Rickets Blood Test

What is Rickets?

Rickets is a childhood bone disorder that causes soft, weak bones that may become deformed. It is caused by deficiencies in vitamin D, calcium, or phosphate, which are essential for proper bone mineralization. The Calcium, Serum test is the most important test for diagnosing rickets because it measures blood calcium levels and identifies calcium deficiency as the underlying cause.

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What causes rickets?

Rickets is caused by deficiencies in vitamin D, calcium, or phosphate. Vitamin D deficiency is the most common cause because vitamin D helps the body absorb calcium and phosphate from food. Without adequate vitamin D, children cannot maintain proper calcium and phosphate levels needed for bone mineralization. This can occur from inadequate sun exposure, dietary insufficiency, malabsorption disorders, or kidney and liver diseases that affect vitamin D metabolism.

What is the best test for rickets?

The Calcium, Serum test is the most important test for rickets because it measures calcium levels in the blood and identifies calcium deficiency as a primary underlying cause of bone deformities. The Phosphate (as Phosphorus) test is also essential because it detects low phosphate levels (hypophosphatemia) that contribute to impaired bone mineralization. Together, these tests reveal the specific mineral deficiencies causing rickets and help healthcare providers determine whether vitamin D, calcium, or phosphate supplementation is needed for treatment.

When should I get tested for rickets?

You should get tested if your child shows signs of bone deformities such as bowed legs, thickened wrists and ankles, or delayed growth milestones. Testing is also important if your child experiences bone pain, muscle weakness, dental problems like delayed tooth formation, or frequent fractures. Children with limited sun exposure, dark skin living in northern climates, strict vegan diets without supplementation, or malabsorption conditions should be tested even without obvious symptoms.

What are the symptoms of rickets?
Rickets symptoms include delayed growth, bone pain and tenderness, skeletal deformities like bowed legs or curved spine, thickened wrists and ankles, and muscle weakness. Children may experience delayed motor skills such as sitting, crawling, or walking. Dental problems like delayed tooth formation, defects in tooth structure, and increased cavities are common. Severe cases can cause seizures or tetany due to very low calcium levels. The skull bones may soften, creating a condition called craniotabes.
Who is at risk for rickets?
Infants and children with limited sun exposure are at highest risk, especially those living in northern latitudes or who stay indoors frequently. Breastfed babies whose mothers have vitamin D deficiency and children on strict vegan diets without supplementation are vulnerable. Dark-skinned children living in areas with limited sunlight face increased risk because melanin reduces vitamin D production. Children with malabsorption disorders like celiac disease, inflammatory bowel disease, cystic fibrosis, or kidney and liver diseases affecting vitamin D metabolism are also at elevated risk.
What happens if rickets is left untreated?
Untreated rickets leads to permanent skeletal deformities including severely bowed legs, curved spine, pelvic deformities, and stunted growth that persist into adulthood. Children face increased risk of bone fractures throughout life due to weakened bone structure. Dental problems become chronic, with increased tooth decay and structural abnormalities. Severe untreated rickets can cause seizures from hypocalcemia, respiratory problems from chest deformities, and in girls, pelvic deformities that may complicate childbirth later in life. Early detection and treatment prevent these permanent complications.
Can rickets be diagnosed with a blood test?
Yes, blood tests are essential for diagnosing rickets and identifying the underlying cause. The Calcium, Serum test and Phosphate (as Phosphorus) test detect mineral deficiencies that cause rickets. Blood tests measuring vitamin D levels (25-hydroxyvitamin D) reveal vitamin D deficiency, the most common cause. Alkaline phosphatase levels are typically elevated in rickets, indicating increased bone turnover. Blood tests combined with X-rays showing characteristic bone changes and physical examination of skeletal deformities provide comprehensive diagnosis.
How is rickets treated?
Rickets treatment focuses on correcting the underlying deficiency through vitamin D supplementation, typically with high-dose vitamin D3 (cholecalciferol) given daily or weekly. Calcium and phosphate supplements may be added depending on blood test results. Dietary modifications include increasing foods rich in vitamin D (fortified milk, fatty fish, egg yolks) and calcium (dairy products, leafy greens). Increased safe sun exposure helps natural vitamin D production. Most children show improvement within weeks, with bone deformities gradually correcting over months. Severe skeletal deformities may require orthopedic intervention or bracing.
How can I prevent rickets?
Prevent rickets by ensuring adequate vitamin D intake through supplements and diet. Breastfed infants should receive 400 IU of vitamin D daily from birth. Children should consume vitamin D-fortified milk, fatty fish like salmon and mackerel, and fortified cereals. Safe sun exposure of 10-15 minutes several times weekly helps natural vitamin D production, though sun protection remains important. Children with dark skin, limited sun exposure, or living in northern climates need vitamin D supplementation year-round. Regular well-child checkups monitor growth and development to catch early signs.
What natural remedies help with rickets?
Natural approaches include increasing safe sun exposure to boost natural vitamin D production, aiming for 10-15 minutes of midday sun on arms and legs several times weekly without sunscreen. Dietary changes should emphasize vitamin D-rich foods like wild-caught salmon, mackerel, sardines, egg yolks from pastured chickens, and mushrooms exposed to UV light. Cod liver oil provides both vitamin D and vitamin A. Include calcium-rich foods like dairy products, fortified plant milks, leafy greens, and almonds. However, natural remedies alone cannot treat diagnosed rickets—medical-grade vitamin D supplementation prescribed by a healthcare provider is essential for recovery.
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If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
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