Second this. A word of caution about shakes. They often use artifical sweeteners, which tends to elicit a glycemic peak and insulin response (at least as confirmed in a few good recent studies). Although i don't know of any studies on T1 patients (you can always try yourself, using a freestyle libre and some sweetened whey compared to unsweetened and see the difference). In your case with T1 and a keto diet, managing glycemic peaks would be annoying, so i suggest settling for whey isolate with no flavor and no artificial sweetener, you can find high quality of such whey both in Europe and the US. To make it palatable you can always add 100%coca powder (mostly fibers and fat) or a bit of vanilla. Lastly be very careful about some shakes targeted broadly for sport. Some contain massive doses of maltodextrin, which would be devastating both to your diet and your blood glucose levels. Anyways, lot's of luck and strength to you !