most definately it opens up your blood vessels causing you to feel hot overheated, and sweat more due to your skin's rise in temperature. it is known as a niacin flush. you can get it from the niacin content in 5-hour energys etc...
- Niacin Information for Consumers
- Niacin Information for Healthcare Professionals (includes dosage details)
- Side Effects of Niacin (detailed)
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