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Open research questions in Phytochemistry and biological activity of medicinal plants

76 gap statements mined from Phytochemistry and biological activity of medicinal plants papers in our 4.5M-paper local library, which holds 265 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The observational design does not allow for causal inference. Potential baseline differences in microbial communities or unmeasured soil properties may influence the results. Future controlled experiments are needed to establish causal relationships.

    Soil salinity alters acemannan content and sodium uptake in Aloe barbadensis Miller plants. A role for root-associated microbial communities? · 2026 · DOI

  • Controlled experiments manipulating salinity levels with replicated randomized plots are needed to establish causal relationships. Further characterization of the composition and structure of soil microbial communities in response to salinity is needed. Investigation of the relationship between acemannan and sodium accumulation in other plant species is needed.

    Soil salinity alters acemannan content and sodium uptake in Aloe barbadensis Miller plants. A role for root-associated microbial communities? · 2026 · DOI

  • The need for effective antimicrobial ointments for skin infections. The potential of herbal plants in treating skin infections. The lack of dosage accuracy in semi-solid dosage forms.

    FORMULATION AND EVALUATION OF ANTIMICROBIAL OINTMENT USING CASSIA TORA AND AERVA LANATA EXTRACT · 2026 · DOI

  • The need for modern and sophisticated instrumental methods like HPTLC to standardize herbal drugs. The lack of a simple, specific and accurate HPTLC method for fingerprint analysis of Cassia occidentalis.

    HIGH PRESSURE THIN LAYER CHROMATOGRAPHY FINGERPRINTING ANALYSIS OF AN AYURVEDIC HERB KASAMARDA MOOLA - CASSIA OCCIDENTALIS (ROOT) · 2026 · DOI

  • Current treatments for nasopharyngeal carcinoma have limitations, and novel therapeutic strategies are needed. The antitumor effects of aloe emodin and its mechanism of action are not fully understood.

    Molecular mechanism of aloe emodin in combating nasopharyngeal carcinoma revealed through network pharmacology, molecular docking, and in vitro experiments · 2026 · DOI

  • Further investigations towards a promising lead compound are needed. Structure-activity relationship (SAR) studies could be conducted to optimize the anticancer activity of anthra[1,2-b]furans.

    Novel Aloe-Emodin Derivatives as Potential Anticancer Agents: Synthesis, Characterization and Cytotoxic Activity · 2026 · DOI

  • The need to identify natural prebiotic ingredients that can support probiotic growth and functional activity. The challenge of maintaining the viability and efficacy of probiotic bacteria in functional foods and nutraceuticals.

    PREBIOTIC EFFECTS OF CASSIA AURICULATA EXTRACTS ON GROWTH, VIABILITY, AND METABOLITE PRODUCTION IN LACTOBACILLUS ACIDOPHILUS: AN IN VITRO STUDY · 2026 · DOI

  • The need for natural prebiotic ingredients to support probiotic growth and functional activity. The lack of studies on the prebiotic potential of Cassia auriculata extract on Lactobacillus acidophilus growth.

    PREBIOTIC EFFECTS OF CASSIA AURICULATA EXTRACTS ON GROWTH, VIABILITY, AND METABOLITE PRODUCTION IN LACTOBACILLUS ACIDOPHILUS: AN IN VITRO STUDY · 2026 · DOI

  • There is a lack of research on the biological activity and healing properties of oak. The potential of oak to be applied in wound healing products is not fully explored.

    A NEW AGE FOR OAK, BIOLOGICAL ACTIVITY AND THE MIRACULOUS HEALING PROPERTIES · 2026 · DOI

  • The study suggests that future research is needed to narrow down the pool of specific metabolites in both the plant and the gel. The study suggests that tests need to be rerun to provide more detailed results.

    Analysis and profiling of naturally occurring and processed Aloe vera using NMR spectroscopy · 2026 · DOI

  • There is a need for novel therapeutic alternatives for the treatment of depression. Conventional antidepressants have limitations, leading to increased interest in plant-based therapeutic alternatives.

    Evaluation of Antidepressant Activity of Ethanolic Leaf Extract of Senna auriculata (L.) Roxb Using Behavioral, Biochemical, Histopathological, and In Vitro Approaches · 2026 · DOI

  • There is a need for safer and more effective therapeutic strategies for colon cancer. The preclinical safety and efficacy of Hydroquinidine in colorectal cancer are not well defined.

    Hydroquinidine Modulates Histopathological, Inflammatory, Apoptotic, EMT-Related, and PI3K/AKT/mTOR-Associated Markers in a DMH-Induced Rat Model of Colon Cancer · 2026 · DOI

  • The research gap is related to the lack of studies on the use of Aloe vera gel extract as a bioprotective agent against HNO₃-induced toxicity.

    Protective Effects of Aloe vera Gel Extract Against Cytotoxic, Genotoxic, and Physiological Damage Induced by Nitric Acid in Allium cepa Cells · 2026 · DOI

  • The lack of effective treatments for cracked heels. The need for a herbal anti-crack gel that provides a protective oily layer on the skin surface and keeps the skin hydrated.

