Not every supplement on the shelf is safe for everyone. Age, prescription load, and the body’s changing ability to clear compounds all shift the equation, and for women over 60 the stakes climb fastest. Drug interactions multiply. Tissues hold onto fat-soluble vitamins longer. And many of the most aggressively marketed supplements have never been tested in older-adult populations at all.
This is a short list, not an exhaustive one. Six supplements that pharmacists raise eyebrows at when a woman over 60 mentions she’s taking them, organized by what the research actually shows. If you want the companion piece on what to take, see 9 Best Vitamins and Supplements for Women in Their 60s.
Pharmacists’ Six-Item Watchlist for Women 60+
| Supplement | Common Claim | Main Risk (Women 60+) | Safer Alternative |
|---|---|---|---|
| High-dose Vitamin E | Heart health / antioxidant | Bleeding risk; mortality at 400 IU+ | Nuts & seeds (food sources) |
| Iron (no deficiency) | Energy, prevents anemia | Oxidative stress, cardiovascular harm | Test first; use 50+ multi without iron |
| Kava | Stress & anxiety relief | Liver toxicity (FDA advisory) | Magnesium glycinate |
| DHEA | Anti-aging, energy, libido | Unpredictable hormone disruption | Doctor-supervised HRT if appropriate |
| St. John’s Wort | Mild depression | Blocks statins, blood thinners, antidepressants | Talk to your doctor — Rx options exist |
| High-dose Calcium | Bone density | Kidney stones; possible cardiac risk | Dietary calcium + Vitamin D3 + magnesium |
- You take three or more prescription medications.
- You started a supplement after a TV segment, a friend’s recommendation, or social media.
- Your doctor doesn’t have an up-to-date list of everything you’re taking.
- You have a personal or family history of any hormone-sensitive condition.
- You’re on blood thinners, statins, antidepressants, or heart medications.
- You’ve been picking up supplements at retail without running interactions by a pharmacist.
1. High-Dose Vitamin E
Vitamin E is widely sold as an antioxidant and heart-health supplement. At low doses, it’s generally safe. At high doses — 400 IU or more per day — the evidence turns. A 2005 meta-analysis from Johns Hopkins, published in Annals of Internal Medicine, pooled nineteen randomized trials covering more than 135,000 participants. Specifically, high-dose vitamin E supplementation was associated with a small but statistically significant increase in all-cause mortality — enough that the authors concluded such doses “should be avoided.”
Vitamin E also has blood-thinning properties. For women over 60 who take aspirin, warfarin, or any direct oral anticoagulant, that interaction is a meaningful bleeding-risk multiplier. Most older adults already get adequate vitamin E through diet without supplementing, which is why geriatricians tend to treat the high-dose pill aisle as low-hanging fruit in a “stop taking this” conversation.
“Just because it may be an anti-inflammatory doesn’t mean it’s the best thing for you. That is one I often counsel my patients to come off of.”
— Dr. Kathleen Hager, internal medicine geriatrician, OhioHealth (on high-dose vitamin E)
2. Iron Supplements (Without a Diagnosed Deficiency)
Iron deficiency is common in premenopausal women. After menopause, the picture flips. Without monthly blood loss, most women over 60 don’t need supplemental iron and can accumulate too much. Importantly, excess iron is stored in tissue, not excreted. Longitudinal cohort data from eastern Finland (the long-running Kuopio Ischaemic Heart Disease study) and others have linked high body-iron stores to oxidative stress and elevated cardiovascular risk, and iron overload is a well-established driver of liver damage.
As Dr. Victoria Maizes, MD, executive director of the Andrew Weil Center for Integrative Medicine at the University of Arizona, puts it: “Excess iron can increase the risk of heart disease, diabetes and various kinds of organ damage.” Many standard multivitamins still contain iron because they’re formulated for the broader adult population. If you’re over 60 and not iron-deficient, look specifically for a senior or 50+ formulation that lists no iron — and don’t supplement iron without a blood test (ferritin is the most informative single number) confirming you actually need it. Self-prescribed iron is one of the few supplements where “more” can be actively damaging.
3. Kava
Kava is marketed for stress and anxiety relief and does have real pharmacological effects: it produces sedation and reduces anxiety in clinical trials. It also carries a documented risk of serious liver toxicity. In 2002, the U.S. Food and Drug Administration issued a consumer advisory after reports of liver damage — including at least one case requiring a liver transplant — were associated with kava-containing supplements.
The risk isn’t strictly dose-dependent. Even moderate use has been associated with severe hepatotoxicity in some individuals. For women over 60, who are more likely to be on prescription medications metabolized through the same liver pathways, kava sits firmly on the “don’t” list at most independent pharmacies. If you reached for kava for sleep or anxiety, a 200–400 mg dose of magnesium glycinate at bedtime is a safer first move — well-studied, with a clean interaction profile.
“There have been numerous reports of severe liver toxicity and/or liver failure from both Europe and the U.S., occurring within weeks and up to two years after ingesting kava.”
— Matthew Goldman, MD, family physician, Cleveland Clinic
4. DHEA
DHEA is a hormone precursor sold over the counter as an anti-aging supplement, marketed for energy, mood, bone density, and libido. The problem is what happens inside the body: DHEA converts to estrogen and testosterone through pathways that aren’t tightly regulated, so the same daily dose can shift hormone levels meaningfully in some women and barely at all in others. The uncertainty starts even earlier than that. As Rachel Pope, MD, an OB/GYN and certified menopause practitioner at University Hospitals, puts it:
“We actually don’t know if our body even metabolizes oral DHEA the way we want it to.”
