I picked up Pure Encapsulations Nutrient 950 with NAC | Helps Provide Additional Immune Support | 240 Capsules from the multivitamin category because I needed something serious for my immune system. As a Marine who spent years in harsh conditions and now running multiple businesses in Houston, I don’t have time for supplements that don’t deliver. Pure Encapsulations has a reputation for quality, so I decided to invest the $86 and see if this product lived up to the hype.