Vitamin D Deficiency Test
Check Your Vitamin D Status – Identify Low Levels Early
Low Vitamin D levels can contribute to weak bones, muscle aches, low mood, and frequent infections. A simple blood test gives clear answers, especially helpful if you have limited sun exposure, darker skin, are pregnant or older, or feel persistently tired.
What Is a Vitamin D Deficiency Test?
A vitamin D test measures the level of 25-hydroxyvitamin D [25(OH)D] in your blood, the most accurate indicator of your body’s vitamin D status. This form is produced in the liver after your skin absorbs sunlight or after you consume vitamin D-rich foods and supplements.
The results help our doctor determine if you have:
- Optimal levels – supporting healthy bones, muscles, and immune function
- Insufficiency – where levels are slightly low and may benefit from lifestyle changes or supplementation
- Deficiency – where levels are too low and require targeted treatment to reduce the risk of bone weakness, fractures, or other health issues
This test is quick, requires only a blood sample, and can be done at any time of the year.
Why Vitamin D Matters
Vitamin D supports:
- Bone strength and calcium absorption
- Muscle performance and balance (fall prevention)
- Immune function and infection defence
- Mood and energy
- Dental and overall metabolic health
Even in sunny Singapore, deficiency is common due to indoor lifestyles, sun protection, darker skin tone, and dietary patterns.
Symptoms of Vitamin D Deficiency
Vitamin D deficiency can be silent in the early stages, but over time, low levels may lead to noticeable health issues. Common symptoms include:
- Persistent fatigue or low energy
- Frequent colds or infections
- Muscle weakness or cramps
- Joint or bone pain
- Slow wound healing
- Hair loss or thinning
- Low mood, irritability, or symptoms of depression
- In severe cases, bone softening (osteomalacia) in adults or rickets in children
If you’ve been experiencing several of these symptoms, especially during periods of limited sun exposure, a Vitamin D test can help identify the cause and guide effective treatment.
What Causes Low Vitamin D Levels
Several factors can contribute to vitamin D deficiency, including:
- Limited Sun Exposure – Spending little time outdoors, using high-SPF sunscreen, or living in areas with limited sunlight.
- Dietary Deficiency – Low intake of vitamin D–rich foods such as fatty fish, fortified dairy, or eggs.
- Darker Skin Tone – Higher melanin levels reduce the skin’s ability to produce vitamin D from sunlight.
- Ageing – Older adults produce less vitamin D in the skin and may have reduced dietary absorption.
- Medical Conditions – Disorders affecting the gut, liver, or kidneys (e.g., celiac disease, Crohn’s disease, chronic kidney disease) can impair vitamin D metabolism.
- Obesity – Vitamin D can become stored in fat tissue, reducing its availability in the bloodstream.
- Pregnancy & Breastfeeding – Increased nutritional demands can lead to lower vitamin D levels if intake isn’t sufficient.
Identifying the root cause of low vitamin D is essential for correcting it effectively and preventing long-term health complications.
Who Should Consider a Vitamin D Deficiency Test
You should consider a Vitamin Deficiency Test if you have/are any of the following:
- Symptoms: bone or muscle aches, fatigue, low mood, frequent infections, poor exercise recovery
- Lifestyle: limited sun exposure, shift work, consistent sunscreen/covered clothing
- Life stages: pregnancy, breastfeeding, older age (>50)
- Medical factors: osteoporosis/osteopenia, thyroid or parathyroid issues, chronic kidney or liver disease, malabsorption (IBD, coeliac), post–bariatric surgery
- Medications: long-term steroids, antiepileptics, rifampicin, orlistat
- Athletes (performance and recovery)
Why Vitamin D Is Especially Important
Vitamin D is crucial for maintaining strong bones and teeth, supporting a healthy immune system, aiding muscle function, and regulating inflammation. It also helps your body absorb calcium efficiently, making it vital for long-term bone health and overall wellbeing.
Vitamin D Test
Vitamin D
Other Deficiency Tests
After Your Test
Once your Vitamin D test is completed, here is what you can expect:
How You’ll Receive Results
- Turnaround time: Results are usually ready within 3–5 working days.
- Secure delivery: Your results will be sent via WhatsApp or email once available. If further discussion is required, our clinic will contact you to schedule a consultation.
What the Results Mean
- Normal results: If your Vitamin D levels are within the healthy range, no further treatment may be needed. Our doctor may still provide tips on maintaining adequate vitamin D through sunlight exposure and diet.
- Low vitamin D: If deficiency is detected, we will arrange a review session. Our doctor will explain your results clearly and recommend treatment options, such as supplementation and lifestyle changes.
