I've just got my latest ferritin result and it is still too low - 25 ug/l (range 12-250 but I understand it really needs to be above 50). Over the past several years I've had it tested several times and it has varied from 18 to 38. I've been taking iron supplements for several years - 15-18 mg/day for most of that time but for many months now I've increased that to 30 mg/day (as iron picolinate) so was hoping that would improve my levels but apparently not. My multivitamin also contains 667 ug of folate (half as methylfolate and half as calcium folinate) and 133 ug of B12 (half as methylcobalamin and half as adenosylcobalamin) amongst other things.
I've recently switched to NDT and my latest thyroid results are:
TSH 0.47 mIU/l (0.27-4.2)
FT4 16.4 pmol/l (12.0-22.0)
FT3 4.4 pmol/l (3.1-6.8)
Other results that might be relevant:
HCT 0.398 (0.33-0.45)
MCHC (g/l) 352 (300-350)
Red cell folate 1486 nmol/l (285.4-1474.7)
Active B12 111 pmol/l (25.1-165.0)
Methylmalonic acid 0.10 umol/l (<0.29)
Homocysteine 10.10 umol/l (<15, desirable <10)
25 OH vitamin D 92 nmol/l (50-200)
I do have very heavy periods, which is the most obvious reason for chronic low ferritin but can anyone tell me whether any of these results suggest there might be anything else going on?
Should I increase my iron intake even further?
Should I switch to a different iron supplement and which type is best?