What is one single food you can survive on?

The One Food You Could Actually Survive On

Imagine being stranded with only one food to rely on. While no single food contains every nutrient your body needs, a few stand out as surprisingly capable of keeping you alive—potatoes among the most remarkable.

Potatoes are more than just a side dish—they’re packed with vitamin C, potassium, and complex carbohydrates, offering sustained energy. They even contain small amounts of protein and essential amino acids. In fact, there are documented cases of people surviving for months on a potato-only diet, though you’d eventually risk deficiencies in vitamins A, D, and B12 if it went on too long.

Rice, especially white rice, is a survival staple around the world thanks to its long shelf life and calorie density. But while it fuels populations, it lacks protein and key nutrients unless paired with something else—like beans. And beans, rich in protein and fiber, are a nutritional powerhouse. When combined with rice, they form a complete protein, making the duo a classic in survival planning.

Other options? Eggs come remarkably close to being a perfect food—packed with high-quality protein, healthy fats, and nearly all essential nutrients. If you had a reliable source, eggs could sustain you longer than most single foods. Milk, though nutrient-rich, doesn’t store well and can cause issues for many adults. Trail mix offers calories but lacks balance. Seaweed? Surprisingly nutritious, especially in iodine and minerals, but not enough to live on alone.

Still, if you had to pick one food to survive on with some hope of long-term health, the humble potato might just be your best bet—especially if you can supplement it occasionally. In the end, diversity wins. But in a pinch? The potato proves not all heroes wear capes—some just grow underground.