Useful for cystic acne.
I am currently taking 500mg 4 times a day in conjunction with B5. I have have taken this product for approximately 3.5 years and I have noticed a large improvement to my skin. Not only did this clear my skin but it is also said to improve natural HGH production. In addition to other health benefits that I've listed in the pros section. I'm not a doctor but I do know this works to clear acne (especially cystic acne) from experience. Toxicity levels have been cited to be above the 3 gram level and I have not experienced any adverse side effects when taking this product above those levels at 4 grams a day. If taken daily the side effect (flushing) becomes less apparent as time goes on. This product can still be extremely efficient when taken only once a day, however the flushing effect is more noticeable. I recommend if taken only once a day to take it at night to avoid any lingering stares or curious onlookers. I highly recommend taking a regular Niacin product and avoiding the "non flush" products. The non flush seems much less effective. The flush is evidence of the vitamin removing toxins from your body. This is why over time you experience a less intense flush when taken regularly. Pros: Cheap if taken at the minimum dosage all while still maintaining effectiveness. Greatly improves skin clarity and vibrance. Reduces bad cholesterol. Improves blood lipid profile. Said to increase HGH production. Also said to increase sex drive. Cons: Flushing will occur if taken haphazardly or at smaller doses.