The guidelines say:

That saturated fat should be avoided.

No Research Verifies That:

There was no randomised control trial to demonstrate that in 1977.

All attempts to show body harm, or heart disease risk from saturated fats. in the last 40 years, have failed to find that evidence.

The Women's Health Initiative should be the end of it. "There are no health benefits" in the low fat diet.

The Science Suggests:

That a Mediterranean diet, or a low carbohydrate diet should be tried.

To do anything else is to go beyond where the science currently is.

However, many of us after reading and talking and experimenting a bit, might decide to do a little more than that. The Banting Diet for instance.

Of course you should discuss this with your doctor or your dietician. Keep good records and find your own way forward.

Butter is a Good Fat:

Time Magazine in 2015

What Other Dietary Recommendations do they Mean?

The evidence "does not support" is clearly saying there are better options.

The most tested option is the Mediterranean diet.

Vegetarian diets are commonly attempted. (But never recommended by scientists.)

High protein diets are sometimes tried. (Not recommended by scientists again.)

Low carbohydrate diets are recommended by the Swedish Experts Committee, 50gm a day. The Cochrane Group, does not go that far. They suggest less that 130gm of carbohydrate a day, (which is NOT low carbohydrate). Although that level of carbohydrate will help you lose weight, it will prevent ketosis.

Very low carbohydrate diets are suggested by many of the new studies being done in the last 10 years, especially for people with type two diabetes or metabolic syndrome. The cautious people, like the Cochrane Group, think we're not there yet.