Melanin production can increase over time to better protect you from sun exposure. In order to do this, you need to be eating the right foods that provide your body with nutrients used to make melanin.

When your goal is to gain weight, peanut butter is an inexpensive source of high-quality calories. Use it to add nutrition and calories to snacks and meals.

When you're trying to gain weight -- whether it's to avoid the health risks of being underweight or for aesthetic reasons -- your eating habits can make or break your results.

When children don't eat enough calories, they fail to thrive energetically and physically. They may not meet growth markers, and if they have a serious illness, they may have trouble bolstering their immune system and living a healthy lifestyle.

Visit any supplement or health food store, and you'll find hundreds of products designed to help you gain weight. But these products aren't essential for weight gain -- you can get the calories and nutrients you need to put on weight healthfully from the same foods that likely already make up your healthy diet.

Whether you're a vegetarian, vegan or flexitarian, the basics of weight gain stay the same -- you need to consume more calories than you burn to put on weight.

The key to gaining weight is consistently eating more calories than your body uses. While raw eggs provide some calories, lots of other healthy foods contain more calories per serving, so simply drinking raw eggs may not be the best way to gain weight.

Some bodybuilders achieve muscle growth by bulking -- increasing weight and presumably -- muscle by overeating. They then "cut" when going into the competition season by prioritizing fat loss and maintaining any muscle the bulking helped them build.

A child who is underweight due to a chronic medical condition, genetics, poor appetite or picky eating habits is at risk of low energy and illness. Your child's doctor can help you determine whether she needs to gain weight.

Eat too many calories from any food, and you will gain weight. But since cucumbers are extremely low in calories, you'd have to consume several dozen of them to make a significant impact on your size.

Nausea is a common problem with a wide range of causes, most of them fairly minor. Nausea often leaves you with an urge to vomit -- and it sometimes makes you wish you could.

Getting bigger shoulders takes work, in and out of the gym. Training at home is a slight obstacle, but this doesn't mean it cannot be overcome. Your best bet is to invest in a set of strong resistance bands with handles. These make good, affordable home tools that can be used to work any part of your body.