However, the good thing is that its possible to raise your libido and testosterone naturally without even thinking of something as drastic as hormone replacement therapy. Stress, tiredness and low energy levels are known passion killers but you can do something about it and again Ginseng and Ginkgo Biloba are great body tonics. Another great one is: The endocrine system is really a band of glands that regulate our bodies with hormones. The glands are ductless, in order that they release hormones directly into the bloodstream. Hormones are chemical messengers which have specific targets called receptors. There are three kinds of hormones: steroid hormones, amino acid derivatives, and peptide hormones. The concentration of hormones inside bloodstream is regulated through feedback loops. The bioactive Glygopeptide compounds in Tongkat Ali have been proven to increase free testosterone and decrease SHBG levels in human medical trials. Rheumatic diseases often involve pain, pain, stiffness and swelling, as well as swelling around one or more joints. Symptoms can appear gradually or suddenly. Some rheumatism also includes the immune system and various internal organs of the body.