Health, happiness and longevity may constitute as the essence of good life. And the essence of life is change. Right from conception to the end of life, a series of changes take place in our body. Changes invariably occur due to natural progression of life or they may adversely manifest due to ill health or other factors.How do we meet the challenges of these changes? At each stage of life we face different problems: as babies problems tend to be teething and colic, later there are growing pains- and as teenagers lots of anxiety, later in the middle ages some will have hair loss, fertility, cardiovascular and gastrointestinal problems- and still later wear and tear problems as manifested by arthritis and other joint problems.Of course, the good health makes us independent, it builds our self-confidence, and adds zest to our life. It also means fewer visits to the doctor's surgery.How do we ensure good health? Without the need for scouring the Himalayas or the Amazon for that potion or elixir, often the simple adjustments to lifestyles such as diet, eating habits, regularity of the bowel and the sleep patterns, coupled with regular physical exercise can be very helpful. The emphasis on balanced and varied diet, and healthy lifestyle cannot be emphasised hard enough.Often the body's biochemistry, physiology, immunology may succumb to imbalance for a variety of reasons, resulting in health concerns. If a medical problem is suspected, first port of call should be a medical professional. Judicious use of nutritional supplements sometime can be of help. However, they should not replace or substitute a varied, balanced diet and a healthy lifestyle.