# Colombian San Agustin (Coffea arabica 'San Agustin')

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/colombian-san-agustin
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-24
**Evidence Score:** 2 / 10
**Category:** Coffee Cultivars
**Also Known As:** Coffea arabica 'San Agustin', San Agustin Coffee, Colombian Huila Coffee, San Agustin Arabica, Huila San Agustin, Colombian Specialty Coffee, San Agustin Cultivar

## Overview

Colombian San Agustin is a specialty Coffea arabica cultivar grown in the Huila region of Colombia, characterized by elevated chlorogenic acids and polyphenolic compounds that drive its antioxidant and [neuroprotective](/ingredients/condition/cognitive) properties. Its primary bioactive constituents, including chlorogenic acids and caffeine metabolites, exert effects through [free radical scaveng](/ingredients/condition/antioxidant)ing and [mitochondrial](/ingredients/condition/energy) membrane stabilization in neuronal cells.

## Health Benefits

• [Antioxidant activity](/ingredients/condition/antioxidant) demonstrated in vitro through ABTS radical scavenging (up to 59.85% inhibition at 1000 μg/mL) - preliminary evidence only
• Neuronal cell protection shown in PC12 cells against H2O2-induced damage with dose-dependent reduction in LDH release - in vitro evidence only
• Potential source of chlorogenic acids and phenolic compounds (12.5-127 mg gallic acid equivalents/g in Colombian coffees) - no human studies
• May contribute to dietary antioxidant intake based on population exposure studies - no clinical endpoints measured
• Contains ferric reducing antioxidant power (FRAP) activity in laboratory testing - human clinical evidence lacking

## Mechanism of Action

Chlorogenic acids in San Agustin extract, particularly 5-caffeoylquinic acid (5-CQA), donate hydrogen atoms to neutralize [reactive oxygen species](/ingredients/condition/antioxidant) including ABTS radicals, directly reducing oxidative stress at the cellular level. In PC12 neuronal cell models, the extract attenuates hydrogen peroxide-induced cytotoxicity by stabilizing [mitochondrial](/ingredients/condition/energy) membrane potential and inhibiting downstream caspase activation pathways. Additionally, polyphenolic metabolites may upregulate endogenous antioxidant enzymes such as superoxide dismutase (SOD) and catalase, reinforcing intracellular redox homeostasis.

## Clinical Summary

Available evidence for Colombian San Agustin extract is limited exclusively to in vitro studies, with no published human clinical trials or animal intervention studies identified to date. [Antioxidant activity](/ingredients/condition/antioxidant) was measured via ABTS radical scavenging assay, achieving up to 59.85% inhibition at a concentration of 1000 μg/mL, representing preliminary dose-response data only. [Neuroprotective effect](/ingredients/condition/cognitive)s were demonstrated in PC12 rat pheochromocytoma cells exposed to hydrogen peroxide, where the extract produced a statistically significant, dose-dependent reduction in lactate dehydrogenase (LDH) release, a marker of membrane damage and cell death. These findings are hypothesis-generating and cannot be extrapolated to human health outcomes without controlled clinical trials.

## Nutritional Profile

Colombian San Agustín green coffee beans contain approximately 10-13% moisture, 10-13% protein (primarily storage proteins and enzymes), 15-18% lipids concentrated in the coffee oil fraction (rich in diterpenes cafestol and kahweol at ~10-15 mg/g lipid fraction), and 55-65% carbohydrates (including ~30-40% polysaccharides such as galactomannans and arabinogalactans, plus ~8% sucrose in green beans which degrades significantly upon roasting). Crude fiber content ranges from 3-4%. Chlorogenic acids (CGAs) are the dominant bioactive compounds, quantified at 12.5-127 mg gallic acid equivalents per gram in Colombian arabica varieties, with primary CGAs being 5-caffeoylquinic acid (5-CQA, typically 5-9% dry weight in green beans), 3-CQA, 4-CQA, and dicaffeoylquinic acid isomers. Trigonelline content is approximately 0.6-1.2% dry weight in arabica, serving as a niacin precursor upon roasting. Caffeine content in arabica San Agustín is estimated at 0.8-1.4% dry weight (lower than robusta). Mineral profile includes potassium (~1600-2000 mg/100g dry), magnesium (~150-200 mg/100g), calcium (~100-130 mg/100g), manganese (~1-2 mg/100g), and trace iron and zinc. Niacin (B3) is generated de novo during roasting from trigonelline degradation (~10-40 mg/100g roasted). Bioavailability of CGAs is moderate (estimated 30-72% absorption in humans from brewed coffee), though matrix effects, roast degree, and individual [gut microbiome](/ingredients/condition/gut-health) composition significantly influence CGA bioavailability; cafestol and kahweol are largely retained in unfiltered preparations but removed by paper filtration. [Antioxidant](/ingredients/condition/antioxidant) capacity measured by ABTS radical scavenging reaches up to 59.85% inhibition at 1000 μg/mL in vitro, attributed primarily to CGA and phenolic content.

