Vitamin D is necessary for calcium absorption. Vitamin D is often included in calcium supplement products.
Vitamin D should be used with caution in patients taking cardiac glycoside herbs with similar effects on the heart as
digoxin, because hypercalcemia (which may result with excess vitamin D use) may cause abnormal heart rhythms.
Vitamin D increases magnesium absorption.
Vitamin A may interfere with the absorption of vitamin D.
Vitamin D may lower blood sugar levels. Caution is advised when using herbs or supplements that may also lower blood sugar. Blood glucose levels may require monitoring, and doses may need adjustment.
Vitamin D may interfere with the way the body processes certain herbs or supplements using the liver's cytochrome P450 enzyme system. As a result, the levels of other herbs or supplements may become too high or too low in the blood. It may also alter the effects that other herbs or supplements possibly have on the cytochrome P450 system.
Vitamin D may cause low blood pressure. Caution is advised in patients taking herbs and supplements that lower blood pressure.
Use of vitamin D may reduce the need for analgesics (pain-reducing agents).
Use of vitamin D may increase aluminum absorption.
Vitamin D may also interact with antacids, antiasthmatics, anticancer agents, anticonvulsants, anti-inflammatory agents, antilipemics (blood cholesterol-reducing agents), cod liver oil, diuretics, fortified vitamin D foods, herbs and supplements that decrease calcium, herbs and supplements with contraceptive properties, hormonal herbs and supplements, immune suppressant herbs and supplements, laxatives, micronutrients, mineral oil, osteoporosis herbs and supplements, silicon, sunscreens, and vitamin K.
You should read product labels, and discuss all therapies with a qualified healthcare provider. Natural Standard information does not constitute medical advice, diagnosis, or treatment.
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