Supplement Safety
It seems like these products should be harmless. After all, you use herbs all the time when you’re cooking. But some may not be safe, especially if you have certain medical conditions or take some medications. Talk with your doctor before taking any supplements.

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St. John’s Wort
This popular supplement is often taken for depression, anxiety, and sleep problems. But it can cause side effects like headache, nausea, dizziness, and dry mouth. And it may make you more likely to get sunburned. It also can cause problems if you take certain drugs — from heart medicines to antidepressants, and even birth control pills. And it can make some chemotherapy less effective.

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Kava
This is supposed to help with anxiety and insomnia. But it may cause liver damage, like hepatitis. So you shouldn’t take it if you have liver or kidney problems. Kava also can be dangerous if you drink alcohol or take other drugs that make you sleepy.