Buffered Vitamin C Powder – Pure Organic, Stomach Friendly Ascorbic Acid VIT C Drink for Daily Immune Support & Collagen Production – Vegan Non GMO Sugar Free – 84 Servings Original, 8oz

Customers find this vitamin C powder to be of high quality and effective, particularly noting its benefits for immune system support during cold and flu season. They appreciate its ease of use, with one customer mentioning it's easy to take high doses, and consider it good value for money. The product receives mixed feedback about its taste and digestive effects - while some say it doesn't upset their stomach, others report it causes diarrhea.