★★★★★
In 2010 in my mid-50's, my gums would occasionally bleed and some of my teeth were slightly loose. A daily 500 mg capsule of hesperidin corrected both of these these problems. I would order capsules from SwansonVitamins or PipingRock, but now I order the 500 grram bag of hesperidin powder from BukSupplements and take just a level 1/4 measuring teaspoon which is about 500 mg mornings and evenings.
I also had sensitive teeth at the time, but 2 capsules twice per day of the NOW brand "Calcium Apatite Caps" corrects this and prevents cavities.