My 5yr old daughter was struggling with concentration and memory with her reading and alphabet at school, also very poor hair growth. I wanted to start her on a magnesium supplement and came across this which has the added calcium and boron all in a natural marine formula. I knew I was deficient on calcium when I was expecting her, so I thought it might be good thing to try. I literally saw improvements in her reading within only a few days, and she has continued to improve. I definitely think I picked her deficiencies correctly, and this product has really helped. Her hair is also growing thicker. Only downside is that she doesn't like the taste of the tablets, says they are yuck, but still chews them up.