Vitamin D3 Supplements
Correct vitamin D insufficiency; support mood, immunity, bone health
Forms
Softgels, drops, tablets, sprays; D3 (cholecalciferol) or D2 (ergocalciferol)
Advantages
D3 raises serum levels more effectively than D2; low cost; widely available
Disadvantages
Fat-soluble — can accumulate; testing recommended before high-dose supplementation
Side effects
Rare at standard doses; toxicity (hypercalcaemia) with prolonged very high doses
Interactions
May increase calcium absorption — monitor if on thiazide diuretics or digoxin
At-risk groups
Office workers, darker skin tones, older adults, people in low-sunlight climates
Cautions
Avoid doses >4000 IU/day without testing; caution in sarcoidosis, granulomatous conditions
Related symptoms
Educational information only — not medical advice. This content does not diagnose, treat, or replace consultation with a qualified healthcare professional. Always seek professional medical advice for symptoms, supplement use, or health concerns.