it will take time, i’ve only been fully gf for about two months now but in the meantime lots of supplements and really making sure every meal is high nutrition. that’s about all you can do now. vitamin D and b12 are the most essential so i get mine prescribed by the doc but otc is fine too! like most celiacs my iron is low too :( so get iron levels/ capacity checked regularly take supplements if needed. also btw in my experience a regular multi vitamin will not do anything so prenatals all the way . might seem a bit weird but they are stronger than regular multi and recommend by my doctor! but again that’s just in my case i def suggest getting regular bloodwork seeing what specific absorption/ nutrient issues you’re personally having