Quora User, lives in Vienna, Austria. You can go the Wienmuseum, Belvedere and the Leopold Museum also has a permanent exhibition of art from the 1900 with Klimt being one the main attractions. And here is a list with all the places where his works can be seen in Austria/Vienna Austria - klimt-foundation.com. , I have lived here 80% of my life.
The prime motivator in taking up protein shakes in your diet is of course to slim down your figure, which exactly why you must put on muscles to do it. Just by training your body (Burning of fat) you can put on muscle to make it easy to maintain you weight over time. So don't sweat it.
Many protein powders have added vitamins and minerals that may lose their potency once the powder has expired. This can be a problem if you're relying on the powder for your daily needs. However, since you shouldn't be using any protein powder that has expired, this should be a moot point.