No matter how much one cries, one can simply not run out of tears. According to science, a person can produce as much as 15 to 30 gallons of tears every year. When it comes to structures, tears are similar to saliva. Both are mostly made of water. But aside from water, tears also contain salt and fatty oils. One amazing fact is that tears also contain more than 1500 varying proteins. Tears have electrolytes as well. These include elements like sodium. One can attest that tears are salty. The sodium element gives tears their salty taste. Aside from sodium, tears also contain bicarbonate, potassium, as well as chloride. Although at lower levels, tears also contain magnesium and calcium. Tears also have three distinct layers. These are the mucous, the aqueous, and the oily layers. The mucous layer is responsible for making sure the tear attaches itself to the eye. The thickest layer is the aqueous layer. It is the one responsible for hydrating the eyes. It also keeps the eyes free from bacteria. Its most important role in protecting the cornea. Finally, the oily layer prevents the other layers from evaporating. It is also responsible for keeping the tear’s surface smooth. This is the reason why despite bouts of crying, one can still clearly see his surroundings. Conclusion: As discussed, crying can burn calories. The calories burned are the same as the amount burned when laughing. There are calories burned when crying. The amount, though, is not significant to result in weight loss. No matter the amount of tears shed, one will not lose a lot of weight. When aiming to lose weight, one can workout instead of cry. But while it cannot make one lose a lot of weight, crying has other benefits. A good cry can be a stress reliever. But if one cries more often than the others, it may be time to speak with a medical expert. This is to find out if one suffers from depression or any other mood-related disorder.