A very informed question Alex, but i’m afraid the answer is a little unclear in many respects, certainly form a total health pov. Firstly although a ‘ketosis’ styled diet is VERY (and I mean very) difficult to follow and actually induce a state of ketosis, you state ‘approach’ which is good, you obviously are aware that hitting ketosis and monitoring using keto sticks to measure blood is a challenge.
However if we assume a low carb diet is what most are following then we would of course suggest one avoids trans fats, particularly man made varieties such as hydrogenated fats found in crisps, choc etc etc.
This leaves the cold pressed options such as coconut oil, avocado and its oil, grass fed butter and beef, organic nut butters and the likes of. Of course, we know that nutrition is ever evolving and consequently any amounts of fat in your diet at your own discretion.
Remember any high fat and protein diet should be alongside plenty of green leafy veg by design, take the lion eating the antelope, the lion ingests ALL of the antelope including the stomach and intestines meaning inherently they consume meat, fat as well as plant based foods. So if nature is anything to go by it is crucial we get the veg in alongside a high protein and fat diet.
Off on a slight tangent there sorry.
An interesting topic for convo for sure.