# Salacia (Salacia reticulata)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/salacia
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-30
**Evidence Score:** 2 / 10
**Category:** Ayurveda
**Also Known As:** Salacia reticulata, Kotala himbutu, Ponkoranti, Saptarangi, Indian salacia, Kothalahimbutu, Celestraceae family plant, Salacia oblonga, Hippocratea reticulata

## Overview

Salacia reticulata is an Ayurvedic plant whose primary bioactive compounds—salacinol, kotalanol, and mangiferin—inhibit intestinal alpha-glucosidase enzymes to blunt postprandial blood sugar spikes. Its additional mechanisms targeting lipid [metabolism](/ingredients/condition/weight-management) and gut microbiota make it a multi-target botanical for metabolic health.

## Health Benefits

• Reduces postprandial glucose and insulin levels in type 2 diabetes patients (PMID: 15707755).
• Lowers [LDL cholesterol](/ingredients/condition/heart-health) and fasting blood sugar in prediabetes/hyperlipidemia patients (PMID: 23767865).
• Improves [T-cell](/ingredients/condition/immune-support) proliferation and alters gut microbiota in healthy adults (PMID: 26630568).
• Reduces HbA1c levels in type 2 diabetes patients via biscuit formulation (PMID: 37885536/PMC10599346).
• Consistently reduces HbA1c and insulin levels over 6 weeks to 3 months (PMID: 25889885).

## Mechanism of Action

Salacinol and kotalanol, thiosugar sulfonium compounds in Salacia reticulata, competitively inhibit intestinal alpha-glucosidases (maltase, sucrase, isomaltase) in the brush border of the small intestine, delaying carbohydrate hydrolysis and glucose absorption. Mangiferin contributes to improved [insulin sensitivity](/ingredients/condition/weight-management) by activating PPAR-gamma pathways and reducing hepatic glucose output. Together these compounds also modulate gut microbiota composition—particularly increasing Bifidobacterium populations—which may further support glycemic and immune regulation.

## Clinical Summary

A randomized controlled trial (PMID: 15707755) in type 2 diabetes patients demonstrated significant reductions in postprandial glucose and insulin levels following Salacia reticulata extract (240 mg/day). A subsequent RCT (PMID: 23767865) in prediabetic and hyperlipidemic individuals showed meaningful decreases in [LDL cholesterol](/ingredients/condition/heart-health) and fasting [blood glucose](/ingredients/condition/weight-management) over 12 weeks. A crossover study (PMID: 26630568) in healthy adults found improved [T-cell](/ingredients/condition/immune-support) proliferation and favorable shifts in gut microbiota composition at doses of 240–480 mg/day. Overall, evidence is promising but limited to small trials (typically 20–60 participants), necessitating larger, longer-duration studies to confirm efficacy and optimal dosing.

## Nutritional Profile

Salacia reticulata is a woody medicinal plant whose nutritional value lies primarily in its bioactive phytochemical composition rather than conventional macronutrient density. Root and stem bark preparations are the primary therapeutic forms used.

**Bioactive Compounds (Primary):**
• Kotalanol – thiosugar sulfonium sulfate; potent α-glucosidase inhibitor; concentration approximately 0.1–0.5% dry weight in root bark; inhibits maltase and sucrase with IC50 values in the nanomolar range.
• Salacinol – sulfonium-type pseudosaccharide; α-glucosidase inhibitor (IC50 ~0.3–1.2 μg/mL against intestinal maltase); found alongside kotalanol in root extracts.
• Neokotalanol and de-O-sulfonated derivatives – minor sulfonium sulfates with complementary enzyme inhibitory activity.
• Mangiferin (C-glucosylxanthone) – present at approximately 1–3% dry weight; inhibits pancreatic lipase and aldose reductase; exhibits antioxidant and [anti-inflammatory](/ingredients/condition/inflammation) properties; bioavailability is moderate (~25–30% absorption in animal models).
• Kotalagenin 16-acetate – triterpenoid saponin contributing to lipid-lowering effects via inhibition of pancreatic lipase.
• Salasol A and B – phenolic glycosides with [antioxidant activity](/ingredients/condition/antioxidant).
• Epigallocatechin gallate (EGCG) and related catechins – present in smaller concentrations (~0.05–0.2% dry weight); contribute to antioxidant capacity.
• Betulinic acid and related pentacyclic triterpenes – detected in stem bark at trace concentrations (<0.1% dry weight).

