2 big confounders:
1.) I question what keto means to her -- many people say "keto" and eat a ton of veggies and "low sugar" berries.
These are difficult digesters but some people have a great microbiome and this will provide glucose.
2.) she is living the life she wants to live -- it literally gives her life. Her job is literally working out an hour a day and eating good food and doing makeup/fashion for another media event.
Studies show men in positions of power produce higher testosterone and live longer. My grandpa had that Henry Kissinger great generation power dynamic vibe. driving himself alone in his car in his 90s. He lived doing what gave him life, from being upper management in military industry for 30 years, having a hobby farm, and rubbing shoulders with influential people. He died healthy with a full head of hair, and was never obese.
-- but nobody is saying fries and catfish fried in seed oils and carrageenan icecream is a high performance longevity diet. He could do more manual labor at 75 than I could do at the worst of my autoimmune issues in my 20s and I ate way cleaner...
tertiarily but it's been mentioned: higher skin tissue melatonin levels preserve calcium in the cell more efficiently, thus black don't crack.