# Jamaican Cerasee (Momordica charantia)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/jamaican-cerasee
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** Adaptogen
**Also Known As:** Momordica charantia, Bitter melon, Wild cerasee, West Indian cerasee, Cerasee tea, Bush tea vine, Wild bitter gourd, Caribbean cerasee, Balsam pear

## Overview

Jamaican Cerasee (Momordica charantia) is a bitter vine whose primary bioactive compounds — charantin, polypeptide-p, and vicine — work together to mimic insulin activity and enhance cellular glucose uptake. These compounds act on GLUT4 translocation and AMP-activated protein kinase (AMPK) pathways to lower [blood glucose](/ingredients/condition/weight-management) levels.

## Health Benefits

• Blood glucose reduction: Animal studies show up to 50% reduction in hyperglycemia after 5 hours in diabetic mice (preliminary evidence)
• Improved glucose tolerance: Chronic oral administration enhanced glucose disposal over 13 days in mice without altering insulin levels (preliminary evidence)
• Fasting glucose control: 400 mg/kg oral extract reduced fasting blood glucose in normal rats (p<0.05, preliminary evidence)
• Anti-hyperglycemic effects: 250 mg/kg showed glucose-lowering effects in type 1-like diabetic rat models via extra-pancreatic mechanisms (preliminary evidence)
• Non-insulin dependent [glucose metabolism](/ingredients/condition/weight-management): Works through pathways independent of insulin secretion, potentially via peripheral glucose uptake (preliminary evidence)

## Mechanism of Action

Charantin, a steroidal glycoside in Momordica charantia, activates AMPK signaling and promotes GLUT4 translocation to cell membranes, increasing peripheral glucose uptake independent of insulin secretion. Polypeptide-p, a plant-derived insulin mimetic, binds insulin receptors and stimulates downstream PI3K/Akt signaling to facilitate glucose disposal. Vicine and other alkaloids may additionally suppress hepatic gluconeogenesis by inhibiting glucose-6-phosphatase enzyme activity.

## Clinical Summary

Animal studies in streptozotocin-induced diabetic mice demonstrated up to 50% reduction in hyperglycemia within 5 hours of oral Cerasee administration, representing preliminary but not clinically validated evidence. Chronic oral administration over 13 days improved glucose tolerance and disposal in mice without significantly altering circulating insulin levels, suggesting peripheral rather than secretagogue mechanisms. Human clinical trials are sparse and methodologically limited, with small sample sizes and short durations, meaning current evidence cannot be directly extrapolated to humans. Overall, the evidence base remains preliminary and larger, well-controlled randomized controlled trials in humans are needed before therapeutic claims can be substantiated.

## Nutritional Profile

Jamaican Cerasee (Momordica charantia) is a bitter vine whose leaves, stems, and fruit contain a diverse array of bioactive compounds. Key bioactive constituents include: charantin (a steroidal glycoside mixture of sitosteryl glucoside and stigmasteryl glucoside, found at approximately 0.1–0.2% dry weight in fruit), momordicin (bitter principle triterpenoid), momordicosides (tetracyclic triterpenoid saponins, particularly momordicoside K and L), and polypeptide-p (an insulin-like peptide found at ~0.4–0.5% in seeds). Vitamins present include vitamin C (approximately 84 mg/100g fresh fruit), vitamin A (as beta-carotene, ~6 µg RAE/100g), folate (~72 µg/100g), and small amounts of vitamin B1 (thiamine ~0.04 mg/100g), B2 (riboflavin ~0.04 mg/100g), and B3 (niacin ~0.4 mg/100g). Minerals include potassium (~296 mg/100g), calcium (~19 mg/100g), phosphorus (~31 mg/100g), magnesium (~17 mg/100g), iron (~0.43 mg/100g), and zinc (~0.8 mg/100g). Macronutrient composition per 100g fresh fruit: carbohydrates ~3.7g (of which dietary fiber ~2.8g, contributing to slowed glucose absorption), protein ~1.0g, fat ~0.17g, water ~94g. Phenolic compounds include gallic acid, caffeic acid, and quercetin derivatives (total phenolics estimated at 150–300 mg GAE/100g fresh weight). Alkaloids including momordicine are present in trace amounts. Bioavailability notes: Charantin absorption is enhanced by lipid co-ingestion due to its steroidal nature; polypeptide-p is subject to proteolytic degradation when taken orally, reducing systemic bioavailability significantly; standardized extracts at 400 mg/kg in animal models have demonstrated measurable hypoglycemic activity, suggesting sufficient oral bioavailability of at least some active fractions. Water-soluble constituents (vitamin C, phenolics) are well-absorbed but sensitive to heat processing.

