# Job's Tears Starch (Coix lacryma-jobi)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/jobs-tears-starch-coix-lacryma-jobi
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-18
**Evidence Score:** 4 / 10
**Category:** Other
**Also Known As:** Coix lacryma-jobi, Yi Yi Ren, Chinese Pearl Barley, Adlay, Ma-yuen, Tear Grass, Christ's Tears, Coix Seed

## Overview

Job's tears starch, derived from Coix lacryma-jobi seeds, contains high levels of [beta-glucan](/ingredients/condition/immune-support) and coixenolide compounds that support [digestive health](/ingredients/condition/gut-health) and provide anti-inflammatory effects. These bioactive components work by modulating gut microbiota and inhibiting [pro-inflammatory cytokine](/ingredients/condition/inflammation)s like TNF-α and IL-6.

## Health Benefits

- Supports [digestive health](/ingredients/condition/gut-health) through high carbohydrate and fiber content.
- Acts as a natural diuretic, helping reduce water retention and swelling.
- Provides [anti-inflammatory](/ingredients/condition/inflammation) effects beneficial for joint health and gut comfort.
- Hydrates and soothes skin when applied topically in cosmetic formulations.
- Aids in satiety and metabolic balance, supporting healthy weight management. Additionally, the nutritional profile of Job's Tears Starch (Coix lacryma-jobi) includes - complex carbohydrates: serve as a clean energy source and promote digestive comfort. For enhanced efficacy, Job's Tears Starch (Coix lacryma-jobi) can be combined with complementary ingredients. Hermetica Synergy Stack (Formulation Heuristic)
Role: Functional whole-food/ingredient
Intention: Gut & Microbiome | Energy & [Metabolism](/ingredients/condition/weight-management)
Primary Pairings: Turmeric (Curcuma longa); Ginger (Zingiber officinale); Vitamin C (Ascorbic Acid); Ashwagandha (Withania somnifera)
Notes (from original entry): Mung Bean, Lotus Seed, Rice Bran
Evidence: see study_urls / reference_urls

## Mechanism of Action

Job's tears starch contains [beta-glucan](/ingredients/condition/immune-support) polysaccharides that enhance [gut barrier](/ingredients/condition/gut-health) function by stimulating beneficial Lactobacillus and Bifidobacterium growth. The coixenolide compounds inhibit cyclooxygenase-2 (COX-2) and nuclear factor-kappa B (NF-κB) pathways, reducing [inflammatory](/ingredients/condition/inflammation) cytokine production. Its diuretic effects result from potassium content and mild aldosterone receptor antagonism.

## Clinical Summary

Limited human studies exist for isolated Job's tears starch, with most research conducted on whole Coix lacryma-jobi extracts. Animal studies (n=30-60) show 200-400mg/kg doses reduce [inflammatory](/ingredients/condition/inflammation) markers by 25-40% and improve gut [microbiome diversity](/ingredients/condition/gut-health). Small human trials (n=20-40) suggest 3-6g daily may improve digestive symptoms, but larger controlled studies are needed. Evidence quality remains preliminary with most studies lasting 4-8 weeks.

## Nutritional Profile

- Complex carbohydrates: Serve as a clean energy source and promote digestive comfort.
- Dietary fiber: Supports bowel regularity and [microbiome](/ingredients/condition/gut-health) balance.
- Magnesium, potassium, calcium: Enhance [cardiovascular](/ingredients/condition/heart-health), muscular, and [bone health](/ingredients/condition/bone-health).
- Phytochemicals (e.g., coixenolide, ferulic acid): Offer [anti-inflammatory](/ingredients/condition/inflammation) and [antioxidant activity](/ingredients/condition/antioxidant).
- Small amounts of protein: Contribute to tissue repair and [immune support](/ingredients/condition/immune-support).

## Dosage & Preparation

Recommended Dosage: Fresh: Consume 1-2 servings (about 150g) daily as part of a balanced diet. Powder: Mix 1-2 teaspoons (3-6g) into smoothies, yogurt, or beverages. Dried: 30-50g daily as a nutrient-dense snack.

Traditional Use & Preparation: - Culinary: Used as a gluten-free thickener in soups, stews, sauces, and desserts.
- Skincare: Added to face masks, powders, and creams to moisturize and calm the skin.
- Decoction: Consumed in traditional medicine to relieve [inflammation](/ingredients/condition/inflammation) and promote urination.
- Powder: Mixed with herbal teas or food as a mild cooling and nutritive agent.

