Various at-home tests can check levels of vitamins and minerals in a blood or saliva sample. Learn more about the best tests to order online in 2023.

Sending a soil sample for testing is not complicated. Follow the directions on the submission form. Collect your sample and put it in a plastic bag. Fill out the form and send the sample, the form and ...

This article was reviewed by Felix Gussone, MD. Key Takeaways: Preparing properly for lab tests helps ensure your results are accurate and reliable. Some tests — … ...

Deficiencies in vitamins and minerals like magnesium, iron, vitamin B12, vitamin D, and vitamin C can affect your energy and leave you feeling tired often.