American Health Ester-C stands out due to its proprietary Ester-C form of Vitamin C, which is calcium ascorbate, known for its non-acidic nature. This makes it a preferred choice for individuals with sensitive stomachs who experience discomfort with regular ascorbic acid. The product also boasts a robust Citrus Bioflavonoids Complex, which includes a variety of beneficial compounds like Tangerine, Sweet Orange, Rutin, Hesperidin, Lemon, Lime, and Acerola. These bioflavonoids are crucial for enhancing Vitamin C's bioavailability and contributing their own antioxidant and anti-inflammatory properties, creating a synergistic effect. The listed 1000mg of Vitamin C per serving, despite the '500 mg' in the product title, provides a substantial daily dose to support a wide array of health benefits. The brand American Health is well-established and generally well-regarded in the supplement industry, adding to its credibility. The review count of over 2200 is strong, suggesting widespread consumer satisfaction with its effectiveness and tolerability.