Vitamin D Liquid 25 mcg (1000 IU) by Thorne

If your Vitamin D, 25-Hydroxy is in the lower end of normal and you want a simple maintenance dose, vitamin D3 drops are practical. They fit adults with little sun, darker skin, consistent sunscreen use, or northern latitudes. People with higher body weight often need more than 1,000 IU for repletion. This liquid is best for upkeep, or for those who prefer drops over pills, but if your level is meaningfully low you’ll likely need a higher dose first.

Cholecalciferol (vitamin D3) is the form your skin makes from sunlight, and it raises blood levels more reliably than D2 (ergocalciferol). Your liver and kidneys convert it to a hormone that increases calcium absorption from the gut and helps regulate bone turnover by keeping parathyroid hormone (the signal that pulls calcium from bone) in check. Immune and mood effects are modest on their own; the clearest outcome tied to vitamin D is maintaining healthy bones and muscles.

Two drops deliver 25 mcg (1,000 IU) of vitamin D3. Take with a meal that has some fat, since vitamin D is fat-soluble. Timing is flexible, morning or evening is fine. If you’re correcting a low level, clinicians often start higher than this maintenance dose, then step down. Recheck Vitamin D, 25-Hydroxy after 8 to 12 weeks and adjust. Pairing with magnesium can help, as magnesium is a cofactor for vitamin D metabolism.

Avoid unsupervised vitamin D if you have a history of high calcium, recurrent kidney stones, granulomatous diseases like sarcoidosis, or severe kidney disease. Thiazide diuretics (blood-pressure pills that reduce calcium loss) increase the risk of high calcium with vitamin D. Orlistat and bile acid binders like cholestyramine reduce absorption, so separate by several hours. If you’re pregnant or breastfeeding, use vitamin D3 under clinician guidance and monitor Vitamin D, 25-Hydroxy.