August 2025 in “Nutrition and Health” In this systematic review, researchers linked higher vitamin D and iron levels to reduced alopecia, while increased alcoholic and sugary beverage intake was correlated with greater hair loss, highlighting the impact of diet on hair health.
2 citations
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January 2015 in “Jounal of The Korean Society of cosmetology” This study found that combined intake of enzyme food and collagen was more effective than either alone in improving scalp hair properties in middle-aged women.
49 citations
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July 2021 in “Nutrients” This review explores lifestyle modifications for women with polycystic ovary syndrome, discussing dietary, physical, and supplementation strategies, but reports no new clinical results.
This study found that a combined intake of enzyme food and collagen significantly improved various aspects of hair health in middle-aged women compared to taking either supplement alone or none.
February 2025 in “Journal of Nutrients” This research reviews the scientific literature on bone broth extract, exploring its nutritional composition, potential health benefits, food industry applications, and risks such as heavy metal and antibiotic contamination. Results are not reported in this summary.
3 citations
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May 2018 in “Journal of nutritional health & food science” This review discusses the potential of a low-dose comprehensive cyclical nutrient therapy for enhancing hair growth and strengthening hair roots, but reports no new experimental results.
1 citations
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June 2023 in “International Journal of Scientific Research in Science and Technology” The researchers highlighted the nutritional benefits of kiwifruit, noting its high vitamin C content, dietary fiber, and potassium, as well as its wealth of phytochemicals and antioxidants, which may aid immune function, digestion, and potentially reduce chronic disease risk.
March 2024 in “Animal nutrition” This study found that sows consuming beet pulp had higher feed intake and improved litter performance during heat stress, while a high-fiber diet enhanced insulin levels, suggesting dietary fiber's importance for reproductive and metabolic health in sows.
This study found that bariatric surgery patients with a prescription for supplements had fewer nutrient deficiencies and less hair loss 12 months post-operation compared to those without supplements.
9 citations
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February 2022 in “Biomolecules” This review concludes that while many epidemiological studies suggest high alcohol intake is associated with an increased risk of prostate cancer, the evidence may be affected by confounding factors such as diet and lifestyle.
1 citations
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May 2019 in “Annals of Medicine” In this study, researchers found that most food supplement labels in Portugal recommend daily mineral doses exceeding the EU's Recommended Daily Allowance, with some even surpassing the Tolerable Upper Intake Level, raising safety concerns regarding potential adverse effects.
5 citations
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October 2021 in “Clinical, cosmetic and investigational dermatology” In this study, Japanese patients with alopecia areata were found to have higher BMI and retinol intake, with retinol intake predicting severity of hair loss.
October 2021 in “DOAJ (DOAJ: Directory of Open Access Journals)” This study found that Japanese patients with alopecia areata had higher body mass index and retinol intake, with retinol intake being a predictor of hair loss severity.
50 citations
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March 1992 in “PubMed” This review discusses the clinical manifestations of malnutrition in children, particularly highlighting the overlapping skin changes from various nutrient deficiencies, and reports no new clinical results.
11 citations
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September 1999 in “Biological Trace Element Research” This study concluded that mineral element deficiencies in pregnant women may be alleviated with targeted nutrient supplementation, although mutual resistance and promotional effects among the supplements were observed.
August 2024 in “Frontiers in Nutrition” In this study, higher dietary antioxidant intake was linked to a decreased risk of androgenic alopecia, while higher dietary inflammatory intake increased the risk, especially among women, although these links were influenced by metabolic syndrome presence.
16 citations
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January 2018 in “International journal of trichology” This study observed that individuals with premature hair graying had lower levels of certain serum nutrients and lifestyle factors like stress and smoking may contribute; hair oiling appeared protective.
5 citations
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November 2024 in “Frontiers in Nutrition” In this randomized controlled trial, oral intake of the probiotic Latilactobacillus curvatus LB-P9 significantly improved hair luster, elasticity, and participant satisfaction in individuals with mild to moderate hair damage compared to placebo, without significant adverse effects reported.
This study found that DNA damage in obese women was linked to serum 25-hydroxyvitamin D and hair chromium levels, with higher serum vitamin D associated with less damage and higher chromium with more damage.
70 citations
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June 2010 in “Clinics in Dermatology” This review discusses how changes in hair and skin may indicate underlying vitamin deficiencies and emphasizes the need to identify populations at risk for these deficiencies; it reports no new results.
2 citations
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July 2018 in “Elsevier eBooks” This review discusses commonly used dietary supplements for hair growth and highlights the lack of evidence supporting their efficacy and safety in the absence of nutritional deficiency; it reports no new research results.
February 2026 in “Animals” In this study, supplementing low-protein diets with 0.75% methionine maintained growth performance, improved fur quality, enhanced nutrient utilization, and supported intestinal microbiota balance in blue foxes, with significant results on several biochemical parameters and nutrient digestibility observed.
April 2025 in “Medical Science” This review of existing clinical studies suggests that the ketogenic diet may help women with PCOS improve insulin sensitivity, reduce hyperandrogenism, and lose weight, although its long-term safety and hormonal impact require further investigation.
February 2021 in “Austin journal of nutrition & metabolism” This study found that among university students, both low and high zinc levels were associated with significant hair loss, while these zinc concentrations did not significantly impact other health issues like diarrhea, acne, or weight loss.
April 2007 in “CRC Press eBooks” This article discusses various vitamin deficiencies and their neurological implications without providing new clinical results; it serves as an informative chapter on nutrient-related neurological conditions.
March 2000 in “Preventive Nutrition and Food Science” This study suggests that biotin-rich functional food may stimulate hair growth and prevent hair loss through improved cholesterol and lipid metabolism and blood flow in men.
September 2023 in “F&S reports” This review examines theories linking PCOS with psychiatric disorders, highlighting dietary interventions like probiotics and nutrients as possible improvements, but reports no new clinical findings and calls for more research.
54 citations
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April 2007 in “Gastroentérologie clinique et biologique” This review highlights that bariatric surgery can increase nutritional deficiencies in morbidly obese patients, with particular emphasis on the risks of deficiency due to reduced food intake and malabsorption.
April 2025 in “Journal of Clinical Medicine” In this study, women with suspected PCOS who reduced their intake of sweets, fatty red meat, and alcohol for over 6 months showed significantly lower total testosterone levels compared to those who did not, highlighting the benefit of targeted dietary changes on hormonal profiles.
August 2022 in “Italian Journal of Animal Science/Italian journal of animal science” This study found that supplementing Angora goats with whole field bean seeds postpartum did not prevent weight and body condition losses but was associated with improved mohair growth and kid weight gain, likely due to better nutrient partitioning towards lactation and hair growth.