Noah Sinclair
Calcium is an essential mineral for maintaining healthy skin and nails. While calcium deficiencies can cause nail problems, there is little evidence to suggest that excess calcium causes finger nail ridges. In fact, calcium only constitutes 0.2% of the nail plate by weight. Instead, finger nail ridges are often indicative of aging, with vertical ridges being common in older adults. Horizontal ridges, also known as Beau's lines, may be indicative of more serious conditions such as malnutrition, serious nail injury, or kidney disease.
| Characteristics | Values |
|---|---|
| Excess calcium causing finger nail ridges | No evidence found |
| Calcium deficiency causing slow nail growth | Possible |
| Calcium deficiency causing brittle nails | Possible |
| Calcium deficiency causing weak nails | Possible |
| Calcium deficiency causing nail changes | Possible |
| Calcium's contribution to nail hardness | 0.2% of the nail plate by weight |
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What You'll Learn
Calcium deficiencies can cause weak, brittle nails
Calcium is essential for many bodily functions, and a deficiency can have widespread effects on the muscles, bones, and teeth, as well as mental health. A calcium deficiency can lead to dental changes, cataracts, alterations in the brain, and osteoporosis, which causes the bones to become brittle.
While calcium does not contribute to nail hardness and makes up only 0.2% of the nail plate by weight, a calcium deficiency can cause nails to become excessively dry and peel. This can cause vertical ridges to form on the nails, which can make them more prone to splitting or breaking. Vertical ridges are usually not a cause for concern unless accompanied by other symptoms such as colour changes. However, they can indicate a lack of calcium, iron, protein, zinc, or vitamin A, or a digestive disorder.
If you suspect that you have a calcium deficiency, you should consult a doctor, who can check your calcium levels and recommend a calcium supplement if necessary. The recommended dietary allowance of calcium for adults aged 19-50 is 1,000 mg, while females over 51 and males over 71 should consume 1,200 mg per day.
In addition to calcium supplements, you can boost your calcium intake by consuming dairy products, spinach, broccoli, and other leafy green vegetables.
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Calcium does not contribute to nail hardness
While calcium is an important nutrient for several bodily functions, including nail and bone health, it does not contribute to nail hardness. In fact, calcium only makes up about 0.2% of the nail plate by weight. Instead, the disulfide bonds of cystine in the matrix proteins contribute the most to nail hardness by gluing the keratin fibres together. Keratin and collagen type I are the major proteins in nails and bones, respectively.
Nails are made up of a horny "dead" product, the nail plate, and four specialized epithelia: the proximal nail fold, the nail matrix, the nail bed, and the hyponychium. The bulk of the nail plate is constituted by hair type (hard) keratins, which make up 80% to 90% of the nail plate. Epithelial type keratins account for 10% to 20%. The overall sulphur content is approximately 10% by weight. The lipid content is relatively low compared to the stratum corneum, but glycolic and stearic acids are present as nail plate lipids, contributing to water resistance.
Nail health can be a sign of general bone health. For example, people with osteoporosis may have higher displacement in their nails when subjected to a mechanical load. However, studies investigating the relationship between nail mineral content and bone density have been hampered by the methodology used to measure these parameters. While dual-energy X-ray absorptiometry (DXA) is the gold standard technique for evaluating bone health through bone mineral density, it does not explain all fractures. Therefore, alternative methods of assessing bone health are being developed.
While calcium deficiencies can lead to brittle nails, this is not the most common cause. According to the American Osteopathic College of Dermatology (AOCD), frequent wetting and drying of the nails is a more common cause of brittle nails. Iron deficiencies are also more likely to cause brittle nails than calcium deficiencies. Calcium-deprived nails may also become thinner, weaker, and grow very slowly. However, almost all nutrient deficiencies can slow down the growth of your nails, so it is important to monitor nail problems as they may be a sign of a different nutritional deficiency or health concern.
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Vitamin and mineral deficiencies can cause fingernail ridges
Fingernail ridges can be caused by vitamin and mineral deficiencies. Horizontal ridges, also called Beau's lines, can be a sign of kidney disease or another underlying condition. These ridges may appear as colourless indentations or as parallel white lines across the nail. Zinc deficiencies can result in Beau's lines, but they can also be caused by many other health issues.
Zinc deficiency is also associated with brittle nails. A lack of zinc can cause "depressions across the fingernails". Other horizontal lines that can appear on your nails are Muehrcke's lines, which are often a sign of low protein levels in the blood. However, they can also be caused by health problems like liver disease.
Deficiencies in folic acid, iron, and protein can all cause central ridges. A lack of iron can cause brittle or spoon-shaped nails. A biotin deficiency can also leave nails brittle and prone to breaking. Transverse leukonychia, or white streaks or horizontal lines on nails, can be caused by deficiencies in zinc, calcium, or B-complex vitamins.
While vertical ridges are generally not a cause for concern, they can develop if you have a skin condition like eczema or hypothyroidism.
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Ridges are usually harmless but can indicate ageing
Ridges in the fingernails are usually harmless and can be a typical sign of ageing. Vertical ridges, which run from the tip of the fingernail to the cuticle, generally appear later in life. They are caused by a slowing of cell turnover, when new skin cells produced below the surface rise up to replace dead skin cells being discarded from the surface.
While vertical ridges are harmless, horizontal ridges, also known as Beau's lines, may indicate a more serious underlying condition. Beau's lines can be a sign of kidney disease, malnutrition, serious nail injury, or diabetes. Other possible causes of horizontal ridges include zinc deficiency, vitamin deficiencies, and skin conditions like eczema.
Nail health can be a sign of general bone health and nutritional deficiencies. Calcium deficiencies can cause several potential health problems, including weak, brittle, and slow-growing nails. However, it is important to note that slow nail growth and brittle nails can also be caused by other factors, such as frequent wetting and drying of the nails or iron deficiency.
If you notice ridges in your fingernails, it is recommended to consult a doctor or dermatologist, especially if accompanied by other symptoms. They can examine your nails, assess any other symptoms, and advise on appropriate treatment or dietary changes.
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Horizontal ridges, Beau's lines, can indicate kidney disease
While calcium is essential for healthy nails, an excess of it is unlikely to be the cause of fingernail ridges. Instead, horizontal ridges, known as Beau's lines, can indicate an underlying health issue, particularly kidney disease.
Beau's lines are grooved horizontal indentations that traverse the fingernail, and sometimes the toenail, and can develop when the nail matrix's function is impaired. This can be due to various factors, including mechanical injury, certain medications, and systemic diseases such as kidney disease.
Kidney disease, or renal disease, is a condition where the
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Frequently asked questions
Excess calcium does not usually cause any immediate symptoms. However, over time, it can weaken your bones and cause serious complications. If you are experiencing nail problems, it is important to monitor them and consult a doctor.
Calcium deficiency can cause nail weakness and slow growth. However, it is not a common cause of nail brittleness. Other nutritional deficiencies, such as iron or zinc deficiency, are more likely to cause nail ridges.
Vertical ridges are often a sign of aging due to a slowing of cell turnover. Horizontal ridges, also known as Beau's lines, can indicate more serious conditions such as malnutrition, kidney disease, or diabetes.
If you notice nail ridges, it is recommended to consult a dermatologist, especially if you experience other symptoms. They may suggest gently buffing the nails to remove ridges or moisturizing to reduce their appearance.
