Switching from yellow to purple sweet potatoes increases antioxidant content by roughly two-fold. Purple varieties contain higher levels of anthocyanins, which contribute to improved oxidative stress markers. In a budget-friendly plan, a 100-gram serving of purple sweet potato delivers about 20% of the daily value for vitamin A and 10% for potassium, compared to 12% and 8% in yellow. Incorporating purple tubers into weekly menus can boost nutrient density without raising cost, especially when purchased in bulk or on sale.

