# Dimbula Broken Orange Pekoe (Camellia sinensis)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/dimbula-broken-orange-pekoe
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-24
**Evidence Score:** 2 / 10
**Category:** Tea Cultivars
**Also Known As:** Camellia sinensis, BOPF, Ceylon Black Tea, Dimbula Tea, Orange Pekoe, Sri Lankan Black Tea, Broken Orange Pekoe Fannings

## Overview

Dimbula Broken Orange Pekoe is a high-grade Ceylon black tea from Sri Lanka's Dimbula region containing catechins, theaflavins, and polyphenols. These compounds may help regulate blood sugar levels by enhancing glucose uptake and improving [insulin sensitivity](/ingredients/condition/weight-management).

## Health Benefits

• May support healthy blood sugar levels - animal study showed dose-dependent hypoglycemic effects (evidence: preliminary animal data only)
• Potential antihyperglycemic activity - demonstrated in streptozotocin-induced diabetic rat models (evidence: preliminary animal data)
• May help regulate carbohydrate [digestion](/ingredients/condition/gut-health) - shown to inhibit α-glucosidase and α-amylase enzymes in animal studies (evidence: preliminary)
• Possible insulin-sensitizing effects - exhibited insulinomimetic action in animal models (evidence: preliminary)
• [Antioxidant activity](/ingredients/condition/antioxidant) - demonstrated in vivo antioxidant effects in animal studies (evidence: preliminary)

## Mechanism of Action

The polyphenolic compounds in Dimbula tea, particularly catechins and theaflavins, may enhance glucose uptake by activating glucose transporter proteins in muscle and adipose tissues. These bioactive compounds appear to inhibit alpha-glucosidase and alpha-amylase enzymes, slowing carbohydrate [digestion](/ingredients/condition/gut-health) and reducing post-meal [blood glucose](/ingredients/condition/weight-management) spikes. The antioxidant properties may also protect pancreatic beta cells from [oxidative stress](/ingredients/condition/antioxidant).

## Clinical Summary

Current evidence for Dimbula Broken Orange Pekoe is limited to preliminary animal studies. Research in streptozotocin-induced diabetic rat models demonstrated dose-dependent hypoglycemic effects and potential antihyperglycemic activity. However, no human clinical trials have been conducted specifically on this tea cultivar. The evidence remains preliminary and requires human studies to establish efficacy and optimal dosing protocols.

## Nutritional Profile

Dimbula Broken Orange Pekoe (BOP) is a high-grown Ceylon black tea (elevation ~1,200–1,800 m) from the Dimbula district of Sri Lanka, produced from Camellia sinensis var. sinensis. As a brewed infusion (per 240 mL/8 oz cup, ~2 g dry leaf steeped 3–5 min): **Macronutrients:** Essentially calorie-free (~2 kcal), negligible protein (<0.5 g), negligible fat, negligible carbohydrates (<0.7 g). **Caffeine:** Approximately 40–70 mg per cup; BOP grade (smaller broken leaf) tends toward higher extraction (~50–70 mg) compared to whole-leaf grades due to increased surface area. **Polyphenols (total):** ~150–250 mg per cup. Key bioactive compounds include: • **Theaflavins** (TF-1, TF-2a, TF-2b, TF-3): ~10–30 mg per cup; formed during oxidation/fermentation, responsible for briskness and astringency characteristic of Dimbula teas; exhibit antioxidant, [anti-inflammatory](/ingredients/condition/inflammation), and enzyme-inhibitory (α-glucosidase, α-amylase) activity. • **Thearubigins:** ~50–120 mg per cup; polymeric polyphenols contributing to color and body; partial [antioxidant activity](/ingredients/condition/antioxidant) though lower bioavailability than theaflavins. • **Residual catechins:** ~10–30 mg per cup (lower than green tea due to oxidation); includes epigallocatechin gallate (EGCG, ~2–8 mg), epicatechin gallate (ECG), epicatechin (EC), and epigallocatechin (EGC). • **Flavonol glycosides:** Quercetin (~2–5 mg), kaempferol (~1–3 mg), and myricetin glycosides (~0.5–2 mg). **L-Theanine:** ~15–30 mg per cup; an amino acid unique to tea contributing to umami and [cognitive](/ingredients/condition/cognitive) relaxation effects; bioavailability is high (~>90% absorbed). **Minerals (per cup):** • Potassium: ~80–100 mg • Manganese: ~0.4–0.5 mg (~20–25% DV; notably high, with good bioavailability) • Magnesium: ~5–8 mg • Fluoride: ~0.1–0.3 mg (varies with soil; Sri Lankan highland teas tend toward lower fluoride) • Zinc: ~0.02–0.05 mg • Chromium: trace amounts. **Vitamins:** Minimal; trace amounts of B-group vitamins (riboflavin ~0.01 mg, folate ~5–10 µg). **Other bioactive compounds:** • Gallic acid: ~5–15 mg per cup; simple phenolic acid with antioxidant properties. • Caffeoylquinic acids (chlorogenic acids): ~1–5 mg. • Volatile aroma compounds: Dimbula BOP is noted for its characteristic 'malty-citrus' aromatic profile with linalool, geraniol, methyl salicylate, and β-ionone contributing to flavor. **Bioavailability notes:** Theaflavins have moderate bioavailability (~5–10% absorption); they undergo extensive gut microbial [metabolism](/ingredients/condition/weight-management) producing smaller phenolic metabolites (e.g., 3-(3-hydroxyphenyl)propionic acid) which may account for systemic biological effects. Catechins (especially EGCG) have low oral bioavailability (~1–5%) due to instability at intestinal pH and extensive first-pass metabolism. The BOP broken-leaf grade enhances overall extraction efficiency of polyphenols and caffeine by 15–30% compared to whole-leaf OP grades. Oxalate content is moderate (~5–15 mg per cup), which may slightly reduce calcium and iron absorption if consumed concurrently with meals. Tannin content (~30–60 mg per cup) can inhibit non-heme iron absorption by ~50–70%.

