300 mg is a lower dose than most comparable products in this category (which often contain 1000-1200 mg), but it is still well above the basic recommended daily allowance (RDA), which for adults is 80 mg. Data show that the body achieves almost complete absorption at a single dose of around 200 mg, above which the proportion of absorbed vitamin C drops sharply (Calder et al., 2025). This means that 300 mg is sufficient for most people for everyday antioxidant and immune support, while products with 1000 mg or more mainly offer a safety margin or are intended for periods of higher demand, rather than necessarily providing a proportionally greater effect.

No, this product is not suitable for vegetarians or vegans, as the capsule contains bovine gelatin as a shell ingredient, and the formula also includes shellac glaze, which is of animal origin (an insect secretion). If you are looking for a vegan version of vitamin C in capsule form, there are alternatives in this product category with a plant-based (HPMC) capsule without gelatin. We recommend always checking the ingredient list on the current packaging before purchasing, as formulations can change over time.

The sugar, glucose syrup, and corn starch in this product are not intended for sweetening in the classic sense, but serve a technological function – they are used as a binder and part of the extended-release system, as well as carriers for the glaze, which gives the capsule stability and makes it easier to swallow. The amounts of these ingredients per capsule are small and do not represent a significant source of calories or sugar in the diet. Nevertheless, this is a formula with more auxiliary ingredients than products with a simpler, pure vitamin formula, which is worth knowing if you want as few additives as possible.

Extended release theoretically allows vitamin C to be released into the body gradually over a longer period, which should reduce losses due to rapid excretion through the kidneys above the saturation threshold (~200 mg) (Calder et al., 2025). For this specific formulation, there is no publicly available independent pharmacokinetic data confirming an actual advantage over a regular capsule with the same dose. For general everyday use, the difference is likely small, but the extended-release form may be gentler on a sensitive stomach, as it avoids a single high concentration of ascorbic acid in the digestive tract.