D vitamin may help: you best get it by exposing your naked skin to sunlight.
I will try to expose more to sunlight , arms and legs. I spend all my day indoor.
The Wahl's Protocol is designed for cell and brain health, so it may be exactly what you're looking for.
See Dr. Terry Wahl's Ted Talk here: https://www.youtube.com/watch?v=KLjgBLwH3Wc
I've learned the hard way the importance of mental health as someone who had unfortunate pleasure of getting shingles in late 30s.
The first thing my doc asked me when I suspected shingles; "are you under a lot of stress?"
I nearly broke down and cried. I realized killed myself over work for nothing. For what? Never again. My outlook changed since then.
And some days of the week I avoid to be with a lot of people for a long time. I don't know, but for me after a meeting or group work I fell drained.
if fruits and veggies don't sound appealing, it's usually because someone's taste buds have been blasted to death with artificial ingredients. but, if you get off all that stuff for a few months, your normal taste buds should re-emerge.
Fasting has been shown to have countless numerous benefits that is extremely powerful for many purposes.
Be Careful with Supplements. in the US they are COMPLETELY unregulated. They could put whatever they wanted in there, even if it contradicts what's on the label. You don't need supplements in the first place. Just eat food. Nature's food already has everything the body could ever want. humans spent millions of years adapting to Nature's food, there's nothing better out there than that.
Yeah supplement market in US is crazy. I am another country where I buy from a great source when I need to complete my diet.
Anything that you eat or drink will affect your "general health"; from your gut bacteria to the pores on your skin. Water and caffeine-free herbal loose-leaf green are both very healthy in this regard.
Others have mentioned diet, sleeping, stress management, eating lots of fruits/veggies.
I'll add: Get regular, consistent, intensive exercise. Preferably something that targets your larger muscles (your legs/glutes) and your core. Doesn't matter what it is. Some people swear by Rippetoe's Starting Strength, but you choose what you like.
"Immune system" is a holistic term. Making sure your heart is healthy and strong, your bones are healthy, your gut is healthy, and so on, all contributes to your immune system.
Supplements are supplements. They're nice to have but they can't replace a diet that you can depend on every day. And they can't replace breaking a sweat during exercise either.
Immediately after watch it I sent an email directly for him (at the time a CEO of a company that would be sold to Amazon for 1.2B 8 months after) asking if I could have a digital version of the book since I was living in Brazil. For my complete surprise I received a response in less than 1 hour just asking for my address. One day after I received a physical copy of the book, signed by the very own Tony Hsieh. He even invited me to visit Zappos offices if I ever were in Las Vegas!
Today I woke up with this sad news. Definitely, a huge loss to the world. I'm sure you'll always be an inspiration to many.
Rest in peace Tony Hsieh, A big fan