# Sumatra Robusta (Coffea canephora 'Sumatra Robusta')

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/sumatra-robusta
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** Coffee Cultivars
**Also Known As:** Coffea canephora 'Sumatra Robusta', Sumatra Robusta Coffee, Indonesian Robusta, North Sumatra Robusta, Robusta Sumatra, Sumatran Coffee Bean Extract

## Overview

Sumatra Robusta (Coffea canephora 'Sumatra Robusta') is a high-caffeine Robusta coffee cultivar whose bean and peel extracts are rich in chlorogenic acids, trigonelline, and polyphenols. These bioactives stimulate dermal fibroblast [collagen synthesis](/ingredients/condition/skin-health) and exert antibacterial activity against gram-positive pathogens.

## Health Benefits

• Skin [collagen production](/ingredients/condition/skin-health): Topical bean extract increased collagen up to 91.3% in UV-damaged skin (animal study, n=30 rats)
• Skin hydration: Topical application improved hydration up to 86.09% after 4 weeks (animal study, n=30 rats)
• Antibacterial activity: Peel/seed extracts inhibited S. aureus and B. cereus growth with MIC 2-4 mg/mL (in vitro study)
• Biofilm prevention: Extracts reduced biofilm formation by 39-56% and eliminated up to 92% of mature biofilms (in vitro study)
• Gingival health: Oral husk extract increased fibroblasts and collagen density in gum tissue (animal study, n=30 rats)

## Mechanism of Action

Chlorogenic acids in Sumatra Robusta extract inhibit matrix metalloproteinases (MMP-1, MMP-3) that degrade collagen in UV-exposed skin, while simultaneously upregulating TGF-β1 signaling to promote Type I and III [collagen synthesis](/ingredients/condition/skin-health) in dermal fibroblasts. Caffeine and polyphenols scavenge [reactive oxygen species](/ingredients/condition/antioxidant) (ROS), reducing oxidative stress-induced lipid peroxidation in the stratum corneum, which supports skin barrier integrity and moisture retention. Peel and seed phenolic compounds disrupt S. aureus cell membrane integrity by targeting bacterial phospholipid bilayers, contributing to the observed antibacterial activity.

## Clinical Summary

Current evidence for Sumatra Robusta is limited to a single preclinical animal study (n=30 Wistar rats) using topical bean extract on UV-damaged skin, which demonstrated collagen increases up to 91.3% and hydration improvements up to 86.09% over 4 weeks. Antibacterial effects against Staphylococcus aureus have been demonstrated in vitro using peel and seed extracts. No human randomized controlled trials have been published for this specific cultivar, so efficacy and optimal dosing in humans remain unestablished. The existing data is promising for topical cosmetic applications but cannot yet be extrapolated to oral supplementation or clinical dermatological use.

## Nutritional Profile

**Macronutrients (per 100g green beans, approximate):** Protein: 12–15g (primarily albumins and globulins); Lipids: 8–12g (predominantly linoleic acid ~40%, palmitic acid ~30%, oleic acid ~10%; higher total fat than many Arabica cultivars); Carbohydrates: 35–45g (sucrose 3–5g, notably lower than Arabica; polysaccharides including galactomannans ~15–20g, arabinogalactans ~10–14g); Dietary fiber: 30–35g (largely insoluble cellulose and hemicellulose); Moisture: 10–12g. **Bioactive Compounds:** Caffeine: 1.7–3.5% dry weight (significantly higher than Arabica's 0.8–1.5%); Chlorogenic acids (CGAs): 7–14% dry weight (predominantly 5-caffeoylquinic acid/5-CQA, with substantial 3-CQA, 4-CQA, 3,5-diCQA, and feruloylquinic acids; Robusta generally contains 30–50% more total CGAs than Arabica); Trigonelline: 0.6–0.9% dry weight; Diterpenes (cafestol: 0.2–0.6%, kahweol: trace to negligible — Robusta is notably low in kahweol compared to Arabica); Melanoidins (formed during roasting): 15–25% of roasted bean dry weight. **Micronutrients (per 100g green beans):** Potassium: 1,500–2,000mg; Magnesium: 180–250mg; Phosphorus: 150–200mg; Calcium: 80–130mg; Iron: 5–10mg; Zinc: 3–6mg; Manganese: 2–5mg; Niacin (vitamin B3): 15–30mg; Riboflavin (B2): 0.7–1.0mg; Thiamine (B1): trace amounts. **Amino Acid Profile:** Rich in glutamic acid, aspartic acid, and leucine; moderate levels of lysine and arginine. **Phenolic & [Antioxidant](/ingredients/condition/antioxidant) Notes:** Total polyphenol content is among the highest of commercial coffee cultivars; ORAC values for green Robusta extracts range approximately 2,500–3,500 µmol TE/g. Sumatran Robusta beans tend to show elevated CGA concentrations attributed to the wet-hulled (Giling Basah) processing method common in the region, which preserves more phenolic integrity. **Bioavailability Notes:** Chlorogenic acids have approximately 33% oral bioavailability in humans, largely absorbed in the small intestine and metabolized to caffeic acid and ferulic acid by gut microbiota; caffeine is nearly 99% bioavailable with rapid absorption (Tmax ~30–45 min); magnesium and potassium are moderately bioavailable from brewed coffee (~20–30% absorption); diterpene content in brewed coffee depends heavily on preparation method (unfiltered/boiled methods retain cafestol; paper filtration removes >80%); melanoidins may act as dietary fiber analogs and serve as carriers enhancing mineral bioavailability in the colon.

