It's just vitamin C. Effervescent tabs are what I do.
I would check out Nootropics Depot for incredible quality and specialist products. It's run by someone who has the best reputation in the Nootropics community. Originally created Nootropics company Ceretropic they then bought Nootropics Depot and began to branch out into more mainstream supplements and herbs . Their medicinal mushrooms are a stand out and great care was taken to not cut corners which is common in the medicinal mushroom world where you end up getting none of the good stuff. They also accept crypto :D