Most wellness programs run on checkboxes. Flu shots, biometric screenings, a gym reimbursement nobody uses. Each one checks a box without moving the needle on health or cost.
There is a cheaper candidate in the vitamin aisle: zinc. It costs pennies a day, has a real, if mixed, evidence base for shortening colds, and could shave a day or two off each one.
What the Evidence Shows
A 2024 Cochrane review of 34 trials with 8,526 participants found that zinc lozenges or syrup, started within 24 hours of cold symptoms, may shorten a cold by about 2 days. Separate meta-analyses of properly dosed zinc acetate lozenges put the reduction around a third, with one 2024 analysis finding 37% in adults. On prevention, the same review found little to no benefit from taking zinc every day to avoid getting sick. That split between treatment and prevention matters for how you design the benefit.
Cost to an employer: pennies a day per person during cold season. Ignoring colds costs more. A University of Michigan study published in Archives of Internal Medicine put the annual U.S. economic impact of non-flu viral respiratory infections near $40 billion, counting doctor visits, medications, and missed work. More than a third of the patients in that study who saw a doctor for a cold left with an antibiotic prescription, a drug that does nothing against a virus. Shorten a cold by a day or two and a slice of that cost never happens.
Why Isn't Every Plan Doing This?
Three reasons, and they're all about system design, not science:
- No reward for the right behavior. The employee pays full price for a product that lowers your claims. There's no incentive for them to stick with it.
- No way to verify. Even if you wanted to subsidize zinc, how would you know anyone took it? There's no medical code for swallowing a tablet.
- Missed data. Supplement use is a goldmine of engagement data. Ignoring it means you're flying blind on who's actively managing their health.
How to Fix It
The trick is to treat zinc like any other preventive action, something you can track, verify, and reward. The evidence rewards starting zinc within 24 hours of the first symptom, so the protocol is built around that. A Health-to-Wealth benefits platform makes this simple:
- Track. Employee scans a QR code on the bottle through the app. The system knows they're in cold season and that their plan of care calls for zinc at the first sign of a cold.
- Verify. A time-stamped scan plus a once-daily confirmation while symptoms last creates a clean record that lives in the program's compliance-grade recordkeeping.
- Reward. Instant credit to a digital store (real dollars, not points) plus a deposit into their retirement account.
Net employer cost: no new out-of-pocket spend. The rewards are designed to be funded from the reduced claims and pharmacy spend the shorter colds generate, instead of a new budget line.
What Compliance Actually Requires
Rewarding zinc is a structured benefit, and it has to be designed that way. Three rules keep it on solid ground:
- Voluntary opt-in, with no penalty for skipping it.
- The same reward for every participant who completes the same verified action.
- Rewards tied to the plan's documented preventive actions, not to health outcomes.
Zinc has no CDC guideline behind it the way a flu shot does, so build the case on the plan's own documented framework and clinician-reviewed plan of care, and run the design past your benefits counsel. Automation and transparency do the rest, which is what a purpose-built compliance engine provides.
Side Effects and Why the Lozenges You Buy Matter
The same Cochrane review that found the two-day benefit also found a probable increase in non-serious side effects: nausea, an unpleasant taste, and stomach trouble. Plan communications should name that tradeoff rather than bury it. Formulation matters too. Meta-analyses led by Harri Hemilä have repeatedly found the benefit only in properly dosed lozenges, while many products on store shelves under-dose the zinc or add citric acid, which binds the mineral and blunts the effect. A reward program that treats every zinc bottle as equal pays for label adherence and misses the formulation the trials tested.
Why Zinc Is a Test Case
If your benefits system can't handle a simple, low-cost, recurring intervention like this, it will struggle with harder material like medication adherence or chronic disease management.
The employers who win over the next decade will be the ones who fund prevention the way they fund treatment and turn verified healthy habits into compounding wealth. A few dollars of zinc, taken at the right moment, becomes a shorter cold and a retirement account that grows a little faster. That's a flywheel worth spinning.
Three Steps You Can Take Tomorrow
- Look at your current preventive spend. How much goes to gym memberships nobody uses, versus interventions with published trial data behind them? Zinc is cheap enough that a 90-day pilot costs less than one avoidable urgent care visit.
- Ask your TPA or benefits platform: Can you create a compliance-grade reward for a verified daily habit? If they say no, that's a gap worth filling.
- Run a small pilot. Give 100 employees a zinc protocol for 90 days. Track cold-related sick days and how quickly people start it. Let the data tell you what to do next.
The missing ingredient is a system smart enough to reward the right actions before someone gets sick. WellthCare™ makes this possible by rewarding verified preventive actions with earned store dollars and automatic retirement contributions, working alongside your existing health plan.
This article is for general information only and is not legal, tax, or medical advice. Employers should consult their own advisors.