Smoke events have stopped being a local problem. Particulate from a fire can degrade air quality across entire regions for days, which means large numbers of people now deal with genuinely hazardous readings without ever seeing a flame.
Why wildfire smoke is a specific problem
It is predominantly PM2.5 — particles under 2.5 micrometres across. Size is the whole issue. Larger particles get caught in the nose and upper airway where the mucus layer handles them. PM2.5 reaches the small airways and the alveoli, where there is no escalator to sweep it back out, and the finest fraction can cross into the bloodstream entirely.
It also arrives in concentrations far above ordinary urban pollution and stays for days rather than hours.
Before a smoke season
- Install an air quality app and learn your local index bands. In the US system, under 50 is good, 51–100 moderate, 101–150 unhealthy for sensitive groups, 151–200 unhealthy for everyone.
- Buy a HEPA purifier sized for the room you spend most waking hours in, and a spare filter. They sell out the week smoke arrives.
- Get properly fitted N95 respirators in the house. Cloth and surgical masks do not filter fine particulate — this is not a small difference, it is the difference between filtering and not.
- Check whether your HVAC can run on recirculation and know where that switch is.
During a smoke event
Close up and recirculate. Windows shut, air conditioning on recirculate rather than fresh intake. Obvious and frequently forgotten in the evening when it cools down.
Run the purifier where you are. One unit in the room you occupy beats several scattered around the house on low.
Move exercise indoors, or skip it. This is the highest-leverage decision of the day. Exercise raises your ventilation rate several-fold, so a run in heavy smoke delivers far more particulate than the same hour spent sitting. Nothing about one missed workout matters.
Create one clean room. If the whole house cannot be managed, pick the bedroom: seal it as well as you can, run the purifier there, and at least sleep in filtered air.
Mask properly outdoors. A fitted N95 with a seal, not a loose one perched under the nose.
Afterwards
Ventilate thoroughly once readings come back down — indoor concentrations stay elevated after outdoor air clears if you have been sealed up for days. Replace or clean filters, which will have taken a hammering. Wipe surfaces where settled particulate can be re-suspended. And expect a few days of throat irritation or cough; if it persists more than a couple of weeks, get it looked at rather than waiting it out.
What no supplement does
Filter your air. Population research has linked antioxidant-rich diets with slightly less lung function decline in people exposed to pollution, but that is observational, modest, and about dietary patterns over years. On a smoke day, the purifier and the closed window are the intervention.
See the Full Formula ← More Articles