How to read my vitamin D results in my blood test results? Also, is vitamin D 3000-4000 units a day safe for older adults that are in heart medication and other meds -
![Vitamin D deficiency symptoms: This feeling in your back could signal low vitamin D levels | Express.co.uk Vitamin D deficiency symptoms: This feeling in your back could signal low vitamin D levels | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/11/590x/1110690_1.jpg)
Vitamin D deficiency symptoms: This feeling in your back could signal low vitamin D levels | Express.co.uk
![HealthMatch - 42% Of Americans Are Deficient In Vitamin D. Are You At Risk? If So, What Can You Do About It? HealthMatch - 42% Of Americans Are Deficient In Vitamin D. Are You At Risk? If So, What Can You Do About It?](https://images.ctfassets.net/ld5gan8tjh6b/4FNFhhUSONVv15yW8pCtqL/70bcebb270e5646230739567200f81ba/Signs_of_vitamin_D_deficiency.png)