# Koshun Green Tea (Camellia sinensis) **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/koshun-green-tea **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-31 **Evidence Score:** 2 / 10 **Category:** Tea **Also Known As:** Camellia sinensis var. sinensis (Koshun cultivar), Koshun Cultivar Green Tea, Japanese Koshun Tea, Uji Koshun Green Tea, Koshun Cha ## Overview Koshun green tea is a specific cultivar of Camellia sinensis grown in Japan that contains catechins like EGCG and caffeine. No clinical studies have specifically evaluated this cultivar's health effects, distinguishing it from general green tea research. ## Health Benefits • No specific health benefits documented - no human clinical trials, RCTs, or meta-analyses exist for Koshun cultivar • General green tea benefits cannot be attributed to this specific variant without cultivar-specific evidence • No PubMed-indexed studies identify health outcomes for Koshun Green Tea • Cultivar-specific chemical profiles and biological effects remain unstudied • Evidence quality: Absent - no clinical data available for this cultivar ## Mechanism of Action Like other green tea cultivars, Koshun contains epigallocatechin gallate (EGCG) which may inhibit matrix metalloproteinases and activate AMP-activated protein kinase pathways. The caffeine content acts as an adenosine receptor antagonist, potentially affecting central nervous system stimulation. However, these mechanisms are extrapolated from general green tea research rather than Koshun-specific studies. ## Clinical Summary No human clinical trials, randomized controlled trials, or meta-analyses have specifically investigated Koshun green tea cultivar for health outcomes. PubMed searches yield no studies examining this particular variety's efficacy or safety profile. While general green tea research demonstrates various health benefits, these findings cannot be directly attributed to Koshun without cultivar-specific evidence. The lack of research represents a significant gap in understanding this specific tea variety's therapeutic potential. ## Nutritional Profile {"macronutrients": {"protein": "0.2g per 100ml brewed tea", "fiber": "Negligible", "carbohydrates": "0g per 100ml brewed tea", "fats": "0g per 100ml brewed tea"}, "micronutrients": {"vitamin_C": "Trace amounts", "vitamin_K": "Trace amounts", "potassium": "8mg per 100ml brewed tea", "calcium": "0.5mg per 100ml brewed tea", "magnesium": "1mg per 100ml brewed tea"}, "bioactive_compounds": {"catechins": "30-50mg per 100ml brewed tea", "caffeine": "20-30mg per 100ml brewed tea", "L-theanine": "4-8mg per 100ml brewed tea"}, "bioavailability_notes": "The bioavailability of catechins and other polyphenols can be influenced by factors such as brewing time, temperature, and the presence of other dietary components. Caffeine and L-theanine are generally well-absorbed."} ## Dosage & Preparation No clinically studied dosage ranges are available for Koshun Green Tea in extract, powder, or standardized forms, as no human trials have been conducted on this specific cultivar. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Safety data specific to Koshun green tea is unavailable due to lack of clinical research on this cultivar. General green tea safety profiles suggest potential interactions with anticoagulant medications due to vitamin K content and possible iron absorption interference from tannins. Caffeine content may cause [insomnia](/ingredients/condition/sleep), anxiety, or digestive upset in sensitive individuals. Pregnant women should limit caffeine intake, though Koshun-specific pregnancy safety data does not exist. ## Scientific Research No human clinical trials, randomized controlled trials, or meta-analyses have been conducted on Koshun Green Tea cultivar specifically. While general Camellia sinensis green tea studies exist, none identify or isolate effects of the Koshun variant, and no PubMed PMIDs are available for this cultivar. ## Historical & Cultural Context Koshun is a modern Japanese cultivar without documented traditional use history. While Camellia sinensis originated in China approximately 3,000 years ago and spread to Japan during the Tang Dynasty (618-907 AD), Koshun represents recent selective breeding efforts rather than historical cultivation. ## Synergistic Combinations No synergistic ingredients documented for Koshun cultivar ## Frequently Asked Questions ### What is Koshun green tea? Koshun green tea is a specific cultivar of Camellia sinensis developed in Japan. It contains typical green tea compounds like EGCG and caffeine but has not been studied independently from other green tea varieties. ### Are there any studies on Koshun green tea benefits? No clinical studies have specifically examined Koshun green tea for health benefits. All available research focuses on general green tea or other specific cultivars, not the Koshun variety. ### How much caffeine does Koshun green tea contain? Specific caffeine content data for Koshun green tea is not available in published literature. Green tea generally contains 25-50mg of caffeine per cup, but Koshun's exact levels have not been measured in peer-reviewed studies. ### Is Koshun green tea safe to drink daily? While general green tea is considered safe for most people, no safety studies exist specifically for Koshun cultivar. Standard green tea precautions regarding caffeine sensitivity and drug interactions would likely apply. ### What makes Koshun different from other green teas? Koshun is a distinct Japanese cultivar with potentially unique growing characteristics and flavor profiles. However, no research has identified specific compositional or bioactive differences compared to other green tea varieties. ### Can I get Koshun green tea from food sources, or is it only available as a supplement? Koshun green tea is primarily available as a brewed tea product rather than a concentrated supplement, as it is a specific cultivar grown in Japan. You can obtain it by purchasing loose-leaf or bagged Koshun tea from specialty tea retailers or online suppliers, making it accessible as a food beverage rather than a typical dietary supplement. This form allows you to consume it in its whole-plant state, though cultivar-specific bioavailability data is not established in scientific literature. ### Is Koshun green tea safe for children and elderly individuals? General green tea safety profiles suggest it is typically well-tolerated across age groups, but Koshun-specific safety data in children and elderly populations has not been studied. Considerations such as caffeine sensitivity in children and potential interactions with medications in elderly individuals should follow general green tea guidance rather than cultivar-specific recommendations. Consulting a healthcare provider is advisable before introducing any new tea or supplement to vulnerable populations. ### Does Koshun green tea interact with common medications? No Koshun-specific drug interaction studies exist; however, green tea in general may interact with certain medications including blood thinners, blood pressure medications, and stimulant drugs due to its caffeine and catechin content. Individual responses depend on medication type, dosage, and consumption frequency rather than on the Koshun cultivar itself. Consulting with a pharmacist or physician before regular consumption is recommended if you take prescription medications. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*