Potential Concerns (When Consumed in Extreme Excess)
Weight Gain: Cashews are calorie-dense (about 155 calories per ounce). Eating very large portions frequently without accounting for the calories can contribute to weight gain.

Digestive Issues: Due to their fiber and FODMAP content, overconsumption can cause bloating, gas, or discomfort, especially in individuals with sensitive guts or IBS.

Kidney Stones (For At-Risk Individuals): Cashews contain oxalates. For people with a history of calcium-oxalate kidney stones, very high intake could potentially increase risk.

Allergic Reaction: For the small percentage of people with a tree nut allergy, cashews can cause a severe allergic reaction.

Mineral Interference (Theoretical): Like many nuts and seeds, cashews contain phytic acid, which can slightly reduce the absorption of minerals like iron and zinc if eaten in enormous quantities as a staple food, not as a snack.