Serendipity has lots of teas, protein shakes and drinks. I asked about the protein powder and they have several that are gluten free and peanut free. When I mentioned I had allergies they cleaned out a blender and used new utensils to make/mix my protein shake.
The owner is really knowledgeable and answered every question I had. She asked me how severe my allergies are, which is a first, nobodies ever asked how severe my allergies are after I asked about specific ingredients and told me about which protein powders would be safe and which drinks/shakes to stay away from.
I don't believe the GF items are marked on the menu but they have a few signs inside that say "Gluten Free" or "Not Gluten Free" on stuff like cake pops.
— Very
— Gluten-free items are marked on the main menu
— Some
— Excellent