doses, use multiple overlapping products, take concentrated herbal extracts, or continue supplements despite underlying liver or kidney disease**.
Vitamin A, vitamin D, vitamin C, high-dose niacin, iron, concentrated green tea extract, kava, multi-ingredient herbal formulas, and creatine in people with kidney problems all deserve particular attention.
Supplements can be useful when there is a genuine need, but more is not always better. When in doubt—especially if you take prescription medications or already have liver or kidney problems—review your supplement list with a healthcare professional before increasing the dose or adding another product.