## Dosage & Preparation

Topical: 2.5-10% bean extract cream applied twice daily (highest efficacy at 10%). Oral: 125-500 mg/kg body weight husk extract daily (250 mg/kg optimal in animal studies). In vitro antibacterial: 2-4 mg/mL minimum inhibitory concentration. No human dosage data available. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Topical coffee bean extracts are generally well-tolerated in preclinical models, but individuals with known coffee or latex allergies may experience contact dermatitis due to cross-reactive proteins. Oral Robusta coffee extracts contain higher caffeine concentrations than Arabica (approximately 2.7% vs. 1.5% dry weight), increasing risk of caffeine-related side effects such as tachycardia, [insomnia](/ingredients/condition/sleep), and hypertension, particularly when combined with stimulant medications or MAO inhibitors. Chlorogenic acids may modestly reduce glucose absorption and potentiate hypoglycemic agents, warranting caution in diabetic individuals on metformin or insulin. Safety during pregnancy and lactation has not been evaluated for this specific cultivar's extract; standard caffeine limits (under 200 mg/day) should be observed.

## Scientific Research

No human clinical trials specific to Sumatra Robusta were identified; evidence is limited to preclinical animal and in vitro studies. Animal studies include topical application in 30 female Wistar rats showing dose-dependent increases in skin collagen and hydration, and oral administration in 30 male rats demonstrating increased gingival fibroblasts. One study on unspecified Robusta coffee (PMID: 29654498) showed improved attention and [memory](/ingredients/condition/cognitive) in humans.

## Historical & Cultural Context

No evidence of historical or traditional medicinal use specific to Sumatra Robusta was identified in any traditional medicine systems. It is primarily noted as an Indonesian plant for cosmetic and [antioxidant](/ingredients/condition/antioxidant) applications in modern contexts.

## Synergistic Combinations

Green tea extract, vitamin C, hyaluronic acid, collagen peptides, resveratrol

## Frequently Asked Questions

### How much can Sumatra Robusta extract increase skin collagen?

In a preclinical study of 30 rats with UV-damaged skin, topical application of Sumatra Robusta bean extract increased dermal collagen levels by up to 91.3% compared to untreated controls. This effect is attributed primarily to chlorogenic acids inhibiting collagen-degrading MMP enzymes and upregulating TGF-β1-mediated collagen synthesis. These results are from an animal model and human clinical confirmation is not yet available.

### Is Sumatra Robusta the same as regular Robusta coffee?

Sumatra Robusta refers specifically to Coffea canephora cultivars grown in Sumatra, Indonesia, which may exhibit distinct phytochemical profiles—including chlorogenic acid and caffeine content—compared to Robusta grown in Africa or Vietnam due to differences in soil, altitude, and processing methods. While all Robusta coffee shares higher caffeine content than Arabica (roughly 2.7% vs. 1.5% dry weight), geographic origin can influence the concentration of bioactive polyphenols relevant to health applications. Research isolating the Sumatra-grown variant specifically is limited.

### Does Sumatra Robusta extract improve skin hydration?

Yes, in the same 30-rat preclinical study, topical Sumatra Robusta bean extract improved skin hydration by up to 86.09% after 4 weeks of application on UV-damaged skin. The mechanism likely involves polyphenol-mediated reduction of oxidative damage to stratum corneum lipids, improving barrier function and transepidermal water retention. Human trials validating this hydration benefit have not yet been conducted.

### What bacteria does Sumatra Robusta extract fight?

In vitro studies show that extracts from the peel and seed of Sumatra Robusta coffee inhibit Staphylococcus aureus, a gram-positive bacterium responsible for skin infections, wound infections, and food contamination. The antibacterial mechanism is attributed to phenolic compounds and chlorogenic acids that disrupt bacterial cell membrane integrity. Minimum inhibitory concentrations and comparative efficacy against other pathogens have not been fully characterized for this specific cultivar.

### Can you take Sumatra Robusta extract as a supplement orally?

There is currently no clinical evidence establishing an effective oral dose of Sumatra Robusta extract for health benefits; all published research uses topical application. Because Robusta beans contain approximately 2.7% caffeine by dry weight—roughly twice that of Arabica—oral supplementation carries a higher risk of caffeine-related adverse effects including elevated heart rate, anxiety, and disrupted sleep. Individuals sensitive to caffeine, or those taking stimulants, antihypertensives, or blood sugar medications, should consult a healthcare provider before using Robusta-based oral supplements.

### What is the difference between Sumatra Robusta topical application and oral supplementation for skin benefits?

Topical Sumatra Robusta extract delivers active compounds directly to skin layers, producing significant results like 91.3% collagen increase and 86.09% hydration improvement in animal studies. Oral supplementation follows different absorption pathways through the digestive system and may have reduced bioavailability for skin-specific benefits compared to direct topical application. The choice depends on whether you seek localized skin effects (topical) or systemic antioxidant support (oral).

### Is Sumatra Robusta extract safe for sensitive or compromised skin?

While animal studies show Sumatra Robusta extracts improve skin health and fight bacteria like S. aureus, safety in sensitive or damaged skin requires caution and patch testing first. The antibacterial properties (MIC 2-4 mg/mL) suggest efficacy against common skin pathogens, but individual reactions vary based on skin condition and extract concentration. Consult a dermatologist before use if you have active inflammation, open wounds, or known sensitivities to coffee plant compounds.

### How does Sumatra Robusta's biofilm-inhibiting ability relate to skin health?

Sumatra Robusta extracts reduce bacterial biofilm formation, which is clinically relevant because biofilms protect pathogens from antimicrobial agents and immune defenses on skin. This dual action—direct antimicrobial activity plus biofilm disruption—makes the ingredient potentially more effective against persistent skin bacteria than simple antimicrobials alone. This mechanism supports use in products targeting acne, infections, or compromised skin barriers where biofilm-forming bacteria are problematic.

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