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This study found that while pro-, pre-, and synbiotics may have beneficial effects on certain PCOS-related outcomes, the certainty of this evidence is low to very low.

This article reviews evidence suggesting that vitamin D may help manage Hashimoto’s thyroiditis by affecting immune pathways and improving thyroid function, though more research is needed to fully understand its therapeutic potential.

This review discusses zinc's role as an essential trace element in human nutrition, particularly its importance in total parenteral nutrition, and reports no new clinical results.

In this study, a 6-month randomized controlled trial with postmenopausal women reported that supplementing with soy protein isolate with isoflavones led to significant improvements in skin hydration and reduced wrinkles and facial pigment intensity, but did not affect sebum production.

This study found that biotin supplementation is common among patients at a dermatology clinic despite a lack of evidence for its dermatologic benefits and potential interference with lab tests.

This review found that both oral and topical soy-based products showed positive effects on various skin-related outcomes, including aging signs and skin barrier function, but topical applications were more likely to improve skin barrier status compared to oral supplementation.

This case study identified low iron stores, potentially linked to heavy menstrual periods, as a trigger for diffuse nonscarring alopecia in a 31-year-old woman, leading to a diagnosis of telogen effluvium, for which iron supplementation was prescribed.

This report details a case of severe protein-energy malnutrition resembling kwashiorkor in a 43-year-old woman after bariatric surgery, highlighting the crucial role of early diagnosis and a multidisciplinary approach in managing nutritional complications and improving outcomes in similar patients.

This study, conducted in Indramayu, Indonesia, reported that iron supplementation significantly increased hemoglobin levels in infants, while zinc supplementation reduced persistent diarrhea risk but increased susceptibility to runny nose and measles; complex interactions with diet warrant further investigation.

Intermittent iron and nutritional supplements can help reduce hair loss.

This study discusses the potential association between low vitamin D levels and insulin resistance, suggesting that vitamin D deficiency may contribute to disorders like obesity and diabetes, but emphasizes the need for further research to confirm these links.

This study suggests that behavior modification, semistarvation ketogenic regimens, and surgical therapy could be experimental approaches for different degrees of obesity, with their efficacy varying by the degree of weight excess.

This study found that antibiotic-induced gut dysbiosis, particularly overgrowth of Lactobacillus murinus, can lead to hair loss in mice by depleting biotin.

This study observed that zinc deficiency in humans and mice was associated with diminished allergic contact dermatitis but increased severity and duration of irritant contact dermatitis.

This review discusses nutritional factors important for hair growth and the need to assess and address deficiencies in cases of alopecia, but does not report new clinical results.

This review discusses causes of hair loss in cats, highlighting self-inflicted trauma due to flea allergy dermatitis, and presents no new clinical findings.

This review examines rodent models to explore how maternal conditions like undernutrition, obesity, hypoxia, and androgen exposure affect fetal programming and metabolic outcomes in offspring, but presents no new clinical findings.

This article recommends assessing serum ferritin and vitamin D levels in patients with diffuse hair loss before starting treatment, but it reports no new clinical results.

This book chapter discusses the mechanisms and prevention of selenium toxicity in livestock and reports no new experimental results; it emphasizes reducing selenium in the human food chain through animal products.

This study found that magnesium supplementation significantly improved overall quality of life in women with polycystic ovary syndrome, but did not significantly affect acne, alopecia, or abnormal uterine bleeding.

This study found that dietary supplementation with 0.2% MSM improved hair quality in kittens and had no significant negative effects on their growth performance, antioxidant capacity, or gut microbiota.

This study found that loss of the folliculin protein delays transferrin receptor recycling, leading to iron deficiency and suggesting a role in the mechanisms of Birt-Hogg-Dubé syndrome.

In this study, oral supplementation with NMN for 12 weeks in middle-aged Japanese women significantly increased hair growth density and diameter and improved subjective assessments of hair texture and quality of life, with no significant changes in hair hormone concentrations observed.

This study found that vitamin D supplementation in diets of Rex rabbits improved hair follicle development and fatty acid metabolism, with 1400–2100 IU/kg proving most effective for hair density and 2800 IU/kg increasing hair length.

In this review, skin changes like hair loss and brittle nails linked to nutritional deficiencies common in eating disorders are examined as critical diagnostic tools, highlighting the need for integrated care involving dermatologists, psychiatrists, and nutritionists for effective management.

This study reported that mannan oligosaccharides improved the fur quality, immune response, antioxidant status, and gut microbiota of fur-growing raccoon dogs, suggesting they could potentially replace antibiotics in their diet.

Eating a balanced diet with the right vitamins and minerals is important for healthy hair, but too many supplements can be harmful.

This systematic review found no consistent evidence supporting the effectiveness of biotin supplementation for alopecia treatment unless there is a documented deficiency.

This study found that switching juvenile mice from a high-fat, high-carbohydrate diet to a control diet optimally reduced hormonal imbalances and weight, with nutraceuticals offering partial support.

This study highlights that polycystic ovary syndrome develops through genetic and environmental factors, with insulin resistance as a key mechanism, impacting the risk of metabolic and cardiovascular conditions.