Madeleine Hull
A diet lacking in essential nutrients can lead to various health issues. For example, a diet rich in fruit but lacking in protein may result in deficiencies that impact hair, skin, and nail health. Similarly, a diet lacking calcium can weaken bones, and a vitamin D deficiency can cause rickets in children and osteomalacia in adults. A diet rich in dairy but lacking in carbohydrates may also be deficient in nutrients that provide energy to the body. Vegetarians and vegans may be at risk of vitamin B12 deficiency, and vegans may also lack creatine in their diet. To avoid nutrient deficiencies, it is important to maintain a balanced diet that includes a variety of food groups.
Characteristics and values of diets lacking in nutrients
| Characteristics | Values |
|---|---|
| Lack of carbohydrates | Diets lacking carbohydrates can result in a lack of energy and a deficiency of almost all important nutrients. |
| Insufficient protein intake | Diets low in protein can lead to deficiencies in hair, skin, and nail health, as protein is crucial for their structure. |
| Inadequate fruit consumption | A diet lacking fruit may provide energy but might miss out on certain vitamins. |
| Vegetarian and vegan diets | These diets may be deficient in vitamin B12, creatine, and carnosine, which are primarily found in animal-sourced foods. |
| Dairy deficiency | Dairy products are a source of calcium, and a diet lacking dairy can impact bone health. |
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What You'll Learn
Iron deficiency
The recommended daily allowance (RDA) of iron varies depending on a person's age and sex. For example, a male aged 19-50 years requires 8 mg of iron per day, while a female of the same age needs 18 mg. During pregnancy, the RDA increases to 27 mg per day.
To treat iron deficiency, it is important to include iron-rich foods in the diet, such as meat, poultry, seafood, beans, and green leafy vegetables. Heme iron, found in animal-based foods, is more easily absorbed by the body than non-heme iron, found in plant-based foods. However, both forms can help build up iron stores in the body. Vitamin C also helps improve iron absorption, so it is recommended to eat iron-rich foods alongside vitamin C-rich foods such as citrus fruits, peppers, and tomatoes.
In addition to diet changes, iron supplements may be prescribed to treat iron deficiency, especially in cases where iron levels remain low despite dietary changes. However, it is important to consult a healthcare provider before taking supplements, as too much iron can be harmful.
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Calcium deficiency
Calcium is one of the body's most important and common minerals. Most of the body's calcium is stored in the bones, but it is also needed in the blood. The calcium in the blood helps nerves function, muscles contract, blood clot, and the heart work properly.
A calcium deficiency, or hypocalcemia, is when the level of calcium in the blood is too low. This can be caused by several health conditions, including kidney failure, removal of the stomach, or the use of certain medications, such as diuretics. It can also be caused by inadequate calcium intake over a long period, especially in childhood, and during menopause. Vegans are also at a higher risk of developing a calcium deficiency, as they do not consume dairy products, which are rich in calcium.
A calcium deficiency can cause muscle aches, fatigue, insomnia, lightheadedness, dizziness, and brain fog. More severe symptoms include seizures, eye damage, abnormal heartbeat, and osteoporosis. Osteoporosis causes bones to become brittle and can lead to spinal fractures or other bone fractures and difficulty walking. A calcium deficiency can also lead to dental changes, cataracts, and alterations in the brain.
If you suspect you have a calcium deficiency, you should consult a healthcare professional. They will review your medical history and ask about your family history of calcium deficiency and osteoporosis. They will then take a blood sample to check your blood calcium level. If you are deficient, a doctor may recommend eating more calcium-rich foods or taking calcium supplements.
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Vitamin B12 deficiency
Vitamin B12, also known as cobalamin, is a water-soluble vitamin that is naturally found in animal products such as red meat, dairy, and eggs. It is necessary for the synthesis of DNA, fatty acids, and myelin. Vitamin B12 is also required for the production of healthy red blood cells, white blood cells, and platelets.
- Anemia: A lack of vitamin B12 can result in megaloblastic anemia, characterized by large, oval-shaped red blood cells that don't develop properly. This leads to a decrease in oxygen delivery to the body's tissues and organs, causing symptoms such as weakness, numbness, trouble walking, nausea, weight loss, irritability, fatigue, and increased heart rate.
- Neurological problems: B12 deficiency has been associated with cognitive issues, including problems with thinking, judgment, learning, and memory. It may also play a role in the development of Alzheimer's disease and stroke.
