Short answer: Derived from sweet oranges, containing bioflavonoids and antioxidants that support the body's natural defense systems — Citrus Sinensis Extract's specific, stated role.
Why sweet orange extract is included alongside other antioxidants
Bioflavonoids from citrus sources contribute a genuinely different antioxidant compound class than the formula's marine (Fucoxanthin/Fucoidan) or botanical (Saffron, Oleuropein) sources.
Why "natural defense systems" is a broad, honest framing
This phrasing reflects a general, supportive antioxidant contribution rather than a specific, targeted medical claim.
💡 Worth knowing: this rounds out the formula's antioxidant coverage across land-plant, citrus, and marine sources — a genuinely broad-spectrum approach.