Maritime Pine Bark Extract: Effects on Health

Maritime pine bark extract (Pinus pinaster Ait. ssp. Atlantica) is a botanical extract derived from the bark, containing compounds from the proanthocyanidin class. Compiled studies have examined these compounds alongside antioxidant measurements (PMID 38757130). Oligomeric proanthocyanidins (OPC) are compounds found in the plant bark, consisting of linked flavonoid rings. A review compiling the pharmacokinetics of the extract gathers data on the absorption and distribution of these compounds (PMID 38757126).

Systematic reviews on the extract indicate that the measured endpoints predominantly focus on cardiovascular health, joint health, and mental functions (PMID 39987124). In studies conducted with participants with osteoarthritis, short-term effects on pain scales have been reported in the extract arms. In a meta-analysis by the British Journal of Sports Medicine evaluating 20 supplements across 69 randomized controlled trials, maritime pine bark extract was listed among the seven supplements reporting a large effect size (>0.80) in short-term pain reduction (PMID 29018060).

Attention deficit/hyperactivity disorder (ADHD) in children and adolescents is also among the areas where this extract has been studied. A systematic review compiling herbal products reported positive outcomes on attention, hyperactivity, and behavior scales in studies conducted with maritime pine bark extract (PMID 37663386). The same review notes that more high-quality studies are needed to translate these findings into clinical practice.

The pharmacokinetic review reports that the extract components are absorbed from the intestine and show widespread distribution in the body (PMID 38757126). Bioavailability defines the extent to which a compound enters circulation after ingestion. These data are used to discuss the biochemical basis on which the endpoints measured in clinical studies are based.

This broad area of review makes the extract a continuing subject of research. The page conveys what current studies measure; it does not carry a usage recommendation or treatment guidance.

Examinations at the molecular level reveal the parameters with which the extract has been studied. In compiled clinical studies, the oligomeric proanthocyanidins (OPCs) in the extract have been examined alongside antioxidant defense markers and oxidative stress measurements; reductions in oxidative stress indicators have been reported in these measurements (PMID 38757130). Oxidative stress describes the imbalance between the load of free radicals and antioxidant capacity in the cell.

The same compilation also reported positive changes in endothelial function measurements (PMID 38757130). The endothelium is a layer of cells lining the interior surface of blood vessels and plays a role in vasodilation and regulation of blood flow. Disease prevention is not an endpoint measured in these studies.

Inflammation markers have also been measured in the compiled studies (PMID 38757130); disease progression is not an endpoint in these studies. On the connective tissue side, a meta-analysis compiling studies conducted with participants with osteoarthritis reported short-term significant effects on joint pain and physical function scales (PMID 29018060); direct measurement of collagen structure is not included in this compilation. Matrix metalloproteinases (MMPs) are enzymes involved in the remodeling of connective tissue; their activity has been discussed alongside oxidative stress and inflammation in venous vessel studies (PMID 38338837).

Skin health is also among the topics examined in the same compilation (PMID 38757130); no endpoint regarding signs of aging has been reported. The statements in this section pertain to the variables measured; they do not promise a health outcome attributed to the extract.

Clinical studies demonstrate the outcomes measured for the extract. In studies conducted with participants with osteoarthritis, short-term clinically significant effects on pain and physical function have been reported. A meta-analysis by the British Journal of Sports Medicine, evaluating 20 supplements across 69 randomized controlled trials, lists maritime pine bark extract among the seven supplements reporting a large effect size (>0.80) for pain reduction in the short term; the same analysis did not report clinically significant effects in the medium and long term (PMID 29018060).

Attention deficit hyperactivity disorder (ADHD) is the second area of research. A systematic review published in the Avicenna Journal of Phytomedicine reported positive outcomes on ADHD symptom scales in studies conducted with this herbal product (PMID 37663386). The same review notes that due to the limited number of participants and methodological differences, the findings cannot be generalized.

A meta-analysis on erectile dysfunction (ED) reports that the combination of the extract with L-arginine is associated with positive changes in sexual function scores in participants with moderate ED, while no significant difference in testosterone levels was reported (PMID 37908749).

A review compiling 39 randomized, double-blind, placebo-controlled studies involving 2,009 participants evaluates outcomes in cardiovascular health, chronic venous insufficiency, cognition, joint health, skin health, eye health, respiratory health, and sports performance (PMID 38757130).

These studies demonstrate the areas in which the extract has been measured. The common emphasis of the reviews is the need for more high-quality studies for long-term outcomes and the generalizability of findings.

The extract has been studied across a wide range of outcomes in recent years, making it the subject of numerous reviews. In the context of osteoarthritis, a systematic review and meta-analysis published in the British Journal of Sports Medicine reported large and clinically significant effects on pain scales in the short term (PMID 29018060).

Sports performance is among the topics addressed in a review compiling 39 randomized double-blind placebo-controlled trials (PMID 38757130). This page conveys which topics were measured; it does not include usage recommendations, product guidance, or dosage schemes.

In the area of ADHD, a review in the Avicenna Journal of Phytomedicine reported positive results on symptom scales, but noted that the number of studies is limited (PMID 37663386).

On the vascular side, research published in the International Journal of Molecular Sciences discusses the role of oxidative stress and inflammation in the development of chronic venous diseases (PMID 38338837); the extract is among the components examined in this literature.

This section contains brief notes on the scope of studies mentioned in the body; the page's source list is printed separately in the bibliography section.

A meta-analysis conducted on individuals with osteoarthritis covers 20 different supplements and reports significant effects on pain and physical function in the short term; no clinically significant effect was reported in the medium and long term (PMID 29018060).

Cardiovascular health, chronic venous insufficiency, joint, skin, and respiratory health are evaluated together in a review involving 2,009 participants and 39 studies (PMID 38757130). The first author of this review is associated with the manufacturer of the extract examined; a conflict of interest statement is included in the article. The pharmacokinetic review reports that low molecular weight components are absorbed from the intestine and enter systemic circulation (PMID 38757126).

Studies conducted on children and adolescents with ADHD have reported positive results on attention and hyperactivity scales; the same review indicates that more high-quality clinical studies are needed (PMID 37663386).

In a meta-analysis on erectile dysfunction, significant improvement in sexual function scores was reported in the arm where the extract was applied together with arginine (PMID 37908749).