Probiotics: Some research suggests that certain probiotic strains might have a potential role in modulating the immune system and reducing allergy symptoms. Probiotics such as Lactobacillus rhamnosus, Lactobacillus acidophilus, and Bifidobacterium lactis have been investigated for their potential to regulate the immune response and decrease the severity of allergic rhinitis symptoms. However, results from studies have been mixed, and more research is needed to determine their efficacy.

Vitamin C: Vitamin C, known for its antioxidant properties, has been explored for its potential to reduce allergy symptoms. Some studies suggest that vitamin C may have a mild antihistamine effect and could potentially alleviate symptoms like nasal congestion and sneezing in some individuals with allergic rhinitis.

Quercetin: Quercetin is a flavonoid found in certain fruits, vegetables, and supplements. It has anti-inflammatory and antioxidant properties and has been studied for its potential to inhibit the release of histamines, which are involved in allergic reactions. While some individuals report symptom improvement with quercetin supplements, scientific evidence supporting its effectiveness for allergic rhinitis is limited.

Butterbur (Petasites hybridus): Butterbur is an herbal supplement that has been studied for its potential to alleviate allergy symptoms. Some research suggests that butterbur extracts may have antihistamine and anti-inflammatory properties, which could potentially help in reducing symptoms like sneezing and nasal congestion. However, the use of butterbur should be done cautiously, as raw butterbur contains compounds that can be toxic.

Probiotic-rich Foods: Incorporating probiotic-rich foods into the diet, such as yogurt, kefir, sauerkraut, and kimchi, might positively influence the gut microbiota and indirectly affect immune responses. However, their direct impact on allergic rhinitis symptoms is not well-established.