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by William F. Supple, Jr., Ph. D.
Last synced: May 20, 2026
StarPower: All Things Vitamin D by William F. Supple, Jr., Ph. D. has 32,000 subscribers, making it a newsletter in Health & Wellness.
Latest research and news you can use on vitamin D, health and longevity. The focus is on the effects of high-dose (>5000 IU/ day) vitamin D3 on biological function, health and behavior.
A fuck it bucket of all the things I think and feel. (I have only one account, this one, any other account claiming to be me is a fake)
Occasional but worthwhile, quality over quantity
Biweekly
we teach overwhelmed busy people how to stop anxiety, fix sleep, and think clearly—using simple nutrition and 60-second resets. No therapy marathons. No complicated meal plans. Just fast relief for people whose brains won't shut up
Growing fast with a highly engaged audience
2-3x/week
I translate health science into habits that don’t require willpower — so being healthy doesn’t feel like a second job.
Growing fast with a highly engaged audience
Weekly
Share your story, I will give you a voice GrowthFactor.org@gmail.com. Empowering you to overcome life's challenges, find healing from anxiety, stress, depression, after covid19. Recognizing the importance of accurate information.
Deeply researched pieces with unusually loyal readers
Biweekly
Updated daily from real subscriber data. One insight pays for the year.
30-day money-back guarantee
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