Potatoes; Not the answer you wanted:

Protein quality: Potatoes have a low protein content (1–1.5% of fresh weight), but the quality of potato protein is very good. The biological value of potato protein is between 90 and 100, which is higher than that of soybeans (84) and legumes (73).

Legumes contain high amounts of lectins. Peanuts are legumes.

• Digestive Issues: Active legume lectins can bind to the cells lining the digestive tract, potentially disrupting the breakdown and absorption of nutrients. This interference with normal digestive processes may result in bloating, gas, stomach upset, and diarrhea.

• Mineral Absorption Interference: Legume lectins have been found to interfere with the absorption of essential minerals such as calcium, iron, phosphorus, and zinc. This interference can prevent the body from effectively utilizing these important nutrients.

• Autoimmune Response: Prolonged exposure to lectins that bind to cells for extended periods may trigger an autoimmune response in some individuals. This immune system reaction could potentially contribute to inflammatory conditions like rheumatoid arthritis and type 1 diabetes.

• Malnutrition Risk: In cases where legume lectins hinder the absorption of vital nutrients like minerals or disrupt normal digestion, there is a risk of malnutrition over time if these effects are not addressed or compensated for through dietary adjustments.

• Gastrointestinal Discomfort: Consumption of high levels of active legume lectins, especially from raw or undercooked legumes, can cause gastrointestinal discomfort such as nausea, vomiting, and abdominal pain.

• Inflammatory Conditions: While not conclusively proven in scientific studies yet, some theories suggest that lectins may play a role in promoting inflammation within the body, potentially contributing to chronic inflammatory conditions.

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https://www.goodhousekeeping.com/health/diet-nutrition/news/a39697/penn-jillette-weight-loss-potato-diet/