Allergens, Fillers, and Common Supplement Additives

By ZYNAVA Editorial TeamReviewed February 2026

Supplement products contain more than just active ingredients. The "Other Ingredients" section of a supplement label lists inactive components used in manufacturing, including fillers to bulk up capsules, binders to hold tablets together, lubricants to prevent ingredients from sticking to machinery, coatings for easier swallowing, and preservatives to extend shelf life. Common additives include magnesium stearate, silicon dioxide, cellulose, rice flour, and various forms of gelatin.

For individuals with food allergies or sensitivities, checking the other ingredients list is essential. Many supplements contain common allergens such as soy, dairy, wheat, shellfish, or tree nuts — either as active ingredients or as processing aids. Gelatin capsules are derived from animal sources and are not suitable for vegetarians or vegans. When using ZYNAVA, compare allergen statements on listings and always verify details on the product label before you buy.

This guide is for educational purposes only and is not medical advice. Always consult a healthcare professional before making supplement decisions. See our full disclaimer and editorial policy.

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