Spinach
Spinach is a rich source of protein, fiber, vitamins, and minerals. It is beneficial for a variety of diseases. Unfortunately, along with the beneficial components, it also contains a lot of oxalates, which promote the formation of kidney stones. If you are prone to this, overconsumption of spinach is not good.

Oranges and Tomatoes
Eating a lot of oranges and tomatoes can cause gastroesophageal reflux, stomach disorders, throat pain, heartburn, and even vomiting. The optimal amount is 2 to 4 oranges and tomatoes per day.

Canned Tuna
Tuna contains large amounts of mercury. Overconsumption of tuna can lead to thyroid problems, vision impairment, hearing disorders, balance and coordination issues, and in extreme cases, muscle weakness. A non-harmful amount is two cans per week.

Soy
Soy has a favorable effect on lowering bad cholesterol and also regulates blood pressure. The downside of soy is that it inhibits the absorption of iron, leading to anemia. It is recommended not to consume more than 200 grams of soy per day, but the problem is that soy is used in hot dogs, desserts, even chewing gum, and it is difficult to avoid.

Cashew Nuts
These are an extremely rich snack with high protein, fiber, essential fatty acids, and selenium. It lowers cholesterol and blood pressure. Unfortunately, too much selenium causes hair loss, brittle nails, dermatitis, neurological problems... It is advisable to eat up to 10 nuts per day.

Water
Hydration is the key to good health, but excessive drinking can also cause water poisoning. Too much water in the body dilutes sodium, and low sodium levels cause brain dysfunction. And how do you know if you are drinking too much water? Your urine is pale, watery in color.