Any ideas please ...? Hope this is a good place to ask this question. I'm hypothyroid after RAI, and take 175 levo. I've had awful fatigue for 15 months. My ferritin is low in range, 58 (range 23 - 300) But all other blood results are good eg hb, folate, Vit D, B12. I feel I'm not converting to T3 well enough. T4 = 20 (8.0 - 21.0); T3 = 3.7 (3.8 - 6.0); TSH 0.03 (0.35 - 3.5) I'd like to raise my ferritin to help this. I've found this Ferritin product; wonder it would be good to raise my ferritin, maybe without raising hb level?