Foods that can harm the bones:

1. Vegetables with high oxalate content: Vegetables like spinach contain oxalates that can combine with calcium and form calcium oxalate, hindering calcium absorption. It is recommended to blanch these vegetables before consuming them to destroy oxalates.

2. Salt: Consuming excessive amounts of salt can lead to the excretion of excess sodium by the kidneys.

For every 1000 milligrams of sodium excreted, 26 milligrams of calcium are lost. This can affect the body's calcium absorption and result in more calcium loss.

3. Fried foods: Fried foods like fried chicken and French fries have high fat content. Consuming these foods excessively can increase the risk of obesity and cardiovascular diseases.

Excess fat in the body is broken down into fatty acids and glycerol during digestion. When saturated fatty acids combine with calcium, insoluble substances are formed, which can affect calcium absorption.

4. Coffee: While coffee can provide an energy boost, compounds like oxalates and caffeine can accelerate urinary calcium loss, hindering calcium absorption.