General Guidance: Start with a lower dose and increase gradually. Consult a healthcare provider before starting any new supplement, especially if pregnant, nursing, or taking medications.

## Safety & Drug Interactions

Job's tears starch is generally well-tolerated with mild gastrointestinal upset reported in some users at high doses above 10g daily. May enhance effects of diuretic medications due to potassium content and mild diuretic properties. No significant drug interactions documented, but blood sugar monitoring recommended for diabetics due to carbohydrate content. Safety during pregnancy and breastfeeding not established through clinical studies.

## Scientific Research

Scientific studies confirm Job’s Tears’ [anti-inflammatory](/ingredients/condition/inflammation), diuretic, and [antioxidant](/ingredients/condition/antioxidant) properties. Its starch exhibits excellent physicochemical qualities for food and cosmetic formulations, and research supports its use in gastrointestinal and metabolic health. See PMC7117570; ScienceDirect: S2210803315300450; PubMed: 15548119.

## Historical & Cultural Context

Job’s Tears starch has long been a staple in East Asian herbal medicine and culinary tradition. In Traditional Chinese Medicine, it is regarded as a cooling food that harmonizes [digestion](/ingredients/condition/gut-health), clears dampness, and supports detoxification. It remains revered as both nourishment and medicine, bridging ancestral practices and modern wellness trends.

## Synergistic Combinations

Hermetica Synergy Stack (Formulation Heuristic)
Role: Functional whole-food/ingredient
Intention: Gut & [Microbiome](/ingredients/condition/gut-health) | Energy & [Metabolism](/ingredients/condition/weight-management)
Primary Pairings: Turmeric (Curcuma longa); Ginger (Zingiber officinale); Vitamin C (Ascorbic Acid); Ashwagandha (Withania somnifera)
Notes (from original entry): Mung Bean, Lotus Seed, Rice Bran
Evidence: see study_urls / reference_urls

## Frequently Asked Questions

### How much Job's tears starch should I take daily?

Typical dosing ranges from 3-6 grams daily, divided into 2-3 doses with meals. Start with 1-2 grams daily and gradually increase to assess tolerance, as higher doses may cause digestive upset.

### Can Job's tears starch help with water retention?

Yes, Job's tears starch contains natural compounds that promote mild diuresis through potassium content and aldosterone receptor effects. Studies suggest it may reduce fluid retention, though effects are generally mild compared to prescription diuretics.

### Is Job's tears starch safe for people with diabetes?

Job's tears starch is primarily carbohydrate-based and may affect blood sugar levels. Diabetics should monitor glucose closely and consult healthcare providers, as the 3-6g typical dose contains approximately 12-24 calories from carbohydrates.

### What's the difference between Job's tears starch and the whole grain?

Job's tears starch is the isolated carbohydrate fraction containing concentrated beta-glucans, while whole Job's tears grain includes protein, fats, and additional fiber. The starch form provides more concentrated polysaccharide benefits but lacks the complete nutritional profile.

### Can I use Job's tears starch if I have gluten sensitivity?

Job's tears starch is naturally gluten-free as it comes from Coix lacryma-jobi, which is not related to wheat, barley, or rye. However, cross-contamination during processing is possible, so choose certified gluten-free products if you have celiac disease.

### Is Job's tears starch safe during pregnancy and breastfeeding?

Job's tears starch is generally considered safe during pregnancy and breastfeeding as it is a whole food ingredient commonly consumed in Asian cuisines; however, pregnant and nursing women should consult their healthcare provider before adding supplements, especially regarding quantity and individual health circumstances. Traditional use suggests it is well-tolerated, but personalized medical advice is recommended to ensure it aligns with individual pregnancy or lactation needs.

### Does Job's tears starch interact with common medications or blood thinners?

Job's tears starch has not been documented to have significant interactions with common medications or blood thinners in clinical literature; however, its mild diuretic properties mean individuals taking diuretic medications should inform their healthcare provider to avoid compounding effects. Anyone on prescription medications, particularly for blood pressure or kidney function, should consult with a healthcare professional before regular supplementation.

### What clinical research shows about Job's tears starch for skin health and inflammation?

Traditional and emerging research suggests Job's tears starch contains compounds with anti-inflammatory and skin-soothing properties, particularly when used topically in cosmetic applications for hydration and irritation relief. While preliminary studies support its benefits for joint inflammation and digestive comfort, more robust clinical trials are needed to establish definitive efficacy standards and optimal therapeutic dosing for specific health conditions.

## References

ScienceDirect article

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