- High vitamin D: Elevated levels, though less common, can occur due to over-supplementation. In this case, our doctor will advise on safe adjustments.
Confidentiality
- Your Vitamin D test results are kept strictly confidential and are shared only with you.
Next Steps & Ongoing Care
- Supplementation: If required, Vitamin D supplements will be recommended with dosage tailored to your needs.
- Diet and lifestyle: Our doctor may suggest vitamin D–rich foods (e.g., fatty fish, eggs, fortified products) and safe sun exposure practices.
- Follow-up testing: A repeat test may be recommended after a few months to monitor your progress and ensure your vitamin D levels return to normal.
- Specialist referral: If deficiency is linked to an underlying issue such as malabsorption or bone disease, our doctor will refer you to a trusted endocrinologist or specialist.
- Preventive care: Regular monitoring may be suggested for individuals at higher risk, such as older adults, people with limited sun exposure, or those with chronic health conditions.
Treatments at Our GP Clinic
- Clinical evaluation – our doctor reviews your symptoms (e.g. fatigue, bone or muscle aches, history of fragility fractures) and risk factors such as limited sun exposure, darker skin tone, or dietary insufficiency.
- Lifestyle advice – we provide guidance on safe sun exposure and dietary sources of vitamin D (e.g. oily fish, fortified dairy, eggs).
- Supplementation – our doctor may prescribe vitamin D supplements in clinic, adjusting the dose according to the severity of deficiency.
- Monitoring – follow-up is arranged to track your progress and ensure symptoms improve with treatment.
- Referral – if deficiency is severe, persistent, or linked to underlying conditions such as malabsorption or kidney disease, we will refer you to an endocrinologist for further care.
Whatsapp Us Make an Appointment
*Prices listed were last updated on 1 July 2023. Prices may be subject to change.
*Price does not include consultation fee and GST.
Why Choose Regis Medical
Book Your Vitamin D Test
Don’t let low vitamin D quietly impact your health, book your test today and take the first step towards stronger bones, better immunity, and lasting vitality.
Finding Us
Holland Village
255 Holland Ave, Singapore 278983
Near MRT Exit B
Mon, Tues, Thurs, Fri:
8.30am - 2.30pm
5.30pm - 10.00pm
Wed:
8.30am - 2.30pm
Sat:
9.00am - 3.00pm
Closed on Sundays and Public Holidays. For the latest updates on our clinic’s opening hours, please check our Google Maps.
** GP registration ends 15 mins before the closing time above, while Physiotherapy & Acupuncture end registration 45 mins before. Please book an appointment in advance to avoid queues and disappointment.
Katong
437 Joo Chiat Road, Singapore 427650
Near Marine Parade MRT
Mon, Tues, Thurs, Fri:
8.30am - 2.30pm
5.30pm - 10.00pm
Wed:
8.30am - 2.30pm
Sat:
9.00am - 3.00pm
Closed on Sundays and Public Holidays. For the latest updates on our clinic’s opening hours, please check our Google Maps.
** GP registration ends 15 mins before the closing time above, while Physiotherapy & Acupuncture end registration 45 mins before. Please book an appointment in advance to avoid queues and disappointment.
FAQ
Accessibility & Support
Regis Medical Holland Village is located at 255 Holland Avenue, Singapore 278983
Regis Medical Katong is located at 437 Joo Chiat Road, Singapore 427650
Click here to view our opening hoursAppointment
To book an appointment at Regis Medical Holland Village, please call or whatsapp us 8118 5298
To book an appointment at Regis Medical Katong, please call or whatsapp us 9851 3728
You can only cancel or change your appointments up to 24 hours before your appointment. You will receive your refund within 3 working days. No refund will be issued for no shows and cancellations within 24 hours before your appointment. However, if you are feeling unwell on the day of the appointment, we allow patients who have their acute illness seen at Regis Medical to reschedule their appointment without extra cost.
This policy is subject to change.
Yes. You can reschedule your appointments. However, you need to reschedule your appointment at least 24 hours before your actual appointment time. If you are unwell on the day of the appointment, we will reschedule your appointment at no extra cost if you seek medical attention at our clinic (for non-emergencies only).
Finance
General
No fasting is typically required. You can eat and drink normally unless our doctor orders other tests that require fasting at the same time. You may also be asked to stopped taking some supplements days before the test. Our staff will advise accordingly.
- Deficient: Less than 30 nmol/L (12 ng/mL)
- Insufficient: 30–50 nmol/L (12–20 ng/mL)
- Sufficient: 50–125 nmol/L (20–50 ng/mL)
- Potentially harmful: Above 250 nmol/L (>100 ng/mL)
