Berberine Blood Sugar Care, 60 Veggie Capsules

Berberine is a yellow alkaloid found in the roots and stems of plants such as goldthread (Coptis), Amur cork tree and barberry (Berberis). A major constituent of traditional East Asian botanicals, it has recently been studied extensively in relation to blood glucose and lipid metabolism markers.

Berberine has been studied for activating AMPK (AMP-activated protein kinase), known as the cell's energy sensor, shifting muscle and liver toward greater glucose use and fatty acid oxidation. In liver cells, it has been reported to increase LDL receptor (LDLR) expression and lower PCSK9 expression, contributing to the clearance of blood LDL cholesterol. Because it is poorly absorbed from the gut, studies suggest it may act directly on the gut microbiota and intestinal lining, which is discussed as one pathway behind changes in metabolic markers.

1. A meta-analysis of 46 RCTs in adults needing blood glucose management reported that berberine (alone or alongside existing care) was associated with reductions in HbA1c, fasting glucose, 2-hour post-meal glucose, fasting insulin, HOMA-IR, triglycerides and LDL cholesterol, and an increase in HDL cholesterol (2021).
2. A meta-analysis of placebo-controlled RCTs in adults with metabolic risk factors reported changes after berberine in triglycerides (−0.37 mmol/L), fasting glucose (−0.52 mmol/L), waist circumference (−3.27 cm) and LDL cholesterol (−0.50 mmol/L), with no significant change in HDL cholesterol or blood pressure (2025).
3. A meta-analysis pooling 27 RCTs (2,569 participants) found that combining lifestyle management with berberine produced greater changes in blood glucose, total cholesterol and LDL cholesterol markers than lifestyle management alone, with no serious adverse events reported (2015).

1. meta-analysisGuo J et al. The Effect of Berberine on Metabolic Profiles in Type 2 Diabetic Patients: A Systematic Review and Meta-Analysis of Randomized Controlled Trials Oxid Med Cell Longev. 2021. PMID 34956436
2. meta-analysisLiu D et al. Efficacy and safety of berberine on the components of metabolic syndrome: a systematic review and meta-analysis of randomized placebo-controlled trials Front Pharmacol. 2025. PMID 40740996
3. meta-analysisLan J et al. Meta-analysis of the effect and safety of berberine in the treatment of type 2 diabetes mellitus, hyperlipemia and hypertension J Ethnopharmacol. 2015. PMID 25498346

Bitter melon is the fruit of a tropical vine in the gourd family, known for its strong bitter taste and widely used as a food and traditional ingredient across Asia, India and the Caribbean. Its main known constituents include charantin, polypeptide-p and cucurbitane triterpenoids.

Laboratory studies report that bitter melon's cucurbitane-type triterpenoids and charantin activate AMPK in muscle and liver cells and promote translocation of the glucose transporter GLUT4. Polypeptide-p is described as a plant protein with an insulin-like structure, and slowing of carbohydrate-digesting enzyme activity in the gut has also been studied. These effects have mainly been observed at the cell and animal level, and results from human studies are inconsistent.

1. In a 12-week parallel RCT (38 participants) of adults with borderline glucose metabolism markers, the group taking freeze-dried whole bitter melon (3.6 g/day) showed significant reductions in fasting glucose, fasting insulin and HOMA-IR versus control, while a 4-week crossover trial (30 participants) found no significant difference between groups (2025).
2. A meta-analysis of 8 RCTs (423 participants) reported reductions in total cholesterol (−9.71 mg/dL) and triglycerides (−10.24 mg/dL) after bitter melon, with no significant change in LDL or HDL cholesterol (2024).
3. A meta-analysis of 9 RCTs (414 participants) found no significant differences versus placebo in fasting glucose, HbA1c, lipids or body weight, concluding that current evidence is insufficient to judge its effect on metabolic markers (2024).
4. A meta-analysis of 10 clinical trials (448 participants) found no significant changes in body weight, BMI, waist circumference or body fat percentage with bitter melon (2024).

1. RCTMes JJ et al. Bitter gourd (Momordica charantia L.) supplementation for twelve weeks improves biomarkers of glucose homeostasis in a prediabetic population J Ethnopharmacol. 2025. PMID 40199408
2. meta-analysisAmini MR et al. The Effects of Bitter Melon ( Mormordica charantia ) on Lipid Profile: A Systematic Review and Meta-Analysis of Randomized Controlled Trials Phytother Res. 2024. PMID 39444254
3. meta-analysisLaczkó-Zöld E et al. The metabolic effect of Momordica charantia cannot be determined based on the available clinical evidence: a systematic review and meta-analysis of randomized clinical trials Front Nutr. 2023. PMID 38274207
4. meta-analysisZou Y et al. The effects of bitter melon (Momordica charantia) on anthropometric indices in adults: A systematic review and meta-analysis of randomized controlled trials Prostaglandins Other Lipid Mediat. 2024. PMID 39079610

Banaba (Lagerstroemia speciosa) is a crape myrtle species native to the Philippines and Southeast Asia, where its leaves are traditionally brewed as a tea. Corosolic acid, a triterpene found in the leaves, is its key marker compound and is mainly studied in relation to post-meal blood glucose.

