Vegan diet.

Why:

Here are 57 reasons. Number 27 stands out:

"Longer life. Several studies indicate that those following a vegan or vegetarian lifestyle live an average of three to six years longer than those who do not."

A vegan diet is also low in methionine, and a diet low in methionine "significantly increases longevity" in studies involving mice.

Additionally, a varied vegan diet brings with it superior nutrition, much lower risk of cardiovascular disease; lower cholesterol; lower blood pressure; greatly reduced risk of Type 2 diabetes; reduced risk of prostate cancer, colon cancer, breast cancer, and other cancers; reduced incidence of Macular degeneration and cataracts; reduced incidence of arthritis; and , despite what the dairy industry told us all for decades, reduced risk of osteoporosis. Bone health depends on a balance of neither too much or too little protein, adequate calcium intake, high potassium, and low sodium.

This is a much healthier dietary strategy than, say, the typical omnivorous American diet. And if you want to live a long, healthy life, a healthy diet is a good place to start.

And a vegan diet is essential for the transhumanist notion of abolition of suffering, as advocated by philosopher David Pearce, and by the Transhumanist Manifesto 2.0 and in the original Transhumanist Declaration, as well.

Nuts.

Why: "’What we find is that regular nut consumers have about a 20 percent reduction in all-cause mortality’ over the course of the study, says researcher Charles Fuchs of the Dana-Farber Cancer Institute and Harvard Medical School. This includes lower death rates from heart disease and cancer."

Probiotics.

Why: In the scholarly article "Gut–brain axis: how the microbiome influences anxiety and depression," authors Jane A. Foster and Karen-Anne McVey Neufeld provide clinical evidence that "Probiotics influence anxiety-like and depressive-like behaviors."  When shopping for vegan yogurts, I check to make certain that Lactobacillus rhamnosus JB-1 is included, as studies have found it effective in the treatment of such disorders as anxiety and depression

"’By affecting gut bacteria, you can have very robust and quite broad-spectrum effects on brain chemistry and behavior,’ researcher John Cryan, a neuroscientist at University College Cork in Ireland, told LiveScience."

I also look for raw/live/fermented foods for their probiotic content. For me, this includes food such as kimchi, Raw Slaw, and kombucha tea.

And because about 70 percent of our human immune systems are located in the gut, a healthier colony of bacteria means a more robust immune system.

Green Tea.

Why:  Green tea consumption is linked to greater lengths of telomeres.

From drweil.com:

"The researchers looked at the length of telomeres, repeating DNA sequences at the ends of chromosomes. (One expert suggests thinking about telomeres as the caps on the ends of shoelaces that prevent the laces from unraveling.) In cells, telomeres prevent chromosomes from fusing with one another or rearranging - undesirable changes that could lead to cancer and other life-threatening diseases.

Research has shown that as cells replicate and age, telomeres get shorter and shorter and that when telomeres finally disappear, the cells can no longer replicate. Some experts have suggested that the length of telomeres may be a marker for biological aging. The shorter your telomeres, the "older" you are. Earlier studies have suggested that telomeres are highly susceptible to oxidative stress.

Now, for the Hong Kong study findings: researchers looked at telomere lengths of 976 Chinese men and 1,030 Chinese women, all over the age of 65. All the study participants completed a food frequency questionnaire.

The researchers reported that telomere length was associated only with tea drinking – participants with the highest intake, three cups per day of tea, had longer telomeres than participants who drank an average of only one quarter of a cup of tea daily. Most participants drank green tea while a few drank black tea. The investigators reported that the average difference in telomere length corresponded to "approximately a difference of five years of life" and that the "antioxidative properties of tea and its constituent nutrients may protect telomeres from oxidative damage in the normal aging process."

Regular exercise.

This one seems obvious, but among  the benefits of regular exercise, but yields an impressive seven to nine additional minutes of life for each minute of exercise.

Wine.

Why: Dr. David Angus, in his new book, A Short Guide to a Long Life, prescribes 65 rules we should follow to achieve better health.

Rule #6: Have a glass of wine with dinner.

In an interview with Inside Edition, Agus said:

"A glass of red wine can also help you live a longer life, so have a glass of wine with dinner.

‘I say drink wine in moderation,’ said Dr. Agus."

Caffeine

Agus also recommends what he calls a sensible caffeine habit:

"RULE 18 Start a sen­sible caffeine habit. Consuming caffeine in moderation from natural sources like the coffee bean and tea leaf has long been shown to confer positive benefits on our health."

Orgasms

Seriously: "Cleveland Clinic’s Wellness Institute, claims 4-8 years of additional life can be garnered if we have 350-700 orgasms per year. … Other studies report 2-3 orgasms per week can make us look 7-12 years younger."

Among the articles I’ve cited, you’ll find even more suggestions from Agus and others. This essay only directly covers the strategies I employ regularly, but more options are available.