| In addition to caffeine and sugar, each drink has its own particular formula, often a mix of guarana, ginseng, and B-complex vitamins. |
| Plus, some herbal products billed as energy boosters or fat burners contain caffeine-rich herbs such as guarana or stimulants such as ephedra. |
| We lined up for around 45 minutes, and while we were waited, some guy started handing out samples of some guarana herbal extract. |
| Coupled with tyrosine, the caffeine in guarana helps promote muscle performance and neurotransmitter regeneration. |
| To maximize its effectiveness, it is often added to products that also contain caffeine, as well as guarana or mate. |
| About 10 years ago, the family started blending this fruit with banana and a little guarana. |
