Does dietary fat get broken down into ketones, too?

Yes.

Dietary fat is broken down into long-chain fatty acids in the small intestine. They're then absorbed into the bloodstream and transported to the liver, where they are further processed into ketones, short-chain fatty acids and other compounds. Your body fat is broken down to fatty acids also... these too must be transported to the liver for further processing into ketones. Your liver has no way of knowing whether the fatty acids came from food or your fat cells, it just processes 'em!

However, not to worry ... if you're eating low carbs then eating fat won't make the burning of body fat stop .. in fact, it can and will speed it up. For an explanation of what becomes of your body fat and the fat you eat ... read this post.

Doreen