I felt fine after a month of nothing but potato and a few cheat days. But... it's not just potato. I ate oil too. And spices and vinegar. And a sweet potato

I felt fine after a month of nothing but potato and a few cheat days. But... it's not just potato. I ate oil too. And spices and vinegar. And a sweet potato every few days for variety and B-vitamins. But as far as I can tell you can get almost everything you need nutritionally from potatoes (if you eat the peel). It was boring and awful 3 weeks in, but it totally worked. Happy to share my data if you are curious.