Evidence-based articles about vitamin D, sun exposure, and health optimization.
97 articles
High-protein diets are popular for fat loss and muscle gain, but their interaction with vitamin D metabolism is rarely discussed. Here's what the clinical evidence shows.
Work-from-home fatigue often gets blamed on screens and meetings, but low vitamin D is a consistent, measurable factor. Here's what the clinical data shows.
Seasonal affective disorder and low vitamin D both peak in winter months. Here's what randomized trials and longitudinal data reveal about whether supplementing actually helps.
Low vitamin D appears consistently in people with psoriasis, and topical D analogues are already first-line treatment. Here's what trials and mechanistic data show about the systemic link.
Low vitamin D appears consistently alongside thyroid disorders, from Hashimoto's to hypothyroidism. Here's what trials and mechanistic data actually reveal.
The liver performs a critical step in vitamin D activation — and liver disease quietly disrupts it. Here's what the clinical evidence shows about 25(OH)D levels and liver function.
Night-shift nurses and ER workers face some of the lowest vitamin D levels in any occupation. Here's what the evidence shows and what to do about it.
Can you get vitamin D from the sun after 4 PM? The honest answer depends on your latitude, season, and UV index — not the clock. Here's what the data shows.
Large randomized trials, including VITAL, now show vitamin D supplementation cuts new autoimmune diagnoses by around 22%. Here's what the evidence actually says.
Shift workers have some of the lowest vitamin D levels in occupational research — and irregular sleep timing makes the problem worse. Here's what the evidence shows.