Vitamin D Check Plus (Switzerland)

25-OH vitamin D is the storage form of vitamin D that the body produces in the liver from vitamin D formed by sunlight or food. Vitamin D supports calcium absorption, ensures healthy bones and teeth, and plays an important role for muscles, nerves, and the immune system.

The 25-OH vitamin D test is the best method to check vitamin D status. Low levels can indicate too little sunlight, an unbalanced diet, or diseases and are associated with bone diseases such as osteoporosis or rickets. Excessive levels usually result from too high supplement doses and can strain the kidneys and liver.

The biomarker alkaline phosphatase (AP) is an enzyme primarily produced in bones and the liver. An increase in AP levels in the blood can indicate bone or liver diseases. Therefore, measuring AP is an important part of diagnosing and monitoring bone and liver diseases.

Albumin is the most common protein in blood plasma and is produced in the liver. It retains fluid in the vascular system and transports vitamins, enzymes, and hormones.

A deficiency may be caused by liver or kidney diseases, inflammation, or poor protein supply. High albumin levels occur with fluid loss or a very high-protein diet. Since albumin also reflects the nutritional situation, persistently low levels indicate insufficient protein intake and an increased risk of muscle weakness or infections.