You might have an overactive immune system resulting in allergies, arthritis, gut problems etc et.
Or you might have heath conditions that might weaken your immune system.
What can help to strengthen your immune system response.
You can read about Immunity and Your Immune System and get educated about Immunity.
BUT especially read about Beta Glucans. (Including links to the scientific studies about Beta Glucan

 Constipation is a bowel dysfunction that makes bowel movements infrequent or hard to pass.
Constipation is a bowel dysfunction that makes bowel movements infrequent or hard to pass.