VITAMIN D3 (25-HYDROXY) - GOLD TEST

The VITAMIN D3 (25-HYDROXY) - GOLD TEST measures circulating 25‑hydroxy vitamin D (25‑OH D), the accepted biomarker for assessing overall vitamin D status. Performed using gold-standard methods (typically LC‑MS/MS), this assay quantifies 25(OH)D2 and 25(OH)D3 to provide an accurate total vitamin D level that reflects intake, sun exposure, and metabolic status.

This test is essential for evaluating bone health, calcium regulation and immune support, and is recommended for people with suspected deficiency, those on supplementation, older adults, pregnant women, individuals with malabsorption or chronic kidney disease, and anyone with limited sun exposure in Dubai and across the UAE. Touch Connect’s at-home sample collection provides convenient venous blood draw by trained phlebotomists, with results and interpretation guidance to support safe supplementation and clinical decision-making.

• 25‑Hydroxy Vitamin D (25‑OH) — Total
• 25‑Hydroxy Vitamin D2 (25‑OH D2)
• 25‑Hydroxy Vitamin D3 (25‑OH D3)

• Symptoms of deficiency: fatigue, bone pain or muscle weakness
• Monitoring response to vitamin D supplementation or therapy
• Risk factors: limited sun exposure or extensive sunscreen use
• Conditions causing malabsorption (e.g., celiac disease, bariatric surgery)
• Older adults, pregnant or breastfeeding women, and infants
• Patients with osteoporosis, chronic kidney disease or certain endocrine disorders

• Gold-standard quantification (LC‑MS/MS) for accurate 25(OH)D measurement
• At-home venous blood collection across Dubai and the UAE by trained phlebotomists
• Clear assessment to guide supplementation and prevent under- or over-treatment
• Supports evaluation of bone health, calcium metabolism and immune status
• Actionable results with professional interpretation to discuss with your physician

• At-home venous blood sample collection by a certified phlebotomist
• No fasting generally required prior to the test
• Avoid high-dose vitamin D supplements for 48–72 hours before testing if clinically appropriate