Centella Asiatica for Circulation and Lymphatic Health

Published by Lymphatic Health Co., the company behind Lympha.

Centella asiatica, also known as gotu kola, earns its place in Lympha through human research on capillary filtration, ankle swelling, and leg comfort. Those findings matter because the smallest blood vessels help determine how much fluid the lymphatic system needs to collect.

Understanding that connection explains why we chose Centella and why its extract specifications matter. It also brings an often-overlooked part of lymphatic health into focus: the movement of fluid from the bloodstream into surrounding tissue.

Why capillary function matters for lymphatic health

Capillaries are tiny blood vessels that help supply your tissues. Fluid filters across their walls into the spaces around cells as part of normal circulation. Lymphatic vessels collect tissue fluid and proteins and return them to the bloodstream.

The pressure inside small blood vessels and the properties of their walls influence how much fluid moves into the tissues. When venous pressure stays elevated, filtration can increase, adding to the amount the lymphatic system must handle. Read the review of microvascular fluid exchange.

This gives capillary research a clear relevance to lymphatic support. The physiological rationale is that reducing excess filtration may help ease the additional fluid load placed on lymphatic vessels. Our article Why Circulation Matters for Lymphatic Health explains how these systems work together.

What researchers study in Centella

The circulation studies discussed here used concentrated preparations of Centella compounds called triterpenes. You will see these preparations described as TECA, a titrated extract of Centella asiatica, or TTFCA, its total triterpenic fraction.

That detail matters when reading the research. A defined triterpene preparation gives researchers a specific intervention to test. It also gives formulators something meaningful to evaluate beyond the botanical name.

What the human studies show

Reduced capillary filtration and ankle swelling

A four-week randomized, placebo-controlled trial studied 52 people with venous hypertension, meaning elevated pressure in their veins. Participants received a Centella triterpenic fraction at either 90 mg or 180 mg daily, or placebo. A separate group of 10 healthy participants also received the higher dose.

Researchers measured capillary filtration, ankle circumference, and ankle edema. Both treated patient groups improved from their starting measurements, with greater improvements at 180 mg daily. Neither the placebo group nor the healthy comparison group showed significant changes. Symptoms, including swelling sensation and tiredness, also improved in the treated patient groups. Read the capillary-filtration trial.

The relevance is unusually direct: the study examined fluid moving into tissue and the ankle swelling associated with it. That is precisely the part of fluid balance that makes Centella interesting to us.

Changes in leg volume and microcirculation

Another randomized, placebo-controlled study followed 40 people with venous hypertension for six weeks. The active group received 60 mg of TTFCA twice daily, totaling 120 mg per day.

In that group, leg volume decreased by an average of 66 mL from baseline, approximately 1.3%. Researchers also reported improvements in skin oxygen measurements and the response of small blood vessels to changes in limb position. These measurements examined microcirculation, the flow of blood through the body's smallest vessels, alongside swelling. Read the microcirculation and leg-volume study.

Less heaviness and edema

A multicenter, double-blind trial enrolled 94 people with venous insufficiency in their lower limbs. Over two months, participants received TECA at 60 mg daily, 120 mg daily, or placebo.

The researchers found significant improvements in leg heaviness and edema in favor of TECA compared with placebo. Participants' overall assessments also favored the extract. This adds an everyday comfort dimension to the studies measuring fluid and vessel function. Read the trial of TECA for venous insufficiency.

A review of eight trials also found improvements in several measures of microcirculation. Most of the evidence comes from smaller studies in people with venous disease, and some trial methods were incompletely reported. Read the review of Centella clinical trials.

How this connects to lymphedema

The relationship between capillary filtration and lymphatic workload becomes especially relevant when venous insufficiency and lymphedema overlap. This is known as phlebolymphedema. Sustained venous pressure can increase filtration until the lymphatic system struggles to keep up. Read the vascular societies' consensus on lymphedema.

Centella's capillary findings offer a reason to investigate support for this part of the fluid-balance system. The studies above examined venous conditions rather than treatment of diagnosed lymphedema, so their relevance here is a physiological rationale. For someone with lymphedema, any supplement belongs within a care plan developed with their treating clinician.

Why Lympha uses standardized Centella

Every 4 mL daily serving of Lympha contains 225 mg of Centella asiatica extract, standardized to 40% total triterpenes. That provides approximately 90 mg of triterpenes per serving.

Disclosing both the extract amount and its triterpene content makes the formulation easier to assess. It tells you how much of the compound group central to this research the formula provides.

The studies used purified fractions with particular triterpene profiles. Lympha's total-triterpene specification is a useful point of comparison; clinical results remain specific to each tested preparation.

Within Lympha, Centella contributes a clear focus on capillary filtration and microcirculation. It sits alongside diosmin and hesperidin, selected for their venous-health research, and grape seed extract, which brings studies of fluid accumulation and venous function. Butcher's broom completes the formula's five actives.

The finished Lympha formula has not yet been evaluated in a clinical trial. Our confidence in its design comes from selecting ingredients for defined roles, specifying their amounts, and connecting those decisions to relevant human research.

Supporting fluid balance where it begins

Centella helps explain why a lymphatic-support formula should consider the processes that influence fluid entering the tissues. Its human research includes measured changes in capillary filtration, ankle swelling, leg volume, and heaviness. Those findings give it a specific purpose in Lympha: supporting the small-vessel side of a connected fluid-balance system.

Explore the research behind Lympha.

This article is educational. If you have lymphedema, persistent swelling, or take medication, discuss supplementation with your clinician. Lympha is not intended to diagnose, treat, cure, or prevent disease.