Gluconic acid is a naturally occurring organic acid that is produced by the fermentation of glucose. It is often used as a food additive and dietary supplement, including in some protein powders, due to its potential health benefits.
In protein powders, gluconic acid may be added as a source of acidity to enhance the flavor and taste of the product. It is also sometimes added as a preservative to help extend the shelf life of the product.
Additionally, gluconic acid has been shown to have potential therapeutic benefits for certain medical conditions, including osteoporosis and periodontal disease. It is thought to work by increasing the absorption of minerals, such as calcium, in the body.
Gluconic acid is generally considered safe when consumed in recommended amounts.