Probiotics are generally considered safe for most people, but like any new addition to your health routine, there is always the potential for side effects. If you are immune compromised, you may want to speak with a healthcare provider before starting probiotics (20). Here are some of the most common side effects (21)…
Stomach Pain
This could include gas or bloat. If you experience this, reduce your daily dose and slowly work your way back up to one full dose daily.
Headaches
If you rely on fermented food as your probiotic source (rather than taking it as a supplement) you may be at risk for headaches. This is because probiotic-rich foods tend to have an ingredient called biogenic amines, which excite the nervous system and trigger head pain in some people (22).
Infections
Infections from probiotics are rare, but there is a risk. This is an especially high risk for people with suppressed immune systems or who have recently undergone surgery (23).
Redness or Swelling
Certain probiotic strains can increase histamine in your digestive tract. This can dilate your blood vessels, which can cause inflammatory reactions like redness, allergies, or swelling (24, 25, 26).
Ingredient Allergies
Some probiotic supplements include common allergens like dairy, soy, yeast, or eggs. Be sure to look at the ingredients listed on the packaging and consult with your doctor if you have any concerns.