I have a poorly insulated walls and no insulation in the floorsI do have double paned windows.
Fiber, people only take vitamins if their body are dependent on it and they are lackingIf you are a teen, fiber goes a long wayTaking vitamins now will make you dependent on it later, plus people can get all their vitamins if their diet is balanced.
it depends what they eat for the rest of the day.
Window blinds are a good way to goMost blinds, if properly sized and installed, provide a layer of inert air between the blind and the window pane, which provides a small amount of insulation valueAccording to Hunter Douglas, a cellular blind with nearly an R-8 insulating value is the highest value in the window coverings industry.
