09/29/2026
We hear the same story:
“My doctor said my blood work is normal, but my hair keeps falling out.”
The truth is that laboratory reference ranges are primarily designed to identify disease. They do not necessarily reflect what is optimal for hair follicle function.
When reviewing hair loss cases, I pay close attention to patterns involving ferritin, vitamin D, thyroid markers, inflammation, dietary intake, stress, and hormones.
A result can be technically normal and still provide important clues when viewed through the lens of hair health.
If your hair is shedding, thinning, or refusing to grow, don’t ignore the message.
Your hair is data.
PMID: 35415182 | 23428658 | 30547302 | PMID: 39416654