The Nutrition Source doesn’t recommend or endorse any merchandise. For many diseases, but especially for most cancers, only long-term trials are informative. I actually have osteoporosis and need more calcium, or I actually have iron-deficiency anemia and wish extra iron . Vitamins are classed as low-threat medications by the Therapeutic Goods Administration , and are subsequently not assessed for efficacy, unlike most medicines sold in Australia. They require that the product is secure and that claims of efficacy can only be made with regard to minor illnesses. The TGA doesn’t examine the contents of the product and whether or not it is what the label says it is, but they declare to carry out “focused and random surveillance of products available on the market.” They encourage people to report any unsafe merchandise to them. The first particular person to formulate vitamins in the US was Dr. Forrest C. Shaklee.