NanoDefense Pro is formulated with natural and innovative ingredients, with no harsh or synthetic substances that could cause side effects. The nanotechnology used ensures efficient absorption without overloading the body. However, it’s important for individuals with allergies to review the full ingredient list before use. In general, NanoDefense Pro is safe, and side effects are extremely rare. As a precaution, always consult a doctor before starting any supplement, especially if you have pre-existing conditions.