The “best vitamin C” is less about a single brand or form and more about matching the product to your needs. Ascorbic acid is the most common form and works well for most people. If you have a sensitive stomach, buffered forms may be easier to tolerate. Sustained-release formats can be convenient, but the key drivers remain total daily intake and consistency.\n\nFocus on four criteria: (1) a reasonable dose that aligns with daily needs, (2) quality assurance (e.g., GMP, third-party testing), (3) minimal unnecessary additives and sugars (often relevant for effervescent products), and (4) a delivery form you will use reliably (tablet/capsule/powder).\n\n“Strongest” often implies the highest milligrams, but higher dose does not automatically mean better outcomes—and it can increase side-effect risk. If your diet already provides adequate vitamin C, supplementation may not be necessary. If you do supplement, the goal should be to correct insufficiency and support a healthy dietary pattern, not to chase extreme doses.