## Dosage & Preparation

Animal studies used warm black tea infusions at concentrations of 60, 120, and 480 mg/ml with dose-dependent effects observed. No standardized human dosage recommendations exist for Dimbula BOPF. Standard tea consumption of 3-5 cups daily may apply, but therapeutic dosing has not been established in human studies. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Dimbula Broken Orange Pekoe is generally safe for most adults when consumed as a beverage. However, it contains caffeine (30-50mg per cup) which may cause jitters, [insomnia](/ingredients/condition/sleep), or anxiety in sensitive individuals. The tea may interact with anticoagulant medications due to vitamin K content and could enhance hypoglycemic effects of diabetes medications. Pregnant and breastfeeding women should limit intake due to caffeine content.

## Scientific Research

Research is limited to animal studies, with no human clinical trials available for Dimbula BOPF specifically. A study published in the Journal of Ethnopharmacology (2011, PMID: 21397000) examined Sri Lankan BOPF grade black tea in rat models, finding significant dose-dependent effects on [glucose metabolism](/ingredients/condition/weight-management). The study confirmed the tea was nontoxic in tested animal models but human clinical validation is lacking.

## Historical & Cultural Context

While Sri Lankan tea has an established history in traditional use, specific documentation of Dimbula BOPF's traditional medicinal applications was not found in available sources. The modern research on BOPF grade tea suggests traditional use may have targeted metabolic and glycemic regulation, though explicit historical records are lacking.

## Synergistic Combinations

Green tea extract, chromium, cinnamon extract, gymnema sylvestre, alpha-lipoic acid

## Frequently Asked Questions

### How much caffeine is in Dimbula Broken Orange Pekoe tea?

Dimbula Broken Orange Pekoe contains approximately 30-50mg of caffeine per 8-ounce cup. This is roughly half the caffeine content of coffee but higher than most green teas due to the full oxidation process used in black tea production.

### What makes Dimbula tea different from other Ceylon teas?

Dimbula tea is grown at high altitudes (3,500-5,500 feet) in Sri Lanka's Dimbula region, giving it a distinctive bright, citrusy flavor profile. The cool climate and monsoon patterns create unique polyphenol concentrations that may differ from other Ceylon tea regions.

### Can Dimbula tea help with diabetes management?

Preliminary animal studies suggest Dimbula tea may help regulate blood sugar levels through its catechin and polyphenol content. However, human clinical trials are needed to confirm these effects, and it should not replace prescribed diabetes medications.

### What is the best way to brew Dimbula Broken Orange Pekoe?

Steep 1 teaspoon of loose leaf tea in 8 ounces of boiling water (212°F) for 3-5 minutes. This brewing method optimizes extraction of beneficial polyphenols while preventing excessive tannin release that can cause bitterness.

### Are there any side effects from drinking Dimbula tea daily?

Daily consumption is generally safe for most adults, but excessive intake may cause caffeine-related side effects like restlessness, rapid heartbeat, or sleep disruption. Limit intake to 3-4 cups daily and avoid consumption late in the day to prevent sleep interference.

### What does the research evidence show about Dimbula tea's effects on blood sugar?

Current evidence for Dimbula tea's blood sugar benefits comes primarily from animal studies using diabetic rat models, which showed dose-dependent hypoglycemic effects and α-glucosidase inhibition. While these preliminary findings are promising, human clinical trials are needed to confirm whether these effects translate to meaningful blood sugar support in people. The available research suggests potential antihyperglycemic activity, but the evidence quality remains preliminary rather than conclusive.

### Is Dimbula Broken Orange Pekoe safe for people taking diabetes medications?

Since Dimbula tea may have blood sugar-lowering properties based on animal studies, it could potentially interact with diabetes medications, though this has not been formally studied in humans. Anyone taking medications like metformin, sulfonylureas, or insulin should consult their healthcare provider before regularly consuming Dimbula tea to avoid the risk of low blood sugar. Medical supervision is especially important when combining any blood sugar-supportive ingredient with prescription antidiabetic drugs.

### Who would benefit most from drinking Dimbula Broken Orange Pekoe tea?

Dimbula tea may be of interest to individuals looking for dietary sources of polyphenols and compounds that support carbohydrate metabolism, based on its enzyme-inhibiting properties shown in animal research. People seeking a flavorful Ceylon tea variant with potential metabolic benefits may find it appealing, though those with prediabetes or diabetes should prioritize medical advice over self-supplementation. The preliminary evidence suggests it may complement—not replace—established dietary and lifestyle approaches to blood sugar management.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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