— Rachel Pope, MD, OB/GYN and certified menopause practitioner, University Hospitals
For women with a personal or family history of hormone-sensitive cancers — breast, ovarian, endometrial — that unpredictability is a meaningful concern; the Mayo Clinic advises that anyone with a hormone-sensitive cancer should not use DHEA, and notes that quality control on the supplement is often poor. For those on prescribed hormone replacement therapy, over-the-counter DHEA can confound the dose their physician is carefully titrating. So pharmacists are firm on this one: skip it unless your endocrinologist or OB-GYN has specifically recommended it and is monitoring your labs.
Most pharmacists welcome these and can answer them in five minutes — usually before you even pay for what you’re picking up.
- “I’m thinking about starting [supplement]. Will it interact with anything I’m currently taking?”
- “Are there any age-related reasons this isn’t a good fit for someone my age?”
- “Is the dose on this bottle the dose the research supports, or is it higher?”
- “Are there any third-party certifications I should look for on the label?”
- “How will I know whether it’s working — and how long should I give it before judging?”
5. St. John’s Wort
St. John’s Wort is one of the most-studied herbal supplements for mild depression and one of the most dangerous drug-interactors on the market. It induces a liver enzyme called CYP3A4 — meaning it ramps up the enzyme’s activity and speeds the breakdown of other drugs, which can quietly drop their levels below the dose you were prescribed. CYP3A4 helps metabolize a large share of prescription drugs in use today. The National Center for Complementary and Integrative Health, part of the NIH, names St. John’s Wort as a potent inducer that interferes with drugs including blood thinners (warfarin), the heart-rhythm drug digoxin, immunosuppressants, oral contraceptives, and antidepressants; the broader pharmacology literature adds statins and some chemotherapy drugs to that list.
“Say you needed a medicine at a dose of 200 milligrams. Because you’re also on Saint-John’s-wort, you only got 100 milligrams because it was broken down faster and it got out of your system faster.”
— Dr. Victoria Maizes, MD, Andrew Weil Center for Integrative Medicine, University of Arizona
The median U.S. woman over 60 takes three or four prescriptions concurrently, and St. John’s Wort can make several of those medications less effective at once. Because it’s sold next to multivitamins and marketed as “natural,” patients don’t always mention it. If you take it, mention it. Even better, read our pharmacist’s guide to reading a supplement label before adding anything new to your routine.
6. High-Dose Calcium Supplements
Calcium supplementation was the default women’s-health recommendation for decades. The evidence has gotten more complicated. A 2010 meta-analysis from the University of Auckland team led by Bolland, published in BMJ, pooled fifteen randomized trials. Notably, calcium supplements — not dietary calcium — were associated with roughly a 30% relative increase in heart-attack risk among people taking calcium without co-administered vitamin D.
Subsequent work has parsed the signal more carefully: the cardiovascular risk concentrates around high single doses (above 500 mg at once), without vitamin D, on a baseline of already-adequate dietary calcium. The food-first message is one cardiologists make directly. “I tell my patients to make sure they’re getting adequate amounts of calcium from their diets,” says Dr. Rhanderson Cardoso, a cardiologist at Harvard-affiliated Brigham and Women’s Hospital. The pharmacist’s translation is the same: get calcium from food where possible; if you supplement, cap each dose at 500 mg, pair with vitamin D3 and magnesium, and don’t double up on calcium-fortified products without realizing it.
- Instead of Kava — Magnesium glycinate, 200–400 mg before bed. Well-studied for anxiety and sleep, with a clean interaction profile for most older adults.
- Instead of high-dose Vitamin E — A small handful of almonds, sunflower seeds, and avocado. A 1 oz serving of almonds delivers roughly 7 mg of vitamin E — well within safe range, no pill needed.
- Instead of iron supplements (without testing) — Ask your doctor for a ferritin blood test first. If you’re genuinely low, food sources beat pills: lean red meat, lentils, fortified cereals paired with citrus for absorption.
- Instead of St. John’s Wort — Talk to your prescriber. Evidence-based options for mild depression exist that don’t share the drug-interaction risk, and your pharmacist can help compare them.
- Instead of high-dose calcium — Dietary sources first: plain whole-milk yogurt (~300 mg/cup), sardines with bones (~325 mg/serving), cooked kale. If you supplement, cap each dose at 500 mg and pair with vitamin D3 plus K2 and magnesium.
“Natural” is not the same as “safe at any age.” Each of the six supplements above has a defensible use case in some population. Just not, on the available evidence, in women over 60 who are also taking prescription medications without medical supervision. The simpler version: a five-minute pharmacist check before starting anything new, food sources first whenever the math allows, and the companion pieces on what to take in your 60s, your 70s, and how to make 65–85 your healthiest years yet when you’re building a stack rather than pruning one. If you ever wonder whether a supplement on your shelf has been recalled, our running recalls tracker is updated daily from FDA and USDA sources.
Anthony is a licensed pharmacist and freelance medical writer. He received his Doctor of Pharmacy at Wilkes University, where he graduated Magna Cum Laude. He is also a JD candidate at Penn State Dickinson Law school. Anthony writes, edits, and reviews content for a large number of clients within the medical and health industries. From individual practitioners to medical startups, Anthony’s clients rely on him for accurate information that will ultimately benefit patients and consumers.
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