## Dosage & Preparation

No clinically studied dosage ranges exist for Colombian San Agustin due to absence of human trials. In vitro studies used ethanol extracts at 125-1000 μg/mL for laboratory assays only. General Colombian coffee samples showed varying [antioxidant](/ingredients/condition/antioxidant) capacity without dosage recommendations. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

As a Coffea arabica-derived extract, San Agustin contains caffeine, which may cause [insomnia](/ingredients/condition/sleep), tachycardia, hypertension, and anxiety at elevated doses, particularly in caffeine-sensitive individuals. Chlorogenic acids can modestly inhibit glucose absorption and may potentiate the effects of antidiabetic medications, requiring blood sugar monitoring. Concurrent use with stimulant drugs, MAO inhibitors, or anticoagulants such as warfarin warrants caution due to potential pharmacokinetic interactions involving cytochrome P450 enzymes. Pregnant and breastfeeding individuals should limit caffeine-containing products to under 200 mg caffeine per day per general obstetric guidelines; no specific safety data exists for this cultivar's extract.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses specific to Colombian San Agustin were identified. Available evidence is limited to in vitro studies on general Colombian Coffea arabica, including [antioxidant](/ingredients/condition/antioxidant) capacity evaluations in 58 commercial samples (PMID: 27173548) and neuronal cell protective effects using ethanol extracts (PMC3867146). A population exposure study assessed dietary intake in 725 subjects but reported no clinical endpoints (PMID: 40351494).

## Historical & Cultural Context

No evidence of Colombian San Agustin in formal traditional medicine systems was found; it is primarily a modern specialty coffee cultivar from Colombia's coffee-growing regions. Coffee cultivation in Colombia has historical ties to local agricultural practices rather than medicinal use. The cultivar represents contemporary coffee production rather than traditional therapeutic applications.

## Synergistic Combinations

Green tea extract, vitamin C, N-acetylcysteine, alpha-lipoic acid, quercetin

## Frequently Asked Questions

### What is Colombian San Agustin coffee extract and how is it different from regular coffee?

Colombian San Agustin refers specifically to a Coffea arabica cultivar grown in the San Agustin municipality of Huila, Colombia, a high-altitude region known for producing beans with elevated chlorogenic acid concentrations compared to commodity arabica varieties. Unlike standard coffee consumed as a beverage, research on this cultivar focuses on standardized polyphenol-rich extracts evaluated for bioactive properties in controlled laboratory settings rather than as a dietary beverage.

### What does the ABTS assay result of 59.85% inhibition actually mean for antioxidant strength?

The ABTS (2,2'-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging assay measures a compound's ability to donate electrons or hydrogen atoms to a synthetic radical chromogen, with higher inhibition percentages indicating stronger antioxidant capacity. A result of 59.85% inhibition at 1000 μg/mL means that at that concentration, the San Agustin extract neutralized roughly 60% of the ABTS radicals present, a moderate-to-strong result in this assay, though in vitro antioxidant values do not directly predict bioavailability or clinical efficacy in humans.

### Can Colombian San Agustin extract protect brain cells from damage?

In vitro evidence using PC12 cells, a rat-derived neuronal cell line commonly used to model oxidative stress, shows that San Agustin extract reduces LDH release caused by hydrogen peroxide in a dose-dependent manner, indicating reduced cell membrane rupture and cell death. However, these are cell culture experiments and do not confirm blood-brain barrier penetration, effective dosing in humans, or clinical neuroprotection; no human or animal studies have yet been conducted on this specific cultivar.

### What are the main bioactive compounds in San Agustin Coffea arabica extract?

The primary bioactive compounds are chlorogenic acids, especially 5-caffeoylquinic acid (5-CQA) and related isomers, which account for the majority of the extract's measured antioxidant activity. Additional contributors include caffeine, trigonelline, ferulic acid, and melanoidins formed during roasting, all of which interact with oxidative and inflammatory pathways at varying potencies depending on extraction method and roast level.

### Is there a recommended dosage for Colombian San Agustin coffee extract supplements?

No clinically validated dosage has been established for Colombian San Agustin extract because no human pharmacokinetic or efficacy trials have been published. The in vitro studies used concentrations of up to 1000 μg/mL, which are laboratory measurements that do not translate directly into oral supplement doses. Any commercial product should be evaluated based on its standardized chlorogenic acid content and total polyphenol concentration, and dosing guidance from a qualified healthcare provider is recommended.

### How does Colombian San Agustin compare to other Coffea arabica cultivars in terms of antioxidant content?

Colombian San Agustin demonstrates antioxidant activity up to 59.85% inhibition in ABTS radical scavenging assays, though direct comparative studies with other arabica cultivars are limited. The phenolic compound concentration (12.5-127 mg gallic acid equivalents/g) suggests competitive antioxidant potential, but regional growing conditions and processing methods also significantly influence final antioxidant profiles across cultivars. More standardized comparative research is needed to definitively rank San Agustin against other Colombian or international arabica varieties.

### What is the current strength of evidence for Colombian San Agustin's health benefits?

Current evidence for Colombian San Agustin is primarily preliminary, based on in vitro laboratory studies using isolated cell cultures (PC12 neuronal cells) and chemical assays rather than human clinical trials. While the demonstrated dose-dependent protection against oxidative stress in cell models is promising, in vitro results do not guarantee the same effects will occur in the human body. Additional research including bioavailability studies and human trials would be necessary to establish clinically meaningful health claims.

### Is Colombian San Agustin extract safe for people taking blood pressure or heart medications?

Coffea arabica extracts contain caffeine and chlorogenic acids, compounds known to potentially affect blood pressure and interact with cardiovascular medications, though specific safety data for Colombian San Agustin cultivar is not well-documented. Individuals taking antihypertensive or cardiac medications should consult their healthcare provider before supplementing with concentrated coffee extracts. Standard coffee consumption is generally recognized as safe for most people on such medications, but supplement-level concentrations warrant medical oversight.

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