If it has been awhile since biology class, the endocrine system is made up of the eight major glands in the body that produce hormones. (babygaga.com)
There are 7 major chakras in yoga and tend towards major glands along the spine and in the skull that secrete hormones that regulate various bodily functions. (yogaorkney.com)
These studies have found that L - Ornithine supplements can actually regrow the immune gland (major gland) in the upper chest to more youthful levels, giving the immune system a hefty boost. (hgh10.com)