Laboratory studies report that corosolic acid supports phosphorylation of the insulin receptor inside cells and promotes translocation of the glucose transporter GLUT4 to the cell membrane, contributing to glucose uptake by muscle and fat cells. The ellagitannins in banaba leaf are associated with slowing the enzymes that break down starch and sucrose in the gut (α-glucosidase, α-amylase). Other studies suggest roles in limiting hepatic gluconeogenesis and modulating lipid metabolism (via signalling pathways such as PPAR).

1. In a double-blind crossover study of 31 people, taking 10 mg of corosolic acid 5 minutes before a 75 g oral glucose tolerance test kept blood glucose lower than placebo at 60–120 minutes, with a significant difference reported at 90 minutes (2006).
2. A literature review of animal, cell and human studies on banaba and corosolic acid summarised several mechanisms, including enhanced glucose uptake, delayed breakdown of starch and sucrose, and reduced gluconeogenesis, and noted that no adverse effects were reported in controlled human trials (2012).
3. In a retrospective observational study of 31 overweight or obese postmenopausal women, 12 weeks of combined myo-inositol 2 g and banaba extract (1% corosolic acid) 48 mg was followed by reductions in fasting insulin and HOMA-IR and a 23.5% reduction in the glucose area under the curve on a glucose tolerance test (2025, uncontrolled study).

1. RCTFukushima M et al. Effect of corosolic acid on postchallenge plasma glucose levels Diabetes Res Clin Pract. 2006. PMID 16549220
2. reviewStohs SJ et al. A review of the efficacy and safety of banaba (Lagerstroemia speciosa L.) and corosolic acid Phytother Res. 2012. PMID 22095937
3. clinical studyBattipaglia C et al. Combined myo-inositol and Banaba (1% Corosolic Acid) improve HOMA-IR and hepatic insulin extraction index in overweight and obese postmenopausal women Gynecol Endocrinol. 2025. PMID 41340221

A plant polyphenol ingredient made by water extraction of the bark of New Zealand radiata pine (Pinus radiata). On a dry powder basis it contains over 80% proanthocyanidins, along with taxifolin (1–2%) and other flavonoids and phenolic acids.

Its main constituents, proanthocyanidins (oligomers of linked catechin and epicatechin units), are known to scavenge free radicals directly and regenerate vitamin C, supporting the body's antioxidant network. Studies have looked at its relationship to the nitric oxide (NO) production environment in vascular endothelial cells, and cell experiments observed reduced expression of endothelial adhesion molecules and reduced monocyte migration in response to TNF-α stimulation. Test-tube studies have also reported lowered activity of carbohydrate-digesting enzymes (α-amylase, α-glucosidase), so its relationship to post-meal metabolic responses is being studied. These antioxidant and vascular mechanisms form the background for research on blood flow to the brain and cognitive function markers.

1. In a 5-week double-blind controlled study of 42 men aged 50–65 with a body mass index of 25 or more, the Enzogenol + vitamin C group showed faster response times on spatial working memory and immediate recognition tasks, while the vitamin C-only group showed no change. There were no changes in blood safety markers.
2. In a study randomising 44 adult smokers to Enzogenol 480 mg + vitamin C or vitamin C alone for 12 weeks, vascular dilation response (FMD) improved similarly in both groups, but the protein oxidation marker (protein carbonyl) was significantly lower in the Enzogenol group, and lower fibrinogen levels were observed in heavier smokers.
3. In a crossover study in which 25 healthy adults took placebo and Enzogenol 50 mg and 400 mg before oral glucose tolerance tests, people with a single-peak glucose curve showed a lower post-meal incremental glucose area (iAUC) and lower peak glucose than with placebo.
4. Composition and toxicity studies of the ingredient reported no abnormal findings with repeated dosing in animals, and no adverse changes in liver or kidney function or haematological markers in humans taking 480 mg/day for 6 months or 960 mg/day for 5 weeks.

1. RCTPipingas A et al. Improved cognitive performance after dietary supplementation with a Pinus radiata bark extract formulation. Phytother Res. 2008. PMID 18683195
2. RCTYoung JM et al. Comparative effects of enzogenol and vitamin C supplementation versus vitamin C alone on endothelial function and biochemical markers of oxidative stress and inflammation in chronic smokers. Free Radic Res. 2006. PMID 16298763
3. clinical studyLim WXJ et al. An Acute, Placebo-Controlled, Single-Blind, Crossover, Dose-Response, Exploratory Study to Assess the Effects of New Zealand Pine Bark Extract (Enzogenol(®)) on Glycaemic Responses in Healthy Participants. Nutrients. 2020. PMID 32075228
4. clinical studyFrevel MA et al. Production, composition and toxicology studies of Enzogenol® Pinus radiata bark extract. Food Chem Toxicol. 2012. PMID 22982471