This combined with Opti-Greens 50 drank nightly has helped my overall immune health, and gut health. I do not get sick every few months like I used to, even working in a hospital and in a schools. If I forget to take this for a few days, I definitely notice I feel less energized. I feel that the quality and variety of superfoods in this Opti-Reds 50 give my immune system a boost and I love having it with cranberry juice or in a smoothie!