Millions of Americans turn to dietary supplements as a quick path to better health, but the reality is more nuanced than marketing implies.

Surveys show that about 75 percent of U.S. adults have used supplements, and federal data indicates 58 percent used one in the past thirty days, a broad pattern that invites careful scrutiny for people with chronic conditions, including diabetes.

Supplements span vitamins, minerals, herbs, amino acids and probiotics, designed to fill nutrient gaps or support functions such as immune health, muscle recovery and bone strength.

Unlike prescription drugs, supplements usually aren’t FDA approved before they hit shelves, though the FDA can take action against unsafe or misbranded products.

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For people with diabetes, certain supplements can pose serious health risks because of their effects on blood glucose or interactions with medications. National Institutes of Health resources and clinical guidance emphasize caution as patients navigate these options.

Dawn Menning, a California based registered dietitian and certified diabetes care and education specialist with Nutu, says people with diabetes should avoid taking St. John's Wort as a supplement.

"This herbal remedy can interfere with many diabetes medications by affecting the way the body breaks them down," This can make medications less effective and blood sugar management more difficult.

"It contains compounds such as polypeptide-p, which may act like insulin," she said. "Taking this with diabetes medications could increase the risk of hypoglycemia."

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"I would caution against using high-dose niacin supplements because it can noticeably raise blood sugar levels and make it harder to keep A1c in an optimal range," Michelle Routhenstein, preventive cardiology dietitian at EntirelyNourished.com in New York, said.

Asian ginseng has been linked to a boost in energy, focus and immune system health. It also contains antioxidants, which can provide cellular protection, according to Cleveland Clinic.

While it has also been linked to improved cardiometabolic factors for those with prediabetes and diabetes, some evidence suggests that ginseng could lower blood sugar levels when combined with diabetes medications.

This supplement is primarily used as an antioxidant and a source of vitamin A to support vision, immune function, and overall eye and skin health.

"The American Diabetes Association recommends against β-carotene supplementation for people with diabetes because of its association with increased lung cancer and cardiovascular mortality risk," Jordan Hill said.

Cinnamon is often promoted as a supplement for diabetes management and weight loss, as some research has shown it can help to reduce blood sugar and lower insulin resistance.

However, consuming large amounts of cinnamon can enhance the effects of diabetes and cause blood sugar levels to fall too low, which can cause hypoglycemia, Healthline warns. Cinnamon also includes a compound called coumarin, which can cause liver damage if consumed in large amounts.

This supplement can help to promote healthy digestion, skin and nervous system function, according to Mayo Clinic.

High doses of nicotinic acid (a form of niacin) can raise blood sugar levels and interfere with the effectiveness of diabetes medications, warns the National Institutes of Health. "These doses can even raise blood sugar levels in people who don’t have diabetes," the NIH states.

Oral aloe vera is often promoted for diabetes, weight loss and inflammatory bowel disease. However, when paired with diabetes medications, it could cause blood sugar levels to dip and increase the risk of hypoglycemia with medications, according to the National Institutes of Health.

For most supplements, there isn't evidence to support a beneficial effect on diabetes or its complications.

The American Diabetes Standards of Care state: "Without underlying deficiency, there are no benefits from herbal or nonherbal (i.e., vitamin or mineral) supplementation for people with diabetes."

The American Association of Clinical Endocrinology advises caution with all unregulated nutritional supplements due to "inconsistent composition, quality and potential for harm."

The primary concern with most supplements is not direct harm, but rather the lack of regulatory oversight. Experts emphasize speaking with a doctor before starting any supplement to understand how it could affect blood sugar levels, medications or overall diabetes management.