Diabetics have a higher incidence of heart disease so a lower fat diet is recommended. Also some studies are showing high fat can increase insulin resistance.

Full cream products can help you gain weight. So go for it.

The question is a little more complicated than a simple yes or no

First off, from a blood sugar point of view, the difference in how much lactose (milk sugar) in milk is NOT dependent on the fat content - so whether it's a glass of skim, 2%, 3.5%, 5,10,18 or 35% the amount of "sugar" in it is almost exactly the same in the 10-15 net carbs in an 8% glass

So for blood sugar only, it makes little difference

And as Margaret notes, heart disease is the leading cause of death in Diabetics (about 80% of us will go out that way) so reducing Saturated Fats is always recommended

But this is where it gets a little more complex because after they finally started looking closely at the "different" saturated fats (long and short chain) they have been unable to find ANY LINK or Increased Risk of Heart Disease from consuming the Saturated Fats in Dairy

"Recent science suggests the link between dairy saturated fat and heart disease is not a simple cause-and-effect; some studies show no link, while others suggest fermented dairy like yogurt and cheese may even protect against cardiovascular disease (CVD)"

This is not a case of them "getting it wrong" it's simply the assumptions were incorrect (like when the cholesterol in eggs was all going to put us in the grave until they finally studied it and found that dietary cholesterol in Food is NOT the cholesterol source for the problem in our blood)

But what is a problem with Diabetics is being overweight or obese and the Extra Calories in more (whole) dairy is significantly higher than the lower fat options so if Weight Management is a challenge then going with a glass of skim milk (at 84 calories and 12 carbs) is better for the waist then 3.5% or homogenized milk (at 160 calories and 13 carbs) where the "whole milk" is Twice as Calorie Dense for the same amount

So like almost everything else with Diabetes it's not a simple Yes/No answer

If you can manage the calories there is zero danger in using regular fat milk and purely from a nutritional perspective

"Drinking whole milk over skim offers advantages including better absorption of fat-soluble vitamins (A, D, E, K), increased satiety to help manage hunger, and potentially better post-workout muscle recovery due to the presence of fat. Full-fat milk contains natural fat and nutrients that can be lost during the processing of skim milk, which is often fortified to compensate."

I am type 2 diabetes and I don't drink nothing but lactose 80 calories milk
I buy the Greek yogurt drinks and I also drink this drink call Goodbelly my diet is going good