Absolutely Amazing I love Vital Proteins Vitality Immune Booster stick packs! They boost the immune system and provide collagen! Vital Proteins Vitality Immune Booster is now available at all Walgreens stores nationwide! They are available in Clementine and Grape Citrus! These are great for when I'm on the go! They are delicious and nutritious! Just add to water, stir, and enjoy!