Emergen-C Effervescent multivitamin powder, tastes like a healthy version of Tang. Heavily loaded with vitamin C. I like Orange, but there are other flavors available.
KAL Nutritional Yeast Flakes A superfood which provides a nearly complete set of B Vitamins and amino acids in a highly usable form. Can use as a replacement for parmesan cheese (it has a savory flavor). Also available in tablet form.
Cod Liver and other Fish Oils I recommend Carlsons, Nordic Naturals, and Vital Nutrients Varieties. We have some of the Vital Nutrients variety for sale in the office.
