It's Friday night. Your friends are ordering pizza. You've been strict on keto all week and you're feeling good — but also really, really want a slice.

So the question forms: 'Can I just have a cheat day? Would one day really undo everything?'

It's one of the most common questions in the keto community — and the answer is more nuanced than a simple yes or no. What actually happens when you eat carbs on keto depends on several factors: how long you've been keto, how much you eat, what you eat, how fat-adapted you are, and what your goals are.

One of the most appealing things people hear about keto is: 'You don't have to count calories.'

After years of obsessively tracking every bite, weighing portions and feeling guilty about going 50 calories over your daily target — the idea of just eating real food until you're full and losing weight anyway sounds almost too good to be true.

So is it? Do you actually have to count calories on keto? Or can you genuinely eat to satiety and let the diet do the work?

Ask someone why they haven't tried keto yet, and one of the most common answers is: 'It's too expensive.'

And honestly? It's not an unreasonable assumption. Instagram keto influencers eating grass-fed ribeye with truffle butter, drinking MCT oil lattes and ordering organic avocados by the case don't exactly paint a picture of an accessible lifestyle.