Is safe to take in combination: Zinc, Calcium complex, Vitamin C, Flax seed oil and Whey protein?

Those supplements. in combination are not a problem. Perhaps a more important question would be why do you take them all? If you have health concerns please see your doc or a nutritional consultant. Split vitamin C up into a.m. and p.m. doses because it only lasts about 12 hours in body. Peace and good health.