Yes, and it is one of the reasons a doctor orders blood work before anything else. Ferritin, which reflects your iron stores, and vitamin D are the two that show up most often, with thyroid close behind.
Transcript
Yes. And this is why a doctor orders blood work before anything else. Ferritin, which is your iron store, and vitamin d are the two that show up most often, and thyroid is close behind. Hair is expensive for the body to make, so it's one of the first things the body economizes on. That's also the good news. A deficiency has a fix, and hair usually follows once the level does.
Hair is metabolically expensive, so it is one of the first things the body economises on when something is short. That is also the encouraging part: a deficiency has a straightforward fix, and hair generally follows once the level does. It is not something to guess at — it is a blood test.