Hair transplant planning should not ignore basic health markers. Low ferritin, vitamin D deficiency and low protein intake can all make shedding harder to interpret.
Latvia has long low-light months, so vitamin D is a common discussion point. That does not mean supplements should be taken blindly; testing is more useful than guessing.
Ferritin matters because iron stores can be low even when a person does not feel obviously unwell. Diffuse shedding is one reason to ask whether blood work is appropriate.
Correcting a deficiency will not create a new hairline, but it can improve the background conditions before surgery or long-term hair treatment.