## Dosage & Preparation

Animal studies used aqueous extract of unripe fruit at 400 mg/kg orally for fasting glucose reduction and 250 mg/kg for anti-hyperglycemic effects. Traditional preparation involves boiling leaves, vines, or unripe fruit to make tea. No human dosage data or standardization available. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Momordica charantia can cause hypoglycemia when combined with antidiabetic medications such as metformin, glipizide, or insulin, requiring careful [blood glucose](/ingredients/condition/weight-management) monitoring and potential dose adjustment. Vicine and convicine in Cerasee seeds can trigger hemolytic anemia in individuals with glucose-6-phosphate dehydrogenase (G6PD) deficiency, making it contraindicated in this population. Cerasee is considered unsafe during pregnancy due to abortifacient properties documented in animal models, and it should be avoided while breastfeeding given insufficient safety data. Common side effects include gastrointestinal distress, abdominal cramping, and diarrhea, particularly with high-dose or concentrated preparations.

## Scientific Research

Current evidence for Jamaican Cerasee is limited to animal studies with no human clinical trials, RCTs, or meta-analyses identified. Studies in mice showed improved glucose tolerance with aqueous extracts (n unspecified per group), while controlled rat studies (n=6 per group) demonstrated significant anti-hyperglycemic effects at 250-400 mg/kg doses. No PubMed PMIDs for human trials on this specific variant were found in the research.

## Historical & Cultural Context

In Jamaican and West Indies folk medicine, cerasee has been used for centuries as a tea for treating diabetes mellitus. Central American traditions similarly employ it for hyperglycemia management, with usage predating modern studies and integrated into traditional bush tea practices.

## Synergistic Combinations

Cinnamon, Chromium, Alpha-lipoic acid, Gymnema sylvestre, Fenugreek

## Frequently Asked Questions

### How does Jamaican Cerasee lower blood sugar?

Jamaican Cerasee lowers blood sugar primarily through charantin and polypeptide-p, which activate AMPK signaling and promote GLUT4 transporter translocation to cell surfaces, increasing glucose uptake in muscle and fat tissue. Polypeptide-p also mimics insulin by binding insulin receptors and activating the PI3K/Akt pathway, while other compounds may suppress glucose production in the liver by inhibiting glucose-6-phosphatase.

### Is Jamaican Cerasee safe to take with diabetes medication?

Combining Jamaican Cerasee with antidiabetic drugs like metformin, sulfonylureas (e.g., glipizide), or insulin poses a significant risk of additive hypoglycemia, as Cerasee independently lowers blood glucose. Anyone on diabetes medication should consult a healthcare provider before use and monitor blood glucose closely, as dose reductions of pharmaceutical agents may be necessary to prevent dangerously low blood sugar levels.

### What is the difference between Cerasee and bitter melon?

Cerasee and bitter melon are both common names for Momordica charantia, the same plant species, and share identical bioactive compounds including charantin, polypeptide-p, and vicine. The term 'Cerasee' is the traditional Caribbean name used in Jamaican folk medicine, where the leaves and vine are typically brewed as a tea, whereas 'bitter melon' more commonly refers to the fruit used in Asian culinary and medicinal traditions.

### Can you drink Cerasee tea every day?

Daily consumption of Cerasee tea is a common practice in Caribbean folk medicine, but there is no established safe daily dose validated by clinical trials in humans. Prolonged daily use carries risks including cumulative hypoglycemia, gastrointestinal irritation, and potential liver stress at high concentrations; individuals with G6PD deficiency face risk of hemolytic episodes from vicine exposure. Most traditional uses involve short-term cycles rather than indefinite daily consumption, and medical supervision is advisable for regular use.

### Is Jamaican Cerasee safe during pregnancy?

Jamaican Cerasee is considered unsafe during pregnancy and should be strictly avoided. Animal studies have documented abortifacient and uterine-stimulating properties linked to compounds in Momordica charantia, and there are insufficient human safety data to override this contraindication. Pregnant individuals should also avoid Cerasee during breastfeeding due to unknown effects on infant health through breast milk exposure.

### What is the most effective form of Jamaican Cerasee — fresh tea, dried leaf, or standardized extract?

Research on Jamaican Cerasee has primarily used oral extracts and dried leaf preparations in animal studies, with the 400 mg/kg extract dose showing significant fasting glucose reduction. Fresh tea and standardized extracts may differ in bioavailability depending on preparation method and concentration of active compounds like momordicin and charantin. Currently, human clinical trials comparing these forms are limited, so the most effective form for practical supplementation remains unclear.

### Who should consider taking Jamaican Cerasee supplementation, and who should avoid it?

Individuals with prediabetes or type 2 diabetes seeking natural glucose support may benefit from Jamaican Cerasee, though animal data suggests potential for glucose management without insulin suppression. People taking blood-glucose-lowering medications, those with a history of liver sensitivity, and individuals with polycystic ovary syndrome (PCOS) should consult a healthcare provider before use. Pregnant and nursing women should avoid supplementation due to insufficient safety data in human populations.

### How strong is the clinical evidence supporting Jamaican Cerasee for blood sugar control in humans?

Current evidence for Jamaican Cerasee is limited to preliminary animal studies showing up to 50% hyperglycemia reduction and improved glucose tolerance without affecting insulin levels. Robust human clinical trials with adequate sample sizes, standardized dosing, and long-term safety monitoring have not yet been published, meaning clinical efficacy in humans remains unproven. While animal data is encouraging, consumers should understand that supplement claims are not yet supported by human clinical evidence.

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