What Happens When You Take Expired Vitamins?

When it comes to expiration dates, opinions are often divided. Some individuals adhere strictly to these dates, while others regard them as flexible guidelines. Vitamins, like many food products, have expiration dates on their labels, but do they actually degrade in the same manner as perishable items such as milk or meat? Is it safe to use them once their “best by” date has passed?

The situation isn’t straightforward. Experts agree that ingesting expired vitamins is unlikely to cause illness, although various factors can impact their potency and longevity. Here’s what you should know if your vitamins are approaching or have exceeded their expiration date.

Is it ever safe to consume expired vitamins?

The simple answer? It varies.

“From a clinical standpoint, the general recommendation is to stop using expired vitamins or supplements,” explains Aiya Almogaber, PharmD, clinical pharmacologist and toxicologist at Clinical Pharmacological Services, and assistant professor at the University of South Florida Taneja College of Pharmacy. “At the very least, the potency is likely compromised, and there is a greater risk of microbial contamination.”

Typically, the most common consequence of consuming outdated vitamins is reduced effectiveness. This is particularly concerning for individuals with nutritional deficiencies or those who need to consistently adhere to specific vitamin regimens.

“While a vitamin or supplement may not necessarily become unsafe after a certain date, you may not experience the full benefits,” says Andrew Fuchs, PharmD, RPhI, BCGP, director of practice experience and assistant professor of pharmacy practice at Touro College of Pharmacy in New York City.

For vitamins, the “best by” or expiration date signifies product potency. The date is determined by the manufacturer to guarantee that the product maintains its labeled strength until that specified time, Almogaber clarifies.

Unlike over-the-counter or prescription medications, vitamins and supplements are not regulated by the Food and Drug Administration. As a result, manufacturers hold sole responsibility for ensuring the safety and potency of their products, according to Almogaber.

Do different types or formulations of vitamins matter?

Yes, there are significant differences between vitamin types and their formulations, whether they come as tablets, gummies, gelcaps, or liquids. The type of form also plays a role in how quickly they break down. Almogaber offers insights on how these different formats compare:

• Gummies are favored by both children and adults. However, they often include sugar, moisture, gelatin, and pectin, which make them enjoyable to consume but also susceptible to clumping, melting, and bacterial or mold growth.

• Liquids begin to degrade quickly once opened due to exposure to air and light. They are also more prone to mold and bacteria.

• Gelcaps contain oil-based ingredients that react negatively to air, heat, and light, leading to potential rancidity over time.

• Tablets tend to have the longest shelf life since they are composed of compressed powders and binders.

• Fat-soluble vitamins—such as A, D, E, and K—are more sensitive to light, heat, and air. In contrast, water-soluble vitamins—such as the B vitamins and C—are generally less stable and deteriorate more rapidly.

What is the best way to store vitamins?

While keeping your vitamins in a bathroom medicine cabinet may seem practical, experts agree that it’s actually one of the worst options. Similarly, kitchen cabinets near the stove aren’t ideal either. The heat, moisture, and temperature fluctuations from hot cooking or steaming showers can degrade vitamins more quickly.

Always store vitamins in a cool, dark, and dry location, avoiding excess heat, light, and moisture. Experts recommend using a bedroom nightstand, a dresser drawer, a pantry shelf away from cooking appliances, or any cabinet in a temperature-stable room. Regardless of where you keep them, ensure they are well out of reach of children and pets.

When should you dispose of vitamins?

There isn’t a strict timeline, measured in weeks or months, for discarding expired vitamins. However, be vigilant about their appearance for signs that they need to be replaced. Changes in color, odor, or texture indicate that the ingredients may have degraded and lost potency, notes Fuchs.

“A useful guideline is that if the vitamins are not significantly past the expiration date and appear normal, it may be safe to consume them—just remember to replenish your supply,” Fuchs advises.

Almogaber adds, “When in doubt, it’s best to toss them.”

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