NuSci Sodium Ascorbate Pure Powder 500g (1.1lb, 17.6oz) VC-Na

What the brand says

Sold as “NuSci Sodium Ascorbate Pure Powder 500g (1.1lb, 17.6oz) VC-Na Buffered Vitamin C”

Sodium ascorbate is one of the mineral salt forms of ascorbic acid (Vitamin C). It can provide both ascorbic acid and sodium, and will not contribute to gastric irritation in acid-sensitive persons. Sodium ascorbate is produced from a combination of sodium bicarbonate and ascorbic acid.