2021 health trends: What’s in, what’s out Published: Tags: What will be the biggest health trends of 2021? The Better Health Market & Café in Michigan, which has 14 locations statewide, has the answers: 2021 health trends are sensible lifestyles focusing on immunity and wellness. Here’s what in and what’s out for health trends in 2021: What’s in: Immunity Lifestyles – Boosting immunity is good for metabolism and health. Organic foods of citrus fruits, greens, garlic, ginger, nuts and vitamins of D, C , Zinc, Elderberry and Melatonin aimed at reducing the toxic load in the body from food pesticides – it means our systems can instead focus on other foreign invaders, like building immunity.