If you have celiac disease and need to avoid any cross-contamination, it may be best to skip out on Starbucks unless you’re ordering something based on black coffee or espresso. Starbucks officially states: “We cannot guarantee that any of our products are free from allergens (including dairy, eggs, soy, tree nuts, wheat, and others) as we use shared equipment to store, prepare and serve them." Ultimately, it’s up to the individual to weigh the cross-contamination risk factor.