This is niacin, which can cause a flush...but once you settle on a dose for whatever condition you have researched you can build up to higher dosages because B needs to be taken in divided doses throughout the day. Some suggestions to decrease risk of flush is to take after a meal of cold rather than hot food and always work up to higher doses slowly. Your body should acclimate to the flush.

https://youtu.be/BafsDqvqf3w Dr. Berg speaks about flushing...

https://youtu.be/hnOMqR-X1J0 niacin flush

This is niacin, which can cause a flush...but once you settle on a dose for whatever condition you have researched you can build up to higher dosages because B needs to be taken in divided doses throughout the day. Some suggestions to decrease risk of flush is to take after a meal of cold rather than hot food and always work up to higher doses slowly. Your body should acclimate to the flush.

https://youtu.be/BafsDqvqf3w Dr. Berg speaks about flushing...