High neutrophils and low lymphocytes can mean your body is under severe stress or fighting an infection. The neutrophil-to-lymphocyte ratio (NLR) helps doctors understand how sick you are and what ...

Medically reviewed by Kelly Wood, MD Key Takeaways High TSH levels can mean you have an underactive thyroid or a pituitary gland tumor.Low TSH levels can mean you have an overactive thyroid or issues ...

“Normal” levels of vitamin B12 may not be enough to ward off dementia, new research finds. Researchers at the University of California San Francisco studied 231 healthy older adults (averaging 71 ...

Meeting the minimum requirement for vitamin B12, needed to make DNA, red blood cells and nerve tissue, may not actually be enough – particularly if you are older. It may even put you at risk for ...

Ferritin is a protein that stores and releases iron (a mineral) in the body. A ferritin test measures how much of this protein is in your blood, helping diagnose health conditions caused by too much ...

The term cortisol has gone viral on social media. Nearly every health influencer has emphasised the importance of keeping the ...

Hyperglycemia refers to high blood glucose levels, while hyponatremia refers to low blood sodium levels. While they are different conditions, some people with hyperglycemia might also have ...

The anion gap blood test measures the acid-base and electrolyte balance in the blood. Results can show whether there is an imbalance in a person’s pH levels, which may be making the blood too acidic ...