Hello, Yes it is true. You should have already 2 hours gaps between them. Consult me online for the detailed diet chart

Yes it is true, it is advisable not take iron pills/supplements or calcium at the same time. It is best to space doses of these 2 suppliments 1 to 2 hours apart, to get the full benefit from each medicine.

Yes, it does interfere with absorption. It is advisable to take calcium after breakfast, and iron capsules after lunch or at night. Make sure you drink plenty of water to ensure good absorption and prevent constipation. Also, these supplements should be taken only if you have a confirmed deficiency (diagnosed by a doctor/dietitian) .