Why You Must Tell Your Doctor About Supplements and Herbal Remedies
It’s not uncommon to take a multivitamin, turmeric for joint pain, or garlic pills for immunity. But if you’re taking supplements or herbal remedies and haven’t told your doctor, you’re putting your health at risk-whether you realize it or not.
Most People Don’t Tell Their Doctors
A 2018 study found that only 13% of people taking dietary supplements mentioned them to their primary care doctor. Even among people with chronic conditions like diabetes, heart disease, or high blood pressure-people who are on multiple prescriptions-the disclosure rate barely cracked 51%. That’s alarming. Why? Because supplements aren’t harmless. They can interact with medications in dangerous ways.Take St. John’s wort, for example. It’s one of the most popular herbal supplements for mood support. But it can make birth control pills, blood thinners, and antidepressants useless. A patient might think they’re fine because they’re not feeling side effects-until they get pregnant while on the pill, or start bleeding internally from a minor cut.
Another common one is garlic. People take it for heart health. But if you’re on blood thinners like warfarin, garlic can amplify the effect. One Reddit user described how he didn’t mention his garlic pills until he bled excessively during minor surgery. His surgeon had no idea why his blood wasn’t clotting. That’s not a rare story.
Doctors Aren’t Asking-But They Should Be
Most doctors don’t ask about supplements. In a 2021 survey, only 27% of physicians felt they had enough training to talk about them. That’s not because they’re careless. It’s because medical schools rarely teach this. A 2022 policy from the American Medical Association changed that-now medical schools must include supplement interactions in their curriculum. But that change won’t affect today’s patients. Many doctors still assume: “If they’re taking something, they’ll tell me.”But patients don’t think of supplements as medicine. They think of them as “natural,” “safe,” or “just vitamins.” A 2022 ConsumerLab survey found that 68% of users believed their doctor didn’t need to know because supplements are “natural and safe.” That’s a dangerous myth. The FDA doesn’t approve supplements before they hit the shelf. The label says it plainly: “Not evaluated by the FDA.”
What Happens When You Do Tell Your Doctor?
The good news? When patients do disclose, doctors often help. In the same ConsumerLab survey, 78% of people who told their provider got useful advice. One woman on HealthUnlocked had been taking turmeric for arthritis for two years. Her cardiologist asked her directly about supplements during a checkup. He told her turmeric can interfere with blood pressure meds and raised her risk of bleeding. She stopped-no harm done.Doctors aren’t here to judge. They’re here to prevent harm. A 2021 study showed that using a simple 5-question screening tool during intake boosted disclosure rates from 33% to 78%. Questions like: “Are you taking any vitamins, herbs, or supplements?” “Have you started anything new in the last 3 months?” “Are you using anything for sleep, anxiety, or pain?”
It’s not complicated. And it doesn’t take long. In a 15-minute appointment, asking about supplements might add 30 seconds. But that 30 seconds could save a hospital visit.
What You Should Bring to Your Appointment
Don’t rely on memory. Bring the actual bottles. Or take a photo of the label. Write down the name, dose, and how often you take it. Some supplements have confusing names. “Ashwagandha” might be listed as “KSM-66 Ashwagandha” or “Sensoril.” Your doctor won’t know unless you show them.Even if you think it’s “just a tea” or “a little bit,” mention it. Green tea extract can affect liver enzymes. Black cohosh can interact with hormone therapies. Omega-3s can thin the blood. You don’t need to be an expert. You just need to be honest.
Why This Matters More Than Ever
In 2022, the U.S. supplement industry sold over $55 billion worth of products. There are more than 85,000 different supplements on the market. Many contain ingredients not listed on the label. A 2023 FDA report found that 172 ingredients have known safety concerns-up from 102 just three years ago.And it’s not just about interactions. Some supplements are contaminated. Others have heavy metals, pesticides, or even prescription drugs hidden inside. A 2022 study found that 1 in 5 weight-loss supplements contained unapproved stimulants. A third of “male enhancement” products had hidden sildenafil (the active ingredient in Viagra). Your doctor needs to know what’s in what you’re taking.
For older adults, the risk is even higher. Two-thirds of Medicare beneficiaries use supplements. Many take five or more prescriptions. Add in a few herbs or vitamins, and the chance of a dangerous interaction skyrockets.
What’s Changing
The good news? Things are starting to shift. By 2026, electronic health records will likely include a mandatory field for supplement use. Apps like MyMedList, developed by the University of Arizona, have already shown they can improve accuracy-users who used the app saw a 44% increase in correct disclosure.More doctors are being trained. More hospitals are adding supplement screening to intake forms. But none of that matters if you don’t speak up.
What to Do Next
- Before your next appointment, make a list of everything you take-even if it’s just “once a week.”- Vitamins
- Herbs (turmeric, ginger, echinacea, etc.)
- Teas (green, chamomile, hibiscus)
- Probiotics
- Essential oils (if taken internally)
- Meal replacements or shakes
Supplements aren’t the enemy. But silence is. Your doctor isn’t trying to shut you down. They’re trying to keep you safe. And you can’t do that if you’re hiding half your health routine.
Do I need to tell my doctor about vitamins and minerals?
Yes. Even common vitamins like vitamin E, vitamin K, and high-dose vitamin C can interfere with medications. Vitamin K can reduce the effect of blood thinners. Vitamin E can increase bleeding risk when taken with aspirin or warfarin. Your doctor needs to know the dose and frequency-not just whether you’re taking “a multivitamin.”
What if my doctor says supplements are useless?
You don’t have to agree. But you still need to tell them. Even if your doctor is skeptical, they need to know what you’re taking to check for interactions. Some supplements, like magnesium for constipation or vitamin D for deficiency, have proven benefits. Others don’t. But safety comes first. Your doctor can’t assess risk if they don’t know what you’re using.
Can herbal remedies cause liver damage?
Yes. Several herbs have been linked to liver injury, including green tea extract, kava, comfrey, and some weight-loss formulas. In 2023, the FDA added 12 new herbal ingredients to its safety watchlist. Liver damage from supplements is rare-but it’s real. And it often goes unnoticed until it’s too late. That’s why disclosure matters.
Is it safe to take supplements before surgery?
Not without telling your surgeon. Many supplements increase bleeding risk, including garlic, ginkgo, ginger, fish oil, and ginseng. Some can interfere with anesthesia. Surgeons typically ask patients to stop supplements 1-2 weeks before surgery. But if you don’t mention them, they won’t know to ask. That’s how avoidable complications happen.
What if my doctor doesn’t know about supplements?
That’s common. But you’re not alone. Bring printed info from trusted sources like the National Center for Complementary and Integrative Health (NCCIH) or the FDA’s supplement guidelines. Many doctors will listen if you come prepared. You can also ask for a referral to a pharmacist or integrative medicine specialist who specializes in interactions.