As a general rule in the herbs and supplement market, you get what you pay for. I find that most people absorb alcohol extracts best. The amount of alcohol in the mixture depends on the herb. Some manufacturers will remove some of the alcohol in order to make the mixture more palatable. Capsules and pills are often used by people who do not like the taste of herbs.
Capsules usually contain the herb or extract that has been dried and ground up.
People with strong digestive systems can digest the capsule shell but older people and people with low stomach acid secretion and poor digestion may have some difficulty. Tablets are even harder to absorb, because the materials are highly compressed and may have an added binding ingredient. Again, your ability to digest the coating and binders and release the herb will depend on the strength of your digestive system. Tea is a traditional form in many Eastern cultures. It is important to understand that when brewing or steeping tea, the container must be covered otherwise the valuable essential oils will evaporate away.