TLDR Sulphur, phosphorus, and metals are distributed differently in animal skin follicles, with variations in detection speed and location.
The study investigated the presence of sulphur, phosphorus, and metals in skin follicles of rats, mice, and lambs. Radioactive sulphur was detected more quickly in rat and mouse follicles compared to lambs, likely