Research suggests that L-proline plays a meaningful role in wound healing, primarily through its function as a key structural precursor to collagen — the protein central to tissue repair and skin integrity. The available evidence comes largely from animal studies and laboratory experiments rather than human clinical trials, and includes rat wound models showing improved tissue regrowth, collagen deposition, and wound strength with both topical and systemic proline administration, as well as in vitro studies demonstrating that incorporating L-proline into biomaterial scaffolds such as chitosan and alginate-gelatin hydrogels significantly accelerates wound closure, supports fibroblast activity, and enhances antioxidant and anti-biofilm properties. A 1965 cell biology study offers foundational mechanistic context, tracing how fibroblasts take up and process proline through intracellular compartments before secreting it as collagen, while a 2016 review highlights hydroxyproline — a modified form of proline found abundantly in collagen — as a promising biomarker for monitoring wound healing and related conditions. The overall direction of the evidence supports a role for L-proline in tissue repair, but the absence of controlled human trials, the variability in delivery methods studied, and the largely preclinical nature of the research base mean that conclusions about its practical use in people remain preliminary.
Citations from PubMed and preprint sources. Match score (0-100) reflects automated search ranking, not clinical appraisal.
| Title | Type | Year | Direction | Match |
|---|---|---|---|---|
| The Effects of Local and Systemic Administration of Proline on Wound Healing ... | Other | 2019 | Supports | 100 |
| Fabrication of l-proline enriched alginate dialdehyde-gelatin hydrogel thin f... | Other | 2024 | Supports | 95 |
| Biomimetic hydrogel loaded with silk and l-proline for tissue engineering and... | Other | 2017 | Supports | 90 |
| Secretion-based production of prolyl-hydroxylated human type III collagen in ... | Other | 2025 | Supports | 85 |
| The Wound Healing Property of N-Methyl-(2S,4R)-trans-4-Hydroxy-L-Proline from... | Other | 2019 | Supports | 85 |
| NEK7 phosphorylation of cortactin modulates the migratory capacity of cells e... | Other | 2025 | Neutral | 80 |
| Proline conjugated chitosan as wound healing material: In vitro studies on th... | Other | 2023 | Supports | 80 |
| Keratinocyte Arginase1 Deficiency Impairs Healing and Antimicrobial Defence a... | Other | 2025 | Neutral | 75 |
| Efficacy of L-proline administration on the early responses during cutaneous ... | Other | 2013 | Supports | 75 |
| Fluorescent protein tags for human tropomyosin isoform comparison | Other | 2025 | Neutral | 70 |
| Wound healing and collagen formation. V. Quantitative electron microscope rad... | Other | 1965 | Supports | 70 |
| Tissue Engineered Elastic Cartilage-Mimetic Auricular Grafts for Ear Reconstr... | Other | 2025 | Neutral | 65 |
| Hydroxyproline: A Potential Biochemical Marker and Its Role in the Pathogenes... | Review | 2016 | Supports | 65 |
| Bioassembly of region-specific fibrocartilage microtissues to engineer zonall... | Other | 2025 | Neutral | 60 |
| The Story of the Fibrin(ogen) αC-Domains: Evolution of Our View on Their Stru... | Review | 2022 | Neutral | 60 |
| NHSL3 interacts with Ena/VASP proteins and the Scar/WAVE complex and promotes... | Other | 2025 | Neutral | 55 |
| Metabolomic Analysis, Antiproliferative, Anti-Migratory, and Anti-Invasive Po... | Other | 2025 | Neutral | 55 |
| Proteomic mapping of macrophages in response to the clearance of apoptotic ce... | Other | 2023 | Neutral | 50 |
| Transcriptional regulation of macrophage arginase 1 expression and its role i... | Review | 2013 | Neutral | 50 |
| Single-cell and spatial transcriptomics reveal the pathogenesis of chronic gr... | Other | 2025 | Neutral | 45 |
| Biological fate and clinical implications of arginine metabolism in tissue he... | Review | 2006 | Supports | 45 |
| Cell-autonomous metabolic reprogramming and oxidative stress underlie endothe... | Other | 2023 | Neutral | 40 |
| The wound healing process in surgical patients evaluated by the expanded poly... | Other | 1995 | Supports | 40 |
| HPLC-based kinetics assay for monitoring prolidase activity. | Other | 2025 | Supports | 35 |
| Auxin signaling in the cambium promotes tissue attachment and vascular develo... | Other | 2023 | Neutral | 35 |
| Lung basement membranes are compositionally and structurally altered followin... | Other | 2024 | Neutral | 30 |
| Efficacy of a spray compound containing a pool of collagen precursor syntheti... | RCT | 2010 | Supports | 30 |
| PRR14 Overexpression Promotes Cell Growth, Epithelial to Mesenchymal Transiti... | Other | 2019 | Neutral | 25 |
| The activator domain of bacterial collagenases drives collagen recognition, u... | Other | 2023 | Neutral | 20 |
| DPM1 through SERPINB5 modulates desmosomal adhesion and epidermal differentia... | Other | 2022 | Neutral | 15 |