Here you can find some scientific studies on the fulvic/humic acids

Journal of Diabetes Research

Study: “Therapeutic Potential of Fulvic Acid in Chronic Inflammatory Diseases and Diabetes”
Department of Biology, IKBSAS, University of British Columbia-Okanagan, Canada
Results in brief: fulvic acids show promise as a potential adjunct treatment for diabetes due to its anti-inflammatory and antioxidant effects.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC6151376/

Clinical, Cosmetic and Investigational Dermatology

Study: “Controlled study to evaluate the efficacy and safety of carbohydrate-derived fulvic acid in topical treatment of eczema“
Department of Pharmacology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
Results in brief: global response to eczema treatment with fulvic acid was significantly better than that with emollient therapy only.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC3173016/

MDPI

Study: “Characterization of Fulvic Acid Beverages by Mineral Profile and Antioxidant Capacity”
Institute of Quality Science, Poznań University of Economics and Business, al. Niepodległości 10, 61-875 Poznań, Poland
Results in brief: The results of the present study on beverages containing fulvic acids showed that they may contain substantial amounts of Fe (up to about 130% of RDA), Mg (up to about 40% of RDA), and Mn (up to about 70% of RDA). They can also be a good source of polyphenolic compounds (up to about 19.8 mg/mL) with high antioxidant activity.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC6963745/