Good morning, First of all, blood calcium is not a good indication of tissue levels of calcium.A more accurate assessment would be ionized calcium , a bone density test and a food history. You mentioned that you have hemochromotosis. Have you received any nutritional instruction on how to manage this condition? I do not want to provide education where it is not wanted or needed, but this is a serious nutritional condition and if you need more information, please write back. Calcium supplements would help control your hemochromatosis as calcium blocks the absorption of any iron coming into the body. With the general public how we determine calcium supplementation needs is by looking at the recommended intake (800 mg/day for a healthy adult woman approx.), the dietary intake from milk, cheese, multivitamin and the diagnosis (osteoporosis, osteopenia, Trousseu s sign,etc) as well as medications. I can help you more specifically if you can come through the specialist portal and ask for me. I can work with you for a set of recommendations based on a more thorough assessment. Send me a one day food intake, list of medications, diagnosis, supplements, recent labs, height, weight and age. I can look at drug/supplement/nutrient interactions, instruct you on how to eat to manage your conditions, provide supplement education with suggested dosages. I also want to know specifically what is going on with the thyroid nodules. Do you have a copy of your complete thyroid panel? Biopsy of nodules? Doctors diagnosis of nodules. There are complex nutritional alterations in this condition. Coming through the specialist portal guarantees you will see me, gives me more time to work with you (I am timed in the gp portal) whereas we don t have that ticking clock problem with the specialist portal.Please include all requested information in your initial query to maximize our time together. To answer your question specifically in a forum is unreliably predictive and unethical. In general, however, dietary or supplemental calcium will more often show an increase in the blood as a result of too much vitamin D rather than too much calcium. I look forward to assisting you further should you decide you want more guidance on living a healthier, happier, and possibly, longer, life. Kathryn Shattler, MS,RDN