Can low iron levels lead to hair loss?
The short answer: yes!
A double-blind study demonstrated the importance of iron supplements in nonanaemic, iron-deficient women with hair loss.
In addition, the amino acid l-lysine was shown to be important as well.
Interestingly, there was no evidence to support the popular view that low serum zinc concentrations cause hair loss.
From the Journal of Clinical and Experimental Dermatology, the study: