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If you care about avoiding cancer, in addition to Vit D you should be aware of this interesting study finding cancer fighting foods using machine learning: https://www.nature.com/articles/s41598-019-45349-y

Figure 4 shows the foods and you can download the data from there as well for your own analysis.




The figure's largest circle is tea. What kind? Any kind?


Most people don't realize that most varieties of tea come from the same plant https://en.wikipedia.org/wiki/Camellia_sinensis

Your question is still a good one, but hoping the above context makes the "so tea as a blanket category just... works?" less absurd.


We don't know if the processing steps for green tea vs black tea removes or adds to the beneficial quantities.


Accidentally took a workshop on this at a tea festival a number of years back.

Turns out the “fermenting” of tea is mostly self contained. Autolysis, I think might be the word?

If you recall that caffeine is an insecticide this makes sense. The caffeine is stored as a time bomb waiting for some insect to chew. Mastication mixes the caffeine crystals and the enzymes already present in the leaf, which then render it soluble and bang, dead insect. To process tea you just need to activate the enzymes the right amount at the right temperatures, and then dry the leaves before they can rot.

If you get a proper oolong loose leaf, and let it steep long enough, you will find what looks like whole leaves in your cup. Not unlike those little dinosaur sponges they sell to kids. Just add water.


You can also grow it yourself. Just bought 2 plants


Interesting, can you realistically get good results from that when growing it in mild climate like US or Europe? Indoor? Greenhouse?


Yes. There are now a small number of tea plantations in the UK from Cornwall to Scotland. All outdoors

https://www.independent.co.uk/life-style/food-and-drink/tea-...

Even one in Sweden -

https://sverigesradio.se/sida/artikel.aspx?programid=2054&ar...

It takes about 3-5 years to first harvest though


Don't have any links handy but apparently keto and lowcarb increases survival odds.


yea...no[1]

The newest diet fad has not been around nearly long enough to even begin to determine its effect on longevity.

1. https://www.thelancet.com/journals/lanpub/article/PIIS2468-2...


There’s some specific targeted use when it comes to enhancing outcomes of chemotherapy. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5842847/


Just a guess, but keto diets are usually devoid of processed foods. I would wager less processed, pre-packaged foods would probably decrease cancer rates.


I've never been able to get a single definition of what a "processed" food is. What is it to you?


Something with additional sugar and preservatives added so it can be packaged and kept on the shelf for a long time.


the parent is saying keto may help survivability for cancer. The study you posted is about overall longevity, and specifically excludes people with cancer. Depending on the type of cancer, there is growing evidence that keto, or elimination of carbs, does reduce tumor growth.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5842847/


> Figure 4 shows the foods

This figure literally talks to me: "You should drink more tea!"


Well that's fascinating...




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