[custom_adv] Melatonin is a hormone in your body that plays a role in sleep. The production and release of melatonin in the brain is connected to time of day, increasing when it's dark and decreasing when it's light. Melatonin production declines with age. [custom_adv] Your body usually makes all the L-arginine it needs. L-arginine is also found in most protein-rich foods, including fish, red meat, poultry, soy, whole grains, beans and dairy products. [custom_adv] Protein foods are broken down into parts called amino acids during digestion. The human body needs a number of amino acids in large enough amounts to maintain good health. [custom_adv] Your body produces vitamin D naturally when it’s directly exposed to sunlight. You can also get it through certain foods and supplements to ensure adequate levels of the vitamin in your blood. [custom_adv] Calcium is a chemical element that is essential for living organisms, including humans. It is the most abundant mineral in the body and vital for good health. [custom_adv] Magnesium, an abundant mineral in the body, is naturally present in many foods, added to other food products, available as a dietary supplement, and present in some medicines (such as antacids and laxatives). [custom_adv] Chocolate is a usually sweet, brown food preparation of roasted and ground cacao seeds that is made in the form of a liquid, paste, or in a block, or used as a flavoring ingredient in other foods. [custom_adv] In recent years, the popularity of coconut and particularly coconut oil has soared because of touted health benefits. Fueling the coconut oil trend, celebrity endorsements have claimed the ingredient to help blast away belly fat, curb appetite, strengthen the immune system, prevent heart disease, and stave off dementia and Alzheimer’s disease. [custom_adv] Vitamin C is an essential vitamin, meaning it can’t be produced by the body. Nevertheless, it has many roles in your body and has been linked to impressive health benefits. [custom_adv] Iron is a mineral that is naturally present in many foods, added to some food products, and available as a dietary supplement. Iron is an essential component of hemoglobin, an erythrocyte (red blood cell) protein that transfers oxygen from the lungs to the tissues. [custom_adv] Glutamine (symbol Gln or Q) is an α-amino acid that is used in the biosynthesis of proteins. Its side chain is similar to that of glutamic acid, except the carboxylic acid group is replaced by an amide.