Certain vitamins and nutritional supplements, particularly Vitamin B3 (nicotinamide), may support optic nerve health and retinal cell function in glaucoma patients.Vitamins and nutrients studied for glaucoma support include:Key Vitamins and SupplementsVitamin B3 (Nicotinamide): Research shows that nicotinamide (a form of vitamin B3) supports cell mitochondria and may improve visual fields or protect retinal ganglion cells from damage. High doses can carry risks, so consult an eye doctor before taking large supplements.Coenzyme Q10 (CoQ10): Often combined with citicoline, CoQ10 supports cellular energy production (mitochondria) and helps defend sensitive retinal cells against oxidative stress.Vitamin A: Supports overall corneal health and may help inhibit oxidative stress linked to glaucoma progression.Antioxidants (Vitamins C and E): Help protect cells and ocular blood vessels from oxidative damage, though oral supplements do not directly replace standard pressure-lowering drops.Omega-3 Fatty Acids: Support healthy blood flow and reduce systemic inflammation.Dietary SourcesLeafy Greens: Spinach, kale, and collard greens supply lutein, zeaxanthin, and dietary nitrates that promote healthy blood flow to the optic nerve.B3-Rich Foods: Fish, poultry, eggs, nuts, and whole grains naturally boost nicotinamide and niacin levels safely.Citrus and Berries: Oranges and blueberries provide vitamin C and flavonoids for antioxidant support.Note: Vitamins and supplements do not cure glaucoma or replace prescribed intraocular pressure-lowering treatments (such as eye drops). Always speak with your ophthalmologist before starting any new supplement.