**Macronutrients (per 100g dried root powder, estimated):**
• Carbohydrates: ~60–65g (predominantly structural polysaccharides and fiber; simple sugars minimal).
• Dietary fiber: ~20–25g (insoluble lignin-rich matrix dominant; soluble fiber fraction ~3–5g — [prebiotic](/ingredients/condition/gut-health) activity confirmed in human study PMID: 26630568).
• Protein: ~5–8g (limited essential amino acid profile; not a significant protein source).
• Fat: ~1–3g (trace fatty acids; not nutritionally significant).
• Moisture (dried): ~8–10%.

**Micronutrients (approximate, dry weight basis):**
• Calcium: ~150–300 mg/100g.
• Iron: ~5–10 mg/100g.
• Potassium: ~300–500 mg/100g.
• Magnesium: ~80–120 mg/100g.
• Zinc: ~1–3 mg/100g.
• Vitamin C: negligible in dried preparations; present in fresh plant material at low levels (~5–15 mg/100g fresh weight).
• Tannins (hydrolyzable): ~2–5% dry weight; contribute astringency and antioxidant activity but may reduce mineral bioavailability via chelation.

**Bioavailability Notes:**
• Salacinol and kotalanol act luminally within the gastrointestinal tract; systemic absorption is limited and their primary mechanism is local enzyme inhibition at the brush border — this is therapeutically advantageous as it reduces postprandial glucose spikes without requiring systemic absorption.
• Mangiferin undergoes phase II [metabolism](/ingredients/condition/weight-management) (glucuronidation and sulfation); food matrix (e.g., biscuit formulation per PMID: 37885536) may modestly improve bioavailability compared to aqueous extracts.
• Tannin content (~2–5%) may complex with iron and zinc, reducing their bioavailability by 20–40% if consumed simultaneously with mineral-rich foods.
• Typical therapeutic dose used in clinical studies: 240–1000 mg standardized extract daily; biscuit formulation provided ~1g extract equivalent per serving.

## Dosage & Preparation

Clinically studied doses include 500 mg/day of root bark or leaf extracts for prediabetes and hyperlipidemia. Herbal tea and biscuit formulations were also used, though exact doses were unspecified. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Salacia reticulata is generally well tolerated at studied doses (240–480 mg/day), with the most commonly reported side effects being mild gastrointestinal discomfort, including flatulence and loose stools, due to undigested carbohydrates reaching the colon. Because it inhibits alpha-glucosidases, concurrent use with antidiabetic medications such as metformin, sulfonylureas, or insulin may produce additive hypoglycemic effects, requiring [blood glucose](/ingredients/condition/weight-management) monitoring and potential dose adjustment. There is insufficient clinical data to confirm safety during pregnancy or lactation, so use should be avoided in these populations without medical supervision. No significant herb-drug interactions beyond glucose-lowering agents have been formally documented, though caution is warranted with any lipid-lowering therapy given its cholesterol-modulating activity.

## Scientific Research

Key clinical trials include a double-blind RCT with 25 type 2 diabetes patients showing reduced glucose levels (PMID: 15707755) and a study on prediabetes patients showing [LDL cholesterol](/ingredients/condition/heart-health) reduction with root bark extract (PMID: 23767865). Improvements in immune response and microbiota were noted in healthy adults (PMID: 26630568).

## Historical & Cultural Context

Salacia reticulata has been traditionally used in Ayurvedic medicine in Sri Lanka and India for managing diabetes and obesity. It is commonly prepared as decoctions, teas, or powders from the plant's roots and stems.

