Carb free diet?

My fault. Hard to discern motivation at times, especially with the IIFYM comment you made before. So, please accept my apologies.

To answer your question, the answer is no, though it's not uncommon to see strict carb restriction in bodybuilders as part of stage prep.

I mean, processed carbs such as pizza etc. I don't mean carbs in general.

The answer is still no.

I don't really see how a diet can be carb free? I mean, fruits and veggies all have carbs. Can someone enlighten me?

Personally, I like my carbs. For an active lifestyle I need healthy carbs (unhealthy carbs make me exhausted), and I love every moment of them

So carb free would entail eating no vegetables or carbs.

Practically, it's rare that any diet that one could actually eat would be completely carb free, as things like cheese and whatnot have small amounts of carbs, but theoretically, one could subsist on a diet of completely fat and protein if necessary.

why does your husband want to do a keto diet?

A lower carb intake can be beneficial if you are insulin resistant, otherwise just focus on getting enough P&F and stick to a calorie deficit and live a much more relaxed life where you don't have to avoid food groups.

I don't think that avoiding a certain food group automatically causes your inference that the person doesn't live a relaxed life -- any more so than those who continuously wonder whether or not something will bump them over in calories, at least.

because the OP was wondering how her husband would be able to survive in normal life circumstances where he would otherwise be able to pick any readily available food that fits in his cal target and not have to ask for a burger with no buns.

And yes, P&F are the required macronutrients but carbs are the preferential energy source and anyone who is exercising (I hope everyone who can) should be eating an appropriate amount of carbs to fuel this. (Yes, gluconeogenesis is real but not optimal in hard training athletes)

And yes, I've done cyclical keto diets before. Gym time is about survival not about making progress forward.

Your second and third paragraph are not responsive -- or, at least, are responding to something other than what I said.

There's this often repeated comment here that restricting carbs somehow denotes a poor relationship with food, or that it's some sort of horribly restrictive philosophy that causes people to be constantly on edge with regard to their food choices. For some people, that may be true -- and OP may be one of those -- however, many people that do low carb find it exactly the opposite. They went from writing down everything they ate, tracking calories, fat, etc., to eating when they're hungry, not tracking much, if anything, and enjoying their meals.

It's not a one-size fits all situation, specifically with regard to the "relaxed life" issue, and it's highly YMMV.

Practically, it's rare that any diet that one could actually eat would be completely carb free, as things like cheese and whatnot have small amounts of carbs, but theoretically, one could subsist on a diet of completely fat and protein if necessary.

2nd paragraph was relating to this. Couldn't be bothered double quoting

3rd paragraph was just letting you know that I've been there and done that.

Ah, sorry -- the quoting confused me. For what it's worth, absent metabolic issues, I don't disagree with what you wrote. I just wanted to address specifically the "relaxed life" comment that was made.