Is energy need less on keto diet?

resander said:

I am learning, experimenting, moving towards a ketodiet... For example:

breakfast 1hiloslice+2hamslices+cheeseslice+2frankfurters
carb 5+1.6+0+1.4=8 kcal 90+100+100+200=490
morningsnack 20gGreekStyleYogurt+50graspberries
carb 2+2=4 kcal 25+5=30
lunch 2quarterpunders+cheesetopping+2poachedeggs
carb 0.4 kcal 342+100+150=492
dinner 80gpotatoes+Japanesemeatcurry
carb 12+2=14 kcal 50+250=300
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Carbs 26 kcal 1312

My daily energy requirement to maintain weight: 1700kcal approx
Energy shortage: 400kcal (been about the same for other experimental day menus too)

I can top up to reach 1700kcal, by coffee+doublecream. Is that necessary, or is the energy need less while on a ketodiet?
(Dr Eric Berg says it is in 'Dr. Berg's Healthy Keto Basics')

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Not a Berg or potato fan.. can't you have something else like cauliflower or broccoli? Most people on a ketogenic way of eating wouldn't touch potato or for that matter bread..

Energy intake can be less when in nutritional ketosis because the body is able to readily switch to mobilising stored energy when dietary energy is depleted. Even very slim people have many thousands of stored calories waiting to be used. The problem for many is that those calories cannot be easily accessed, owning to almost permanently elevated blood insulin concentrations.

If you are on a well formulated ketogenic dietary plan then you can comfortably ingest significantly less energy than you expend without hunger. This is why it’s such a successful diet for rapid loss of body fat

In that case just eat fat/protein to satiety and ignore calories. Your body will maintain weight all on its own when it’s happy.

So is this what you are eating or what you intend to eat?
In your shoes I'd be skipping the breakfast and morning snack and eating more for the other two meals. I found intermittent fasting and keto a very powerful regime.

resander said:

Sausages like frankfurters, bockwursts and hot dogs are all processed, contain preservatives and are usually smoked.
OK for keto?

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I try to get very high meat low carbohydrate versions. Not sure where you are located.. but I get something like these

https://www.waitrose.com/ecom/products/meica-6-frankfurters/069117-35055-35056

0.5g carb per 100g so negligible.. and I have no prob with those remaining in ketosis.

resander said:

...Sausages like frankfurters, bockwursts and hot dogs are all processed, contain preservatives and are usually smoked.
OK for keto?

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When you are trying to get healthy, reducing insults as much as you can will help. Adding chemicals and unhealthy fats and proteins are not going to help. Also, many processed meats contain a surprising amount of sugar often hidden in innocent sounding names. Japanese meat curry, depending on how you make it or buy it can contain surprisingly large amounts of sugar, so please check the ingredients.

Try some grass fed organic beef, or chicken instead. Another easy and healthy way to add some calories is to have some nuts and seeds. For an afternoon snack I will often have a few spoons of hemp seeds and a handful of nuts. Also increasing your non-starch vegetable variety and quantity will help.

What are you drinking? I cut out everything except water, tea and coffee, which again helps cut out unnecessary sugars and carbs.

Look into intermittent fasting as bulkbiker mentioned. Try to eat all your food in a 10-12 hour window during the day, which will also help produce ketones.

Ketogenic diet should not equate unhealthy, quite the opposite. Have a look at Mark Sisson and his primal blueprint information.