There has been an odd myth in modern western culture that said that we cannot take care of certain aspects of our own health through our lifestyle.
Fortunately, that’s changing, and it has been for a while.
We know that by acting healthy, we can maintain good health into old age. (Staying physically and mentally active, and perhaps even doing forms of yoga, meditation and inquiry.)
We know that by exercising our eyes, we can maintain good eye health or sometimes even reverse eye problems. (I used glasses from my teens. Started eye exercises in my mid-twenties. After a few weeks went back to the eye doctor who said my vision was good and I was in no need to glasses. And when I asked, she said that poor vision can’t be reversed….! My vision went from mildly near sighted – 0.75 to normal.) See f.ex. Natural Vision Improvement by Janet Goodrich.
We know that the mind can be trained. We can train a more stable attention. We can find kindness and love towards ourselves and others. We can even recognize our “true nature” (the layers of it). And all of this can be invited in and made into new habits. See f.ex. shamata (stable attention), ho’oponopono, loving kindness/metta, tonglen, holding satsang with parts of ourselves (kindness, love), and forms of insight meditation and inquiry (recognizing the dynamics of the mind and our human nature, and our true nature).
We know that by making a few relatively simple changes, we can maintain health free from (most or all) infections diseases, and many other diseases. See f.ex. K.P. Khalsa (my herbalist).
We know that by making similar simple changes, we can prevent and even reverse tooth and gum problems. See f.ex. How I healed my Teeth Eating Sugar by Joey Lott. (I am just starting this now.)
We know that tension and trauma can be released in a simple and natural way. (Neurogenic tremors, Tension & Trauma Release Exercises.)
There is a lot more here, and it keeps being further explored, adapted to our current modern culture, and widely available. Some of it – such as the effects of some types of meditation – is gaining increasing attention through research.