Trans Fats or Hydrogenated Fats. Trans fats are actually unsaturated fats, but they can raise total and LDL (bad) cholesterol levels while also lowering HDL (good) cholesterol levels. Trans fats are used to extend the shelf life of processed foods, typically cookies, cakes, fries and donuts.rans Fats or Hydrogenated Fats. Trans fats are actually unsaturated fats, but they can raise total and LDL (bad) cholesterol levels while also lowering HDL (good) cholesterol levels. Trans fats are used to extend the shelf life of processed foods, typically cookies, cakes, fries and donuts.
High-efficiency particulate arrestance (HEPA), also sometimes called high-efficiency particulate arresting or high-efficiency particulate air, is a type of air filter.
Every air purifier we reviewed uses HEPA filters, which are capable of removing 99.97 percent of small particles from the air. This filter type is an industry standard, so a purifier should use HEPA or equivalent filters.