Keto made easy

Why Do Most Diets Fail? Adherence, Not the Macros

Quick answer: Most diets fail because people stop doing them, not because the macros were wrong. When researchers put diets head to head for a year or more, the results end close to a tie. The diet that wins for you is the one you can keep doing without running on willpower, and the best way to find it is to make the rules as few as possible.

In this article

What the head-to-head trials show

If one diet were dramatically better than the others, the long trials would show it. They don't. Low-carb sometimes leads early, and then the gap narrows. The full numbers are in What the research says below, but the short version is that after a year, differences between well-run diets are a few pounds at most.

One detail keeps coming up: dropouts. In one of the classic low-carb trials, retention was low in both groups (Foster et al., 2003). People leaving the diet is not a side note. It's the main finding.

Calories still count, so why the tie?

KetoDick doesn't pretend calories don't matter. He accepts that "calories in, calories out" and "eat less, move more" are mostly true (video 9AGpKAfs3Yk). His point is that knowing this has never been the hard part.

The hard part is eating less without feeling terrible. That's why most diets work on paper and fail in the kitchen: they all create a deficit, and most of them make you hungry while they do it. When the diets are equal on paper, the tie-breaker is how long you can stand them.

He puts it plainly in his 2018 basics: most diets work if you stay on them, and extra steps make staying on them harder (video UygKGoP_BtA). See energy balance.

Willpower is a bad engine

Willpower runs out. It runs out faster when you're tired, stressed, or it's late and the kids finally went to bed. A diet that only works on your best days is a diet that only works some days.

His case for keto is built exactly here. Cutting carbs lowers insulin, which he calls a main hormonal driver of hunger, so people can eat less without relying on willpower (video 9AGpKAfs3Yk). He calls this keto's real advantage: adherence, not a metabolic trick. That's a different claim from a metabolic advantage, and the difference matters.

Every rule is extra work

Here's the part most diet books get backwards. They add rules: cut dairy, buy this oil, count this, time that. Every rule feels like progress the day you add it.

He argues the opposite. Any restriction you add, such as cutting dairy or counting calories, is extra work, and extra work affects how likely you are to keep going (video LbPnm9T0oxc). In his words from the 2018 basics, the harm is in diet adherence: the more complicated we make this, the less likely you are to stay with it (video UygKGoP_BtA).

So what you do is count the rules you're following and ask, for each, "what is this one for?" If you can't answer, drop it for now. You can always add it back.

What this means for keto

Keto isn't immune. It fails the same way every other diet does, when it gets too complicated or too hungry to keep up.

If you take medication for diabetes or blood pressure, cutting carbs can change what you need. He says anyone on medication should review the plan with their doctor, especially the dosing (video UygKGoP_BtA).

What the research says

When food is controlled in a metabolic ward, so adherence is taken off the table, the differences are small. Cutting fat lost more body fat per day than cutting carbs, 89 vs 53 g/day, in 19 adults (Hall et al., 2015). Switching 17 men to keto at the same calories raised energy expenditure by 57 kcal a day (Hall et al., 2016). More in Kevin Hall's metabolic ward studies.

Put together: under lock and key, the macros barely matter. In real life, what people actually keep eating decides it. Where keto helps, the likeliest route is appetite. Protein is part of that: raising it to 30% of energy cut intake by 441 kcal a day in one small trial (Weigle et al., 2005).

KetoDick's take

I've said keto's real advantage is adherence, not a metabolic trick. The practical question isn't whether calories count. It's how to lose weight comfortably, and my answer is controlling insulin through carbs (video 9AGpKAfs3Yk).

And I keep it simple on purpose. Most diets work if people adhere to them; anything you add is extra work (video LbPnm9T0oxc).

Key takeaways