August 2026 in “Zenodo (CERN European Organization for Nuclear Research)” In this N=1 case study, a long-term zero-carbohydrate diet adult male experienced an increase in fasting plasma ascorbic acid from 0.1 mg/dL to 2.0 mg/dL within two months of daily 1 g vitamin C supplementation, along with subjective health improvements.
August 2026 in “Zenodo (CERN European Organization for Nuclear Research)” In this N=1 case study, researchers observed that a 1 g daily dose of vitamin C successfully elevated plasma vitamin C levels in an adult male following a zero-carbohydrate diet, with reported improvements in some health parameters but no gastrointestinal side effects.
December 2025 in “International Journal of Clinical Medical Research” This review explores the role of nutrition and probiotics in enhancing skin, hair, and nail health through gut microbiota, highlighting the potential of nutritional interventions for cosmetic benefits via the gut-skin axis.
Hair can show daily calcium changes, linked to body calcium levels and influenced by hormones, and can help assess calcium metabolism issues.
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August 2022 in “JAAD international” This study reviews the impact of supplementation on hair growth in nonscarring alopecia using baseline and follow-up laboratory data but reports no new clinical results.