Monday, March 02, 2026

Review - Plant Based Polyphenol Booster Health Supplements

Plant based prebiotics are becoming a popular health supplement and we have tried one from the company Pendulum Therapeutics in San Francisco.

Two capsules are recommended to be taken daily containing pomegranate extract, grape seed extract, and green tea extract. Prices start at $25 monthly for an introductory offer and/or subscription to the supplement. Here is what one capsule may do, followed by results of taking two capsules daily.

A 375mg daily dose of pomegranate extract, particularly when rich in punicalagins, is primarily used to support cardiovascular health, reduce blood pressure, and manage prostate health by slowing PSA doubling times. It acts as a potent antioxidant and anti-inflammatory, aiding in improved circulation, cholesterol reduction, and potential cartilage protection.

Pomegranate extract helps lower blood pressure and improve endothelial function, which can reverse plaque buildup in arteries (atherosclerosis). Studies indicate that 280-375 mg of punicalagins can halt or slow the progression of prostate cancer by increasing the doubling time of prostate-specific antigen (PSA). It reduces oxidative stress, fights inflammation, and can improve exercise endurance. It may improve liver health (reducing fibrosis), aid in metabolic health, and improve erectile dysfunction by enhancing nitric oxide production.

PubMed Central indicates Pomegranate extract can interact with blood pressure medications and cholesterol-lowering drugs (statins). Always consult a healthcare professional before starting supplements, especially if you have existing conditions or are taking medications.

The company's packaging indicates however to take two capsule daily which would double the amount to 750mg. It is said that such a dose:

Helps reduce LDL cholesterol oxidation, lowers blood pressure (especially systolic), and improves blood flow. High antioxidant content helps combat chronic inflammation and protects cells from oxidative stress. Boosts blood flow and may enhance recovery, reducing fatigue. May help regulate blood sugar, improve endometrial function in PCOS patients, and support joint health.  Daily supplementation has been linked to improved skin barrier function and reduced appearance of wrinkles.

Note: While 750mg is a common dosage for studies, it is always recommended to consult a doctor before starting a new supplement, particularly for conditions like high blood pressure or to monitor for interactions with other medications

275mg of grape seed extract (GSE) provides a high dose of potent antioxidants (proanthocyanidins) used primarily to support cardiovascular health, reduce blood pressure, and improve blood flow. It may also reduce leg swelling, aid in collagen production for skin health, and provide anti-inflammatory effects.

Studies suggest GSE can help lower blood pressure, improve lipid profiles (LDL/triglycerides), and act as a blood thinner, potentially reducing heart disease risk. It is used to reduce chronic venous insufficiency, which causes edema (swelling) and poor blood flow back to the heart. High levels of proanthocyanidins (OPCs) neutralize free radicals, protecting cells from oxidative stress and reducing damage to blood vessels. Some research suggests it may aid in wound healing, cognitive health, and, in some studies, weight loss.

While studies vary, 275mg is a substantial dosage within common ranges (often 100-300mg) used to achieve therapeutic effects. Generally safe, but may cause headache, dizziness, or nausea. Because it acts as a blood thinner, it may interact with medication like warfarin, aspirin, or other blood pressure meds.
 
The package however says take two capsules daily which would bring the grape seed extract to 550mg. While 550mg is a potent dose, research on GSE often ranges from 100mg to 2,000mg per day. Always consult a healthcare provider before starting a high-dose supplement like 550mg of grape seed extract.

225mg of green tea extract typically provides a concentrated dose of antioxidants (specifically EGCG) and moderate caffeine, designed to boost metabolism, enhance fat oxidation, increase energy/focus, and support heart/immune health. It works by protecting cells from oxidative stress and promoting fat metabolism. Promotes fat metabolism, aiding in weight loss and fat reduction, particularly when combined with exercise. Contains polyphenols (like EGCG) that fight free radicals, protect cells, and support immune health. Provides a mild energy boost due to caffeine content. May help lower risk factors for cardiovascular disease.

While generally safe, high doses can cause caffeine sensitivity issues like insomnia, anxiety, or nausea. In rare cases, very high concentrations have been linked to liver damage. It is important to check that the extract is standardized for polyphenol/EGCG content.
 
The package suggests two capsules daily for 450mg of green tea extract which provides a potent dose of antioxidants (polyphenols/EGCG) that support weight management by boosting metabolism, enhance cardiovascular health, improve brain function, and offer energy without the intense jitters of coffee. It is considered a moderate daily dose, helping to protect cells from damage.

Acts as a thermogenic agent, enhancing metabolism and increasing fat oxidation. Contains high levels of polyphenols and epigallocatechin gallate (EGCG), which neutralize free radicals. Supports heart health by improving blood pressure and cholesterol levels. Contains L-theanine and caffeine, which can improve focus, mood, and brain function. May improve glucose metabolism.

450mg is generally considered a moderate, effective dose. While beneficial, high doses of green tea extract can lead to potential risks, including stomach upset or, in rare cases, liver issues. It is often recommended to take it with food to minimize the risk of nausea.

Disclaimer: This information is for educational purposes only and does not constitute medical advice or a recommendation.

Pendulumlife.com for more information. 
Photo courtesy Pendulum Therapeutics LLC

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