When you eat a raw red bell pepper or a kiwi, you’re giving your body the raw materials to build strong, resilient venous walls. But Vitamin C does more than just build; it also protects. Your arteries are under constant attack from free radicals, which damage the delicate inner lining called the endothelium. Vitamin C acts as a powerful antioxidant, a shield that protects this lining from daily oxidative stress. So, adding broccoli (steamed for just a few minutes) to your meal not only strengthens the structure of your veins but also defends them from damage. The best sources are often surprising: just half a cup of raw red bell pepper contains more Vitamin C than three oranges.