7 Pot Brain Strain Red (C. chinense) is a delicious, extremely hot pepper. It is probably among the hottest. This pepper features lots of “brain” dimpling, and turns a deep red when ripe – some even have little tails like the Primo. The Brain Strain and Primo peppers are believed to be closely related to the Trinidad Moruga Scorpion. Scoville ratings for the Brain Strain are purportedly between 1.5 – 2 million SHU. A favorite pepper for making nuclear powder and hot sauce. Grow with caution!