The 6 healthiest foods on the Planet

#1 Lemons
Just one lemon has more than 100 percent of your daily intake of vitamin C, whick may help increase "good" HDL cholesterol levels and strengthen bones. Citrus flavonoids found in lemons may help inhibit the growth of cancer cells and act as an anti-inflammatory.

#2 Broccoli

One medium stalk of broccoli contains more than 100 percent of your daily vitman K requirement and almost 200 percent of your recommended daily dose of vitamin C, two essential bone-building nutrients. The same serving also helps stave off numerous cancers.

#3 Dark Chocolate 

Just one-fourth of an ounce daily can reduce blood pressure in otherwise healthy individuals. Cocoa powder is rich in flavonoids, antioxidants shown to reduce "bad" LDL cholesterol and increase "good" HDL levels.

#4 Salmon 

A great source of omega-3 fatty acids, which have been linked to a reduced risk of depression, heart disease, and cancer. A 3-ounce serving contains almost 50 percent of your daily dose of niacin, which may protect against Alzheimer's disease and memory lost.

#5 Walnuts 

Contain the most omega-3 fatty acids, which may help reduce cholesterol, of all nuts. Omega-3s have been shown to improve mood and fight cancer, they may protect against sun damage too.

#6 Avocados 

Rich in healthy, satisfying fats proven in one study to lower cholesterol by bout 22 percent. One has more than half the fiber and 40 percent of the folate you need daily, which may reduce your risk of heart disease.