15. Hickory Nuts:

they are common in the Southern Appalachian and also been regarded as the place of origin. Hickory nuts fall from the hickory trees. The nut protects your heart and for those of you looking to gain weight naturally, here is something to munch on. They are also known to boost metabolism and increase circulation. A single serving of hickory contains about 18 grams of fat and more than 5 grams of carbohydrates for a 4-nut serving. These complex carbohydrates will not cause fluctuation in insulin and glucose levels, thus preventing the occurrence of diabetes.

Side Effects: Watch out for allergies that may arise out of consuming hickory nuts.

16. Kola Nuts:

It is native to the tropical rain forests of Africa.Kola nuts is of the size of a chestnut and has a bitter sweet when you start to chew. It gets sweeter with more chewing. The kola nut powder aids in digestion. The nut is also known to boost metabolism, with its caffeine content. In folk medicine, kola nuts are used for cough, by grounding it well and mixing it with honey. They contain caffeine, tannic acid, theobromine.

Side Effects: Breathing difficulties and stomach upset are two popular side effects of kola nuts. In case you have difficulty sleeping in the night, avoid taking them before your bed timings, as the caffeine content in them will keep you awake.

17. Macadamia:

Macadamia is indigenous to Australia. It contains some of the important nutrients and minerals needed for your body. It has vitamin A, B, protein, healthy fats, iron, folate and other powerful antioxidants. For a 100-gram serving it provides your roughly 700 calories of energy with zero cholesterol. These nuts are rich in monounsaturated fatty acids, that make the platelets not attach to each other and thus less likely to form clots in the blood vessels. It also helps in weight loss as they have low carbohydrates.