Please help! My teeth are yellow even though I brush them 2 or 3 times a day every day, anyone know anything helpful?

Brushing. Brushing your teeth will only remove surface stains, not stains that have been absorbed into the enamel. For that you will need to use tooth whitening products. Your pharmacy sells otc products that work somewhat... You can have the gels professionally applied by your dentist for a better result.