged sandwiches, cereal bars and sweetened coffee drinks Monday to Friday. The second person never has a cheat meal and never gets a break from the insulin load either. Fix the background first. Then the pizza is a rounding error.

Does it matter how I eat the pizza, not just how often?

It matters a lot, and this is the highest-leverage thing on the page. When people ate vegetables and protein before the carbohydrate portion of a meal rather than starting with the carbs, the post-meal glucose and insulin rises were sharply blunted compared with eating the carbs first (Shukla et al., 2015). Same food. Same meal. Different order.

In practice, for these specific meals:

A reader put the other half of this well: "great to know when I eat out and there is no way to avoid food that includes carbs." You are not avoiding them. You are sequencing them.

But what about my version of this?

Your pizza is not a generic pizza. Thin crust with chicken and rocket and a salad first is a different number from a stuffed-crust meat feast with a regular soda. Type the meal into the Insulin Fix Scanner in one line, the way you would say it out loud, or photograph the plate if that is quicker. You get a score back on that 0 to 100 scale, higher being the lower insulin load, plus the single change worth making to this meal. Scoring a meal is free and needs no account. The useful habit is scoring the version you were going to eat anyway, then scoring the adjusted version, so you can see what sequencing and a drink swap are actually worth before you commit to them.

Does walking after the meal help?

It appears to. In people with type 2 diabetes, a short walk of about ten minutes after eating lowered the post-meal glucose rise meaningfully compared with not walking (Reynolds et al., 2016). Ten minutes is the walk to the car plus a lap of the block. It is the cheapest thing on this list and the one people skip.

Stack it: salad or protein first, carbs last, walk after. Three changes that cost you nothing and leave the meal intact.

How do I spend my two meals well?

Pick the version of the food you actually want. A proper pizza from a real oven, eaten slowly, sitting down, counts as one of your two. A sad petrol station sandwich eaten over the sink is also a high-load meal, and it buys you nothing. If you are going to spend the budget, spend it on something worth eating.

Two other things that cost nothing. Drink water rather than soda, because liquid sugar pushes the score down hard and does little for fullness. And order the smaller size when there is one, because the smaller box is less food and no willpower is involved once it is not in front of you.

Frequently asked questions

Is one pizza night a week better than a slice most days?
Generally yes. One contained high-load meal leaves the rest of the week low-load. A slice most days means there is no day where your insulin load is actually low, which is the thing you were trying to create.

Does 80/20 mean 20 percent of meals or 20 percent of days?
Meals. Twenty percent of roughly 21 meals a week is about four, so two genuinely high-load restaurant meals plus a couple of relaxed ones fits comfortably. A whole cheat day is closer to three or four meals in a row, which is a different thing.

I eat out three or four times a week for work. Is that too often?
Eating out is not the problem. Eating out as though every meal is the pizza meal is. Most menus have a version that scores far better than the default: grilled rather than breaded, salad or vegetables arriving first, sauce on the side, water rather than a soft drink. Score two or three of your regular orders once and you will know which restaurants are safe without thinking about it again.

Does one high-load meal undo a good week?
No. One meal is one meal. The response that does damage is the one where a single pizza becomes evidence that the week is ruined, so the next four meals go the same way. That is exactly the pattern flexible eating is meant to interrupt.