Is Vitamin D 45 low, normal or dangerous? What does Vitamin D level 45 mean?

📅 Medical Review Date: November 22, 2025

Your Vitamin D level of 45 is a Low Vitamin D level.

Low Vitamin D levels may indicate underlying health problems. The normal range is typically between 75 nmol/L and 250 nmol/L. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal Vitamin D range for men is :75 - 250 nmol/L

Ideal values of Vitamin D depending on age (male) :

Age	Ideal Vitamin D value
<5 years	78.375
5-10 years	81.902
10-15 years	85.588
15-20 years	89.439
20-25 years	93.464
25-30 years	97.67
30-35 years	102.065
35-40 years	106.658
40-45 years	111.458
45-50 years	116.474
50-55 years	121.715
55-60 years	127.192
60-70 years	132.916
70-80 years	138.897
80-90 years	145.147
90-100 years	151.679
>100 years	158.505

*Ideal values are calculated based on our database of patient records

Get Advice via Email : Send us your blood test report, and our Vitamin D experts will review it. You'll receive a detailed analysis and personalized treatment guidance via email within 12 hours. If you have additional blood test results besides Vitamin D, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

1,51,150

Total number of patients treated

A video message on the treatment of your low Vitamin D level

If you want your blood test report to be interpreted by Vitamin D specialist, you can upload your report. Our Vitamin D expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours.Upload blood test report now

Some examples of conditions that increase or decrease Vitamin D levels include:

• Liver disease
• Celiac disease
• Your body isnt properly absorbing or using vitamin D.
• Crohn's disease
• Kidney disease

Receive world-class medical opinion about your low Vitamin D levels over email.Upload blood test report now

Normal range of Vitamin D found among women :75-250 nmol/L

Ideal values of Vitamin D depending on age (female) :

Age	Ideal Vitamin D value
<5 years	78.476
5-10 years	82.113
10-15 years	85.919
15-20 years	89.901
20-25 years	94.068
25-30 years	98.428
30-35 years	102.99
35-40 years	107.764
40-45 years	112.759
45-50 years	117.985
50-55 years	123.454
55-60 years	129.176
60-70 years	135.163
70-80 years	141.428
80-90 years	147.983
90-100 years	154.842
>100 years	162.019

If you take a Vitamin D blood test and the results are not in the normal range (75-250 nmol/L), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the Vitamin D Test Is Done :

When your doctor orders a Vitamin D test, it involves a straightforward blood draw to measure your Vitamin D levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your Vitamin D test results are usually available within a few hours.

Medical References

• MedlinePlus – Vitamin D Test
• MedlinePlus – 25-hydroxy vitamin D test
• Mayo Clinic – 2425D - Overview: 25-Hydroxyvitamin D:24,25-Dihydroxyvitamin D Ratio, Serum