I am a research scientist and statistician by profession, meditator for 20+ years, and I was an ultramarathoner until symptoms showed up during a race.
I have experimented with almost every "natural" and alternative method or remedy I could find over the past 10 years. Homeopathic, herbs and tinctures, Chinese medicine, acupuncture, functional medicine, vitamins and minerals, diets (Paleo, vegan, raw), soap changes, and lots more.
Like others have said, everyone is different and the root cause of your symptoms are likely to be different from mine. Yes, and it sucks having to deal with the symptoms.
The only non-allopathic things that have consistently helped me are electrolyte caps morning and evening and during any exertion (1000mg per hour), maintaining hydration levels, getting off caffeine, and switching from mostly mouth breathing to nasal breathing, especially during exertion. Breathing change caused the single largest improvement in symptoms. I am almost symptom free now unless it is hot out. I can work outside for hours without POTS kicking in. I haven't been bedridden for days after exertion.
Science almost always lags behind because the peer-reviewed publication process is so conservative to new ideas. Good luck!