Impact of Consumption of Cowpea Leaves on Blood Glucose

Intake of foods high in carbohydrates causes a spike in glucose in the blood. Repeated high blood glucose spikes are associated with an increased risk of diabetes. Polyphenols, which are abundant in vegetables, may influence how the body utilises carbohydrates. Cowpea, also referred to as black-eyed peas (Vigna unguiculata (L.) Walp.) leaves, contain polyphenols and fibre that can help regulate blood glucose.The study will be an acute, single-blind, randomised control trial with a cross-over design involving healthy black participants aged ≥18 years. This clinical trial aims to investigate if consuming cowpea leaves can reduce blood glucose spikes after consuming a meal high in carbohydrates. Participants will be randomised to consume either bread with jam containing freeze-dried cowpea leaves (active intervention) or jam without any freeze-dried powder (control group). Blood glucose will be monitored before the intervention and every 15 minutes after the intervention using a continuous glucose monitor.

Inclusion Criteria:Adults aged ≥ 18 yearsParticipants from Black, Black British, Caribbean or African ethnic backgrounds,which includes: Caribbean, African, Any other Black, Black British, or Caribbean backgroundShould be able to give informed consentShould be willing to provide GP's contact detailsExclusion Criteria:Pregnant or lactating mothersSpecial dietary requirements such as vegetarians and vegansParticipants who are on a specialised diet such as a weight reduction dietHaving any chronic illness or taking medication for chronic illnessParticipants whose blood results indicate illnessParticipants on mediation for hypertension or hyperlipidaemiaSportsmen or women or vigorous exercise for more than 5 times per weekAlcohol (more than 14 units per week) or drug abusers.