Tablets are much cheaper to manufacture than capsules, manufacturers may compromise the purity and effectiveness of their products by coating herbs and nutrients with glue-like binders and then running the mixture through a tableting press. Since the tableting process requires placing herbs and nutrients under literally tons of pressure, the contents of your nutritional supplement are exposed to heat and subject to damage in the same way overcooked foods can lose their nutritional value.
The objective of taking a dietary supplement is for the herbs or nutrients to break down and be utilized by our bodies. Capsules do this process. In fact, they can do it better and quicker than tablets. The best supplements promote the quick uptake by the body of the nutrients they possess. Gelatin and Vegetable Capsules do this by being in a form that the body can easily assimilate easily, so it can access the herb or nutrient and expose it to processes that will ultimately lead to the nutrient taking part in cellular metabolism.