Experts say you should aim to bolster your immune system no matter the season, and diet is a major way you can do just that. Gut health can contribute to the state of your immune system, Kim Shapira, a dietitian and nutrition therapist, tells CNBC Make It. Shapira recommends these "quick ways to repair your gut" and boost your immunity:Eat foods high in omega-3s including flax seeds, chia seeds, hemp seeds and fatty fishGet diverse servings of fruits and vegetables in your dietTake a good quality probioticAdd fermented foods to your mealsReach for foods high in antioxidants like vitamin A, C, D, E and K (including mushrooms, seeds, asparagus, berries or oranges)Aim to eat whole grains that are high in fiberBut Shapira points out that it's not only what you eat but how you eat it, too. Here are two tips she has for getting the most nutrients from the foods you eat.

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Persons: Kim Shapira, Shapira, chia Organizations: CNBC