## Synergistic Combinations

Vitamin D, Cinnamon, Chromium, Berberine, Fenugreek

## Frequently Asked Questions

### How does Salacia reticulata lower blood sugar?

Salacia reticulata contains salacinol and kotalanol, which competitively inhibit alpha-glucosidase enzymes in the intestinal brush border, slowing the breakdown of complex carbohydrates into glucose. This delays glucose absorption into the bloodstream, reducing the postprandial blood sugar spike typically seen after a carbohydrate-rich meal. Clinical trials have confirmed reductions in both postprandial glucose and insulin levels at doses of 240 mg/day.

### What is the recommended dosage of Salacia supplement?

Clinical studies have most commonly used standardized Salacia reticulata extract at doses of 240–480 mg per day, typically divided and taken before meals to maximize alpha-glucosidase inhibition at the time of carbohydrate digestion. No universally established therapeutic dose exists, as research is still limited to small trials. It is advisable to follow product-specific standardization for salacinol content and consult a healthcare provider, especially when combining with diabetes medications.

### Can Salacia reticulata lower cholesterol?

Yes, a 12-week randomized controlled trial (PMID: 23767865) in patients with prediabetes and hyperlipidemia found that Salacia reticulata extract produced significant reductions in LDL cholesterol alongside fasting blood glucose. The lipid-lowering effect is thought to be partly mediated by mangiferin, which may inhibit hepatic fatty acid synthesis and promote cholesterol clearance. However, evidence remains limited to small studies, and it should not replace proven lipid-lowering therapies without physician guidance.

### Does Salacia affect gut bacteria?

A crossover human study (PMID: 26630568) found that Salacia reticulata supplementation at 240–480 mg/day increased populations of beneficial Bifidobacterium species in the gut microbiota of healthy adults. This prebiotic-like effect occurs because undigested carbohydrates—resulting from alpha-glucosidase inhibition—serve as fermentation substrate for beneficial bacteria in the colon. The same study also observed improved T-cell proliferation, suggesting a potential link between Salacia's gut microbiota modulation and immune function.

### Is Salacia reticulata safe to take with metformin or other diabetes medications?

Salacia reticulata has additive blood-glucose-lowering effects when combined with medications like metformin, sulfonylureas, or insulin, which raises the risk of hypoglycemia. Patients on antidiabetic drugs should monitor blood glucose closely and inform their prescribing physician before adding Salacia to their regimen, as medication doses may need adjustment. No formal pharmacokinetic interaction studies between Salacia and metformin have been published, so clinical caution and professional supervision are strongly recommended.

### What is the best form of Salacia reticulata supplement for blood sugar control?

Clinical studies have demonstrated that Salacia reticulata in biscuit formulation and standardized extract forms both effectively reduce HbA1c and postprandial glucose levels in type 2 diabetes patients. Standardized extracts containing salacinol and related compounds appear to offer consistent potency across doses. The most researched forms are concentrated extracts providing 240-500 mg daily, though whole plant decoctions are also used in traditional practice.

### Who is most likely to benefit from Salacia reticulata supplementation?

Individuals with type 2 diabetes or prediabetes, particularly those with elevated postprandial glucose and insulin levels, show the most pronounced benefits from Salacia supplementation. Those with concurrent hyperlipidemia (high cholesterol) may also benefit, as studies show Salacia reduces LDL cholesterol alongside blood sugar improvements. Healthy adults seeking metabolic support and prebiotic benefits represent a secondary population, though the strongest evidence base exists for diabetes-related conditions.

### How does Salacia reticulata work differently from other blood sugar herbs?

Salacia reticulata uniquely combines alpha-glucosidase inhibition (slowing carbohydrate digestion) with prebiotic effects that alter gut microbiota composition and enhance T-cell immune function. Unlike some blood sugar herbs that work primarily through insulin secretion, Salacia reduces both glucose and insulin levels postprandially without stimulating pancreatic beta cells. This dual mechanism—glycemic control plus microbiota modulation—distinguishes it from conventional herbal glucose support ingredients.

---

*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
*License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*