Variability in capsaicinoid content and Scoville heat ratings of commercially grown Jalapeño, Habanero and Bhut Jolokia peppers

Summary

This study characterised capsaicinoid content variability in 300 peppers (100 each of Jalapeño, Habanero and Bhut Jolokia) sourced from ten commercial suppliers, with ten peppers per supplier analysed individually. The three varieties exhibited markedly different variability patterns: Habaneros showed consistent within-supplier concentrations with variation driven by supplier differences, Jalapeños showed high within-supplier variability, and Bhut Jolokias displayed skewed distributions. Bootstrap simulations indicated that whilst small samples estimate mean concentrations adequately, a minimum sample size of ten peppers is necessary to capture population variation and the extreme high-heat tail of distributions.

Regional applicability

This study addresses commercial pepper production and variability characterisation with no stated geography; findings are applicable to pepper quality assessment and standardisation across any region where these varieties are commercially grown. The methodology and sample-size recommendations would be relevant to UK food industry quality assurance for imported hot peppers.

Key measures

Capsaicinoid content (concentration and distribution) in individual peppers; Scoville heat ratings; distribution characteristics; within- and between-supplier variation; bootstrap simulation for sample size estimation

Outcomes reported

The study quantified capsaicinoid content variability across three hot pepper varieties (Jalapeño, Habanero, Bhut Jolokia) from multiple commercial suppliers and determined the minimum sample size needed to characterise population heat distribution. Different varieties exhibited distinct variability patterns: Habanero showed normal distribution with variation driven by supplier differences, whilst Jalapeño showed high within-supplier variability and Bhut Jolokia showed skewed distribution.

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