[toomuchtodo]

Heavy whipping cream or butter in coffee isn’t bad on a keto diet.

[PragmaticPulp]

Ketogenic diets used in epilepsy go far beyond a bit of heavy whipping cream in your morning coffee.

A classic ketogenic diet would require significant quantities of heavy whipping cream (or MCT oil or other oils) with every meal, including snacks. Wikipedia has a good example: https://en.wikipedia.org/wiki/Ketogenic_diet#Classic

Doing a true ketogenic diet is hard work. Most of what people call ketogenic diets are actually more like Atkins or low-carb. Going into full ketosis requires significant protein restriction and augmenting with significant fat sources.

[amanaplanacanal]

What do you consider “full ketosis?” Is that defined somewhere?

[toomuchtodo]

There are test strips available to indicate your ketone levels. You're in ketosis once your blood ketone levels are at or above 0.5 mmol/L.