- Optic neuropathy: A rare condition caused by B12 deficiency, resulting in damage to the optic nerve and gradual vision loss or blind spots.
- Skin and hair issues: Low levels of B12 have been linked to hyperpigmentation (dark spots) and vitiligo (light patches), as well as hair loss.
- Mental health: Several studies have found a link between depression and low levels of B12, suggesting that screening for B12 deficiency and providing supplements may help delay or prevent depression in some individuals.
People at risk of vitamin B12 deficiency include those following a strict vegan diet, as well as those with certain medical conditions such as pernicious anemia, Crohn's disease, celiac disease, or other conditions affecting the small intestine. Metformin treatment and exposure to nitrous oxide have also been linked to B12 deficiency.
If you suspect you may have a vitamin B12 deficiency, it is important to consult a healthcare professional for a proper diagnosis and treatment plan, which may include vitamin B12 supplements or injections.
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Vitamin D deficiency
Vitamin D is a fat-soluble nutrient that is essential for bone development and maintenance. It helps the body absorb calcium, magnesium, and phosphate, which are critical for bone health. A deficiency in vitamin D can lead to several health issues.
The consequences of vitamin D deficiency can be severe. In children, it can cause rickets, a rare disease resulting in soft and bendable bones. For adults, vitamin D deficiency can lead to osteomalacia, characterized by weak bones, bone pain, and muscle weakness. Additionally, low vitamin D levels have been linked to an increased risk of osteoporosis, where bone density decreases, contributing to fractures.
The treatment for vitamin D deficiency involves supplementation with vitamin D2 or D3, tailored to the severity of the condition. Dietary modifications and adequate sun exposure are also recommended. High-risk populations, such as those with limited sun exposure and older adults, require routine screening and monitoring.
It is important to note that while sun exposure is a natural way to obtain vitamin D, excessive sun exposure can lead to skin ageing and skin cancer. Therefore, individuals should be cautious and consult their healthcare providers to determine the appropriate amount of sun exposure and the required dosage of supplements.
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Iodine deficiency
Iodine is an important trace mineral that is essential for normal growth and the development of the brain. Iodine deficiency occurs when an individual does not consume enough iodine in their diet. This can be due to various factors, such as a lack of iodine in the soil where food is grown, or certain life stages with higher iodine requirements, such as pregnancy or breastfeeding.
The symptoms of iodine deficiency can be severe and include swelling in the neck, weight gain, learning difficulties, and pregnancy-related issues. It can also lead to hair loss and dry, flaky skin due to the impact of low thyroid hormone levels on hair follicle regeneration and skin cell turnover. Additionally, low thyroid hormone levels caused by iodine deficiency can affect sweating and body temperature regulation.
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Frequently asked questions
A diet lacking in nutrients is usually one that is not broad and varied. Removing a food group from your diet can result in deficiencies of necessary nutrients. For example, a dairy-free diet might lack calcium and vitamin D. A gluten-free diet might lack thiamin, riboflavin, iron, calcium, folate, vitamin D, and magnesium. The keto diet, which involves eating very few carbs, can result in missing out on vitamins and minerals found in starchy vegetables, legumes, and fruits, such as zinc, potassium, magnesium, and beta carotene. Plant-based diets are considered healthier, but they need to be balanced and diverse to provide the right amount of nutrients daily. Vegetarians and vegans may risk vitamin B12, vitamin D, iron, zinc, and calcium deficiencies as these micronutrients are mostly found in animal foods.
Nutrient deficiencies are uncommon with a broad and varied diet. However, aging, hormonal factors, or dietary choices can leave women short of four key vitamins and minerals: vitamin D, iron, vitamin B12, and calcium. Iron deficiency is one of the most common nutrient deficiencies in the world, affecting more than 25% of people worldwide. Vitamin B12 deficiency is common among those who don't eat animal products as B12 is only found in sufficient amounts in animal foods. Vitamin D deficiency is also common, especially as we get older, since few foods are naturally rich in it.
Most deficiencies are subtle, with few glaring signs. Blood tests can reveal whether you're lacking in key nutrients, including vitamin D, iron, or B12. However, calcium levels cannot be accurately gauged from a blood test. Unless you are intentionally avoiding entire food groups or drastically limiting your diet, most supplements are unnecessary. Focus on an overall balanced eating pattern with a wide range of nutrients from a variety of sources.
