Decreased BM due to an alteration of vitamin D metabolism, and a deficiency of enteric proteins participating in calcium transport have been described in CD. CD children with satifactory compliance with the gluten free diet have lower BM than controls. We were interested in evaluating the effect of suplementation with 1000 mg of calcium carbonate (Calcium factor) and 400 U per day of vitamin D (Vi-DE3) per day, during 2 years on the BM of 36 CD children of both sexes, aged 6 to 16 years, with an average of 5 years of gluten free diet. Bone mineral density (BMD) was measured in the spine, hip and total body with a Lunar radiologic densitometer. The results were expresed as Z score using references from healthy Spanish children. For statistical analysis the paired t test was used. These are preliminary results of 16 patients who have completed the first year of supplementation. Compliance was 88%. After 12 months of supplementation a significant increase of BMD of the trocanter (-0.06±0.86 vs 0.20±0.78, p<0.05) without differences in the other areas, were found. CD patients whose compliance whith suplementation exceded 93%, had a significant increase of trocanter BMD(0.0±0.76 vs 0.18±0.57, p<0.05) and femoral neck(-028±0.99 vs 0.19±0.71, p<0.05). CD patients with less than 93% compliance had no differences in BMD. However, there was a decrease of stature (Z -0.98±0.71 vs Z -1.14±0.63 p<0.02). These preliminary results agree with to the positive effect of this suplementation.