Probiotics may also help to improve mental health by reducing anxiety and depression. They may do this by increasing the production of serotonin, a neurotransmitter that plays a role in mood regulation. Protection against allergies: Probiotics may help to protect against allergies by increasing the production of antibodies and helping to reduce inflammation. Improved skin health: Probiotics may also help to improve skin health by reducing inflammation and increasing the production of collagen. This may be beneficial for people with conditions such as acne, eczema, and psoriasis.