{"id":805,"date":"2026-01-05T16:06:00","date_gmt":"2026-01-05T09:06:00","guid":{"rendered":"https:\/\/www.dokbuasee.com\/?p=805"},"modified":"2026-01-05T16:06:01","modified_gmt":"2026-01-05T09:06:01","slug":"zingiber","status":"publish","type":"post","link":"https:\/\/www.dokbuasee.com\/en\/zingiber\/","title":{"rendered":"Plai"},"content":{"rendered":"

Muscle aches, bruises, sprains<\/p>DOKBUASEE<\/cite><\/blockquote><\/figure>

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Plai<\/h2>

scientific name:<\/strong> Zingiber cassumunar<\/em> Roxb.<\/p>

Family name:<\/strong> Zingiberaceae<\/p>


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Botanical Characteristics<\/strong><\/p>\n\n

Plai is a perennial herbaceous plant growing approximately 0.7\u20131.5 meters tall. It has an underground rhizome with brownish-yellow skin. The fresh rhizome is yellow to yellow-green inside, juicy, and aromatic.
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\nThe plant grows in clumps, forming pseudostems from overlapping leaf sheaths. Leaves are simple, alternate, arranged in one plane, lanceolate to oblong-lanceolate, 3.5\u20135.5 cm wide and 18\u201335 cm long. The upper leaf surface is dark green, while the underside is lighter.
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\nThe inflorescence emerges directly from the underground rhizome. Bracts are reddish-purple with green margins, resembling lotus petals. The flowers are pale yellow, delicate, and visually striking. The fruit is a small, round, dry capsule containing many black, glossy seeds.
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\nThe aerial parts die back during the dry season, and new growth appears in the rainy season.
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Bioactive Compounds Related to Pain and Inflammation<\/h2>

Phenylbutanoids<\/strong><\/h2>

Research on phenylbutanoids.<\/strong><\/h2>

Research has identified phenylbutanoid compounds (numbers 1\u20136) isolated from Zingiber cassumunar rhizomes. These compounds were evaluated for their ability to inhibit cyclooxygenase-2 (COX-2) and reduce prostaglandin E\u2082 (PGE\u2082) production in mouse macrophage cells.<\/p>

COX-2 inhibition \u2192 reduced PGE\u2082 production \u2192 anti-inflammatory effect<\/strong><\/p>

Phenylbutanoid dimers (compounds 1 and 2) showed the strongest COX-2 inhibition, while monomers (compounds 3 and 4) demonstrated moderate activity.<\/p>\n\n

Plai contains natural anti-inflammatory compounds, with dimeric structures exhibiting stronger activity than monomeric forms.<\/p>\n\n
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Additionally, phenylbutanoid-enriched extracts of Z. cassumunar (PZEs) were shown to inhibit nitric oxide (NO) production in mouse macrophages, further supporting their anti-inflammatory potential.<\/p>

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Volatile Oils \/ Essential Oil Constituents<\/strong><\/h2>

Plai contains essential oils that may help relieve irritation and pain when applied topically by providing a cooling or soothing sensation. Key components include:<\/p>

  • Sabinene<\/li>\n\n
  • Terpinen-4-ol<\/li>\n\n
  • \u03b1-Pinene, \u03b2-Pinene, Myrcene, Limonene, \u03b3-Terpinene, p-Cymene
    These compounds are believed to possess anti-inflammatory and counter-irritant properties, which may help reduce short-term pain perception through topical application.<\/li><\/ul>

    Traditional Thai Medicinal Uses of Plai<\/h2>

    Leaves<\/b>: Bitter taste; relieve general body aches and fatigue<\/p>\n\n

    Flowers<\/b>: Bitter; reduce internal bruising, disperse blood clots, promote circulation, eliminate stagnant blood<\/p>\n\n

    Stems<\/b>: Astringent and bitter; treat digestive disorders and imbalance<\/p>\n\n

    Roots<\/b>: Bitter; help relieve nosebleeds, blood vomiting<\/p>\n\n

    Rhizomes: Astringent and bitter; widely used to\nRelieve numbness and muscle pain,\nTreat abdominal pain, diarrhea, dysentery,\n\nReduce inflammation of the intestines,\n\nRelieve sprains, strains, ankle injuries,\n\nTreat skin conditions, boils, wounds,\n\nAct as a local anesthetic,\n\nRelieve muscle aches and joint pain,<\/p><\/div>

    Research-Based Benefits of Plai<\/h2>

    Anti-inflammatory Effects<\/strong><\/h2>

    Purified compounds from plai, such as (E)-1-(3,4-dimethoxyphenyl) butadiene (DMPBD), were tested in mice with ear and paw edema. Results showed significant reduction in swelling\u2014more effective than some conventional anti-inflammatory drugs, with peak effects observed within 30 minutes.<\/p>

    Another compound, (E)-4-(3\u2032,4\u2032-dimethoxyphenyl)but-3-en-1-ol (Compound D), was studied in rheumatoid arthritis models. It reduced inflammatory cytokines (IL-1\u03b2), decreased matrix metalloproteinases (MMPs), and helped protect cartilage from degradation.<\/p><\/div>

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    Antioxidant and Cell-Protective Effects<\/strong><\/h2>

    Phenylbutenoid extracts (PE) from plai rhizomes demonstrated: Reduced inflammatory mediators (NO, TNF-\u03b1, IL-1\u03b2)\n,Decreased reactive oxygen species (ROS)\n,Inhibition of inflammatory signaling proteins (p38, ERK, Akt)\n,Prevention of apoptosis (cell death)<\/p>\n\n

    These findings indicate strong antioxidant and anti-inflammatory properties with protective effects on cells.<\/p><\/div>

    Pain-Relieving Effects<\/strong><\/h2>

    Compound D was tested in mice using an acetic acid\u2013induced pain model. The compound significantly reduced abdominal writhing responses, indicating effective analgesic activity related to inflammatory pain.<\/p>

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    Clinical Applications for Pain Management<\/strong><\/h2>

    Plai oil vs. Diclofenac gel (1%)\nIn patients with myofascial pain syndrome, plai oil significantly improved neck flexion and extension within 3 days. Pain relief was comparable to diclofenac gel.<\/p>

    Plai compress vs. placebo and NSAIDs\nPlai herbal compresses reduced pain significantly more than placebo and showed comparable effectiveness to NSAIDs.<\/p>\n\n

    Though improvements in flexibility and quality of life were similar to placebo.<\/p><\/div>

    Plai cream vs. Diclofenac gel\nNo statistically significant difference (p < 0.05). Plai cream showed slightly better outcomes in pain reduction and daily activity performance.<\/p>

    Plai balm for diabetic neuropathic pain\nA 15% w\/w plai balm significantly reduced pain scores by at least 50% in 75% of patients, compared to 20% in the placebo group (p = 0.004).\n\n

    Conclusion:\nPlai balm is effective and safe for reducing neuropathic pain in diabetic patients.<\/p><\/div>

    Safety Profile<\/strong><\/h2>

    Toxicity studies in animals showed:<\/p>

    • Single oral dose of 5,000 mg\/kg: no toxicity or mortality<\/li>\n\n
    • Repeated administration for 270 days (up to 1,125 mg\/kg\/day): no toxic effects<\/li>\n\n
    • No abnormal findings in physical examinations or histopathology of organs<\/li><\/ul>

      Plai extracts demonstrate high safety and good tolerance in both short- and long-term use.<\/p>

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