How many times a day shoud brush teeth?

Floss more: Brushing is important but flossing rules. If you brush well ...2-3 minutes gentle and thorough you can do it once every two days but you need to floss every day. More brushing and flossing if you are susceptible to decay or have a systemic disease like diabetes or are older or not getting proper nutrition. Like so many things, life and genetics are not fair look at the tissue color if it's red.

Twice: Twice a day is generally considered to be often enough in the average person as that is enough to prevent plaque formation.

Brush teeth: Brush teeth in the morning to remove plaque that has formed overnight, and brush and floss before bedtime ( no eating after brushing). There is no reason not to brush more often. For an all-day cleaner and fresher mouth, also brush after lunch or after all meals.

Brushing not enough: Important that you brush 2x/day for at least 2 full minutes by the clock. Most adults brush less that a minute, which means they're missing a lot. More frequent brushing not harmful. Remember to brush gently but thoroughly...Don't scrub hard. Do this and your teeth will be about 70% clean. To reach 100% you have to floss or water-pik daily between teeth where toothbrush doesn't reach.

At least 2X: Best if can brush and floss after every time you eat...But a minimum of 2 times. Most important is before you go to bed.