What single food could you live off the longest?

The Ultimate Survival Food: The Humble White Potato

If you were stranded and could only choose one single food to survive on, the white potato would be your best bet. Nutritionists frequently highlight this versatile tuber as the top choice for long-term survival, and history strongly backs up that claim.

Throughout history, entire populations—most notably in 19th-century Ireland—have sustained themselves almost exclusively on potatoes for extended periods. What makes the potato so impressive is its surprisingly complete nutritional profile. Packed with complex carbohydrates for sustained energy, essential nutrients like Vitamin C and potassium, and even a respectable amount of quality protein, it provides almost everything the human body needs to function.

While living on a single food indefinitely isn't ideal for long-term health—potatoes lack adequate amounts of vitamins A, D, and calcium—adding just a small amount of dairy, like butter or milk, bridges nearly all of those nutritional gaps. For basic sustenance, the humble spud remains nature's ultimate survival package.