    TO FORMULATE & EVALUATE HERBAL CRACK CREAM FOR HEALING & MOISTURIZING CRACKED SKIN · 2026 · DOI

  • The lack of safe and effective skincare products for daily use. The need for natural alternatives to conventional chemical-based soaps. The demand for skincare products that address skin tanning and other related issues.

    FORMULATION AND EVALUTION OF ANTI-TANNING HERBAL SOAP · 2026 · DOI

  • There is a need to optimize concentration, improve stability, and evaluate long-term antimicrobial efficiency of herbal hand sanitizers. Many commercial hand sanitizers contain alcohol and synthetic chemicals that may cause skin dryness, irritation, and discomfort with repeated use.

    FORMULATION AND EVALUATION OF HERBAL HAND SANITIZER USING NEEM AND TULSI · 2026 · DOI

  • The gap in current research is the lack of studies on the effectiveness of Aloe vera compress therapy in reducing body temperature in children with fever.

    Literatur Review : Terapi Nonfarmakologis Kompres Aloe Vera sebagai Upaya Penanganan Demam pada Anak · 2026 · DOI

  • The lack of effective natural emulsifiers in herbal creams. The need for a stable and effective herbal cream with wound healing and anti-inflammatory activity.

    Formulation and Evaluation of Lecithin Containing Herbal Cream · 2026 · DOI

  • The lack of herbal face washes that are effective in skin cleansing and antioxidant protection. The need for a face wash that is suitable for all skin types and has a pleasant fragrance.

    DEVELOPMENT AND EVALUATION OF ANTIOXIDANT HERBAL FACEWASH CONTAINING STAR FRUIT EXTRACT · 2026 · DOI

  • There is a growing interest in safe, plant-based skincare products. Conventional anti-ageing products may have synthetic additives that can be harmful to the skin.

    Formulation and Evaluation of Anti-Ageing Polyherbal Soap · 2026 · DOI

  • The study was conducted in a rat model. The highest dose tested (25 mg/kg) caused signs of hepatotoxicity. No significant alterations were observed in the remaining hematological parameters. Renal function markers remained within physiological ranges across all treatment groups.

    Hydroquinidine Modulates Histopathological, Inflammatory, Apoptotic, EMT-Related, and PI3K/AKT/mTOR-Associated Markers in a DMH-Induced Rat Model of Colon Cancer · 2026 · DOI

  • A complex web of obstacles stands in the way of the transfer of herbal ethosomes from labwww.wjpr.net │ Vol 15, Issue 13, 2026.

    HERBAL ETHOSOMES FOR ENHANCED TOPICAL AND TRANSDERMAL DELIVERY: FORMULATION STRATEGIES, THERAPEUTIC APPLICATIONS, CURRENT ADVANCES, AND FUTURE PERSPECTIVES · 2026 · DOI

  • Further evaluation of the ointment's efficacy in clinical trials. Investigation of the ointment's stability and shelf life. Exploration of other herbal plants for antimicrobial activity.

    FORMULATION AND EVALUATION OF ANTIMICROBIAL OINTMENT USING CASSIA TORA AND AERVA LANATA EXTRACT · 2026 · DOI

  • To optimize the concentration of Neem and Tulsi extracts to achieve maximum antimicrobial activity with good user acceptability. To evaluate the long-term antimicrobial efficiency of the herbal hand sanitizer. To develop other herbal hand sanitizers using different medicinal plants.

    FORMULATION AND EVALUATION OF HERBAL HAND SANITIZER USING NEEM AND TULSI · 2026 · DOI

  • Further evaluation of the optimized formulation for biological activity. Investigation of other natural emulsifiers for use in herbal creams. Development of herbal creams with enhanced stability and performance.

    Formulation and Evaluation of Lecithin Containing Herbal Cream · 2026 · DOI

Most-cited papers in Phytochemistry and biological activity of medicinal plants

Most recent work

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Open questions raised by papers listed on this page include: (1) Future controlled experiments are needed to establish causal relationships (“Soil salinity alters acemannan content and sodium uptake in Aloe barbadensis…”, 2026); (2) The lack of a simple, specific and accurate HPTLC method for fingerprint analysis of Cassia occidentalis (“HIGH PRESSURE THIN LAYER CHROMATOGRAPHY FINGERPRINTING ANALYSIS OF AN AYURVEDIC…”, 2026); (3) Current treatments for nasopharyngeal carcinoma have limitations, and novel therapeutic strategies are needed (“Molecular mechanism of aloe emodin in combating nasopharyngeal carcinoma…”, 2026); (4) Further investigations towards a promising lead compound are needed (“Novel Aloe-Emodin Derivatives as Potential Anticancer Agents: Synthesis,…”, 2026); (5) The lack of studies on the prebiotic potential of Cassia auriculata extract on Lactobacillus acidophilus growth (“PREBIOTIC EFFECTS OF CASSIA AURICULATA EXTRACTS ON GROWTH, VIABILITY, AND…”, 2026). 76 gap statements have been mined from Phytochemistry and biological activity of medicinal plants papers in our 4.5M-paper local library, which holds 265 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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