Description
Vitamin D (cholecalciferol), often called the sunshine vitamin, is a fat-soluble nutrient obtained from sun exposure, fatty fish, eggs, and fortified foods. Calcium and phosphorus absorption, essential for bone health and teeth strength, requires sufficient vitamin D. This nutrient supports immune balance and muscle function, positively influencing mood and cognitive performance. Vitamin D exists primarily in two forms: D2 (ergocalciferol) from plants, and D3 (cholecalciferol) from animal-based sources, differing slightly in bioavailability.
Functions in the Body
Category
Deficiency Symptoms
Members unlock a concise, item-specific overview of what low levels (or low functional availability) may be associated with, written in neutral, non-diagnostic terms and limited to commonly referenced deficiency-pattern symptoms where applicable
Synergists & Antagonists
Members unlock practical pairing and separation notes that cover both supportive combinations and common blockers (supplements, fibers, binders, and absorption modifiers), plus clear “avoid/space” guidance where interactions are plausible
Vitamin D
Warnings
Vitamin D interacts with anticonvulsants, antacids, digoxin, calcium channel blockers, estrogen, and diuretics. Excess vitamin D supplementation may lead to toxicity, causing hypercalcemia, which can result in kidney damage.
Food Sources
Natural sources of vitamin D include fatty fish (such as salmon and sardines), cod-liver oil, liver, and eggs.
Time Frame
Members unlock simple timing guidance (with meals vs empty stomach, morning vs evening where it matters), keeping it consistent and practical without over-prescribing exact schedules
Disclaimer
Information on this page is for general educational purposes and is not medical advice. Nutrients and bioactive compounds can interact with medications and may cause adverse effects; consult a qualified clinician before use if on medication, pregnant/breastfeeding, under 18, or managing a medical condition. Stop use and seek medical advice if concerning symptoms occur.