Health Benefits of Sage:
Research has shown that even small amounts of sage, whether inhaled or consumed, can increase recall abilities and memory retention in people. The brain activity also demonstrates increased concentration and focus on a chosen topic, which means that for young people in school or for those in challenging, intellectually demanding careers, adding a bit of it to your diet may be subtle, but an effective brain booster. 
Chewing on sage leaves is not always the most pleasant remedy, as the flavor can be quite intense, but this is the most effective way to get the organic compounds acting in your system. Creating a tincture or steeping the leaves can also do the trick, but if you suffer from inflammatory issues, particularly in the respiratory or gastrointestinal tracts, you can eliminate that inflammation with this sage brew.  The anti-inflammatory qualities of sage extend to health issues such as arthritis and gout, as well as general inflammation of the cardiovascular system, which can result in heart diseases and high blood pressure. The flavonoids and phenolic compounds found in it are responsible for these beneficial effects.
Chronic conditions and degenerative diseases can be some of the most debilitating and dangerous health concerns that you face in your life. Many of these are caused by free radicals, the dangerous by-products of cellular metabolism that attack healthy cells, causing apoptosis or mutation. Antioxidant compounds found in sage, such as rosmarinic acid, luteolin, and apigenin, can work to neutralize free radicals and prevent them from creating oxidative stress in the heart, organ systems, skin, joints, muscles, and even the brain. 
Prevents Alzheimer’s Disease
As mentioned above, sage does have the ability to stimulate brain function to improve memory and concentration; however, it also works to eliminate cognitive disorders that may arise, including Alzheimer’s and dementia.  Although research into these applications is still in the relatively early stages, it is exciting to see real strides being taken with herbal alternatives to pharmaceutical treatment. The neural pathways stimulated by the extracts and essential oils of sage can keep the mind fresh and youthful well into your older age.
Strengthens Immune System
There are some antimicrobial properties that have been identified in sage, and while it is usually consumed in small quantities, you can create a topical application of sage (salve or tincture) and use it to prevent bacterial and viral infections that attack the body through the skin.  We often think of illness entering through our nose or mouth, but the skin can also be compromised and be used as a gateway for foreign agents. A topical cream or antibacterial routine that includes sage could be an extra line of defense against that sort of illness vector…. MUCH MORE SEE LINK BELOW
Benefits of Sage:
Mercola for Sage: