Has anybody used frozen yogurt in a protein shake? Never done it but looking to spice it up.

If by "frozen yogurt" you mean plain (unsweetened) yogurt (greek or otherwise), I'd think that would be doable. If by "frozen yogurt" you mean something that comes in a container in the frozen food section of your grocery store, I'd say it's unlikely you'll find an option that's not far too high in sugar to be a good choice.

I've made my own "soft serve"-like concoction, using a small blender, almond milk, ice, and Protein powder. I don't usually use yogurt because it gives the whole thing a tangy-ness I don't care for, but it would thicken it up. That's not always a good thing when you're really early post-op, though. Thicker shakes can be harder to get through your tiny sleeve in the first weeks when you're still swollen and healing.

There are practically NO yogurts beside the plain unsweetened that would be appropriate to use post op. They all contain too many carbs and sugar. The plain greek yogurt is allowed but i find it to be more on the sour side like sour creme. I had to add Stevia to it and sugar free Jello to be able to eat it. The only one I could find that was not so high in Carbs was the Light and Fit brand of Greek Yoghurt by Dannon but not the one in the big containers but the individual containers or i serving size has about 7 grams of Carbs. I tried the strawberry and the vanilla is excellent. You could add flavorings in the mixture when you blend it. I'd add just a little milk to it but not too much to make it watery then freeze it. Take it out of the freezer after frozen then let it thaw just a bit to be able to get it out of the carton then put in blender and whip it up. It does taste good like frozen youghurt.... You WON'T find ANY ready made frozen yoghurt that is Not hight in sugar and carbs. I guess you could try the plain regular low fat yoghurt and it wouldn't be as sour and add your own sugar free flavors to it. Check online for the NOW brands of little bottles of all sorts of flavorings to add to anything and it's all low carb and low calorie and sweetened with stevia only. I am going to order some from the i herb website for natural foods. they come inall sorts of interesting flavors like pineapple, orange, strawberry, mango, blueberry, blackberry etc..... Enjoy!!!!

Has anybody used frozen yogurt in a protein shake? Never done it but looking to spice it up.

I have not tried it in a protein shake but I bet it would be good. I have been eating frozen yogurt YES the kind with "how dare I" sugar since about 2 months out. Some of them have a fair amount of protein in them and is a better choice than ice cream.....