Take a walk through any corporate benefits fair, and you'll spot the same booth: glossy brochures, smiling vendors, and a tray of free zinc gummies. The pitch sounds simple: "Support your immune system." Since the pandemic, this message has become almost sacred. Employers have poured thousands into supplement programs, wellness points, and FSA reimbursements for zinc. What gets less attention is that your benefits system might be funding placebos, creating compliance risks, and wasting money.
I've spent two decades inside employee benefits, auditing plans under ERISA, applying HIPAA privacy rules, and tracking ACA preventive care mandates. The real problem is that your wellness program is probably subsidizing unregulated products with weak evidence. Zinc helps in narrow, time-sensitive circumstances; a blanket supplement subscription does not.
The Science Gap Most Employers Miss
The "immune-boosting" story is way overblown. Clinical evidence shows:
- Zinc lozenges can shorten a cold by about two days when started within 24 hours of symptoms, though the evidence is low certainty.
- Daily zinc for prevention? No solid proof. A 2024 Cochrane review found little to no reduction in colds among healthy adults taking daily supplements.
Yet wellness programs often treat zinc like a magic shield. Why? Because supplements are easy. You don't need to redesign your cafeteria, hire dietitians, or tackle mental health. A monthly zinc subscription is a quick win for engagement. Employees swipe a card, log a "healthy activity," and everyone feels good.
The systems problem is that you're spending benefit dollars on products that lack FDA pre-market approval, have variable absorption, and can interfere with certain antibiotics (quinolones and tetracyclines) or be depleted by some diuretics. Dietary supplements reach the shelf under the 1994 Dietary Supplement Health and Education Act, which requires no FDA approval before sale. The agency generally acts after a product is on the market, when a safety problem surfaces. Under ERISA, plan fiduciaries have to ensure expenses are "reasonable" and for the "exclusive benefit" of participants. Paying for placebos doesn't meet that bar.
The FSA/HSA/HRA Riddle
This is where most HR leaders slip up. Many employees assume zinc supplements are automatically eligible for FSA or HSA reimbursement. They're not. IRS rules allow reimbursement only when the supplement treats a specific medical condition, documented with a letter of medical necessity, such as a diagnosed zinc deficiency or Wilson's disease. General "immune support" doesn't qualify. The same medical-expense definition applies to FSAs, HSAs, and HRAs.
The catch is that third-party benefits platforms often rubber-stamp supplement purchases because they're sold by wellness vendors that market them as "health-related." That creates audit risk. If the IRS examines your substantiation practices, you could face disallowed reimbursements, and your employees could get hit with penalties.
Worse, some employers tie supplement purchases to wellness points. Example: "Spend $20, earn 500 points." That's dangerous territory. If your wellness program is connected to premium surcharges under the ACA, you could effectively penalize employees who don't buy supplements. That's a de facto mandate for unproven therapies.
Compliance Risk Under ERISA, HIPAA, and the ADA
Let's talk about three sets of rules that keep benefits lawyers up at night.
- ERISA: If your wellness vendor makes health claims about zinc that contradict peer-reviewed evidence, and you're paying them out of plan assets, you could breach fiduciary duty. Lawsuits have happened over less.
- HIPAA nondiscrimination rules: A wellness program that ties a reward to a health factor must be "reasonably designed to promote health or prevent disease." Rewarding employees for buying a supplement with no proven preventive benefit strains that standard.
- ADA: If your program includes a biometric screening that flags "low zinc" and then requires supplements to avoid a premium surcharge, you've created a medical examination without proper voluntary participation standards. The EEOC enforces this.
Most zinc programs don't violate these laws. But most benefits leaders have never run a legal review of their supplement offerings, and that is a risk worth taking seriously.
Immune-Support Marketing Is Already Under FTC Scrutiny
The vendor selling your zinc subscription has a separate exposure, and it reaches you. During 2020, the Federal Trade Commission sent repeated rounds of warning letters to supplement sellers and other marketers making unsupported claims that their products could treat or prevent COVID-19. Several rounds targeted immune-boosting pitches specifically. The letters state that the efficacy claims are unsubstantiated and violate the FTC Act. The "immune support" language on a wellness vendor's brochure is the same category of claim the FTC has flagged, so a plan that pays for those products with wellness points or FSA dollars is subsidizing messaging regulators have already questioned. That converts a marketing question into a fiduciary one. Before renewing a supplement subscription, ask the vendor to produce the evidence behind each health claim and keep the response on file. If the vendor cannot produce it, the plan should not pay for it.
A Smarter Systems-Based Approach
Instead of subsidizing unproven pills, direct your wellness budget toward interventions with evidence behind them. A practical checklist:
- Shift to nutrition counseling. Hire a registered dietitian. They can help employees identify actual deficiencies and document medical necessity for supplements. That makes FSA/HSA reimbursements legitimate.
- Reward behavior, not purchases. Give points for attending a nutrition class, completing a food diary, or getting an annual physical. Not for buying a product.
- Vet your vendors. If you allow FSA/HSA debit cards at supplement stores, make sure your third-party administrator has proper substantiation software that flags non-eligible items at point-of-sale.
- Create a "wellness formulary." As pharmacy benefit managers maintain drug formularies, list the evidence-based services and products your plan will cover. Zinc lozenges for acute cold treatment? Possibly, if prescribed. Daily zinc gummies for "immunity"? Hard no.
Run the Supplement Audit Before the IRS Does
The employee benefits world is full of well-intentioned but under-scrutinized offerings. Supplement programs, especially around immunity, are the latest frontier. As health costs keep rising, fiduciaries can no longer treat wellness as a marketing gimmick.
Zinc can be a useful tool in a doctor's hands. But as a system-level benefit, it is a loophole waiting to be closed by regulators, by auditors, and by savvy CFOs who ask, "Show me the data."
Your employees and your bottom line will thank you.