Dr.SurgeonPGH said:

Vitamin D levels and micronutrients: an often-overlooked connection.

Iron studies on micronutrients — important especially for women:

My ferritin cratered at month 6 from reduced dietary intake. Iron bisglycinate 36mg with vitamin C brought it back up. Don't wait for anemia symptoms — test proactively.

The figures, for anyone assembling their own picture. Say what you would expect to see if you were wrong, before you look. It is a small discipline and it changes what you notice.

Ask again with the specifics and you will get a better answer than this one.

Dr.SportsMedIN said:

Iron studies on micronutrients — important especially for women: Marker Baseline Month 6 After Supplementation Ferritin 55 23 45 Iron 85 50 93 TIBC…

Adding the part of the answer the thread has not reached. It helps to say which part of this you are uncertain about. A precise question gets a precise answer; a general one gets everybody’s favourite anecdote.

A narrower follow-up, since the general answer is now clear:

What did you change at the same time, and can you separate the two now?

OP back with an update, since a thread like this is useless without one.

Coming back a few months on. It held. Nothing dramatic to report, which is the report.