Nutrients are helpful for your daily growth and you can get it from your day-to-day food. However, the typical Western diet, consumed by most Americans is low in many important nutrients and this is why for them, it is very common to be nutrient deficient.Here is a list of the top 7 nutrient deficiencies that are common among Americans:Iron DeficiencyIron is an essential mineral and is a large component of red blood cells. This is what binds with hemoglobin and transports oxygen to your cells. There are two types of dietary iron:Heme Iron: This type of iron is well absorbed and is only found in animal food, especially in red meat.Non-heme iron: This type is found in both animals and plants, however is not as easily absorbed as heme iron.As per a 2008 study and also the World Health Organization, iron deficiency is one of the most common nutrient deficiencies in the world. It affects more than 25% of people worldwide. The number also rises to 47% in preschool children. Around 30% of menstruating women are also iron deficient due to the monthly blood loss and up to 42%of young, pregnant women, too could be deficient.The common consequence of iron deficiency is anemia, where the number of red blood cells and your blood's ability to carry oxygen drops.Iodine DeficiencyIt is also an essential mineral for normal thyroid function and the production of thyroid hormones. They are involved in bodily processes, such as growth, brain development, and bone maintenance and are also beneficial in regulating your metabolic rate.It is also one of the most common deficiencies in the world, affecting a third of the world's population. The most common symptom is an enlarged thyroid gland, known as goiter. It can also increase your heart rate, and lead to shortness of breath and weight gain.Vitamin D DeficiencyIt is a fat-soluble that functions like a steroid hormone. It travels through your bloodstream into cells and tells them to turn genes on or off. Almost every cell in the body has a receptor for vitamin D.It is produced from cholesterol in your skin from exposure to sunlight, so people who live far from the equator, like in the West are more likely to be deficient. Studies suggest that the US has 42% of people who could be deficient in this vitamin and the number is rising to 74% in adults and 83% in people with dark skin since their skin produces less vitamin D in response to sunlight.Vitamin V12 DeficiencyIt is also known as cobalamin, a water-soluble vitamin, which is essential for blood formation, brain development and nerve function. While your body needs B12 to function, it is unable to produce naturally, so you need it from supplements. However, with age, the absorption of nutrients also decreases, leading to B12 deficiency.Calcium DeficiencyIt is also essential for every cell in your body and mineralizes bones and teeth. This is also important for the heart, muscles, and nerves to function.A survey shows that fewer than 15% of girls, fewer than 10% of women over 50 and fewer than 22% of teenage boys and men over 50 met the recommended calcium intake in the US.It is more prone to women and the elderly because the levels decrease after pregnancy and with age, the absorption also decreases.Vitamin A DeficiencyIt is also an essential fat-soluble vitamin which helps form and maintain healthy skin, teeth, bones, and cell membranes. It is found in animal products like meat, fish, poultry, and also in fruits and vegetables.Despite the inclusion of meat in the Western diet, as per a study, more than 75% of people with a Western diet do not have enough vitamin A and have to worry about their deficiency.Magnesium DeficiencyIt is a key mineral in your body that is essential for bone and teeth and is involved in more than 300 enzyme reactions. In the US, a study suggests, that 70% of people under 71, and 80% of people over 71 consume less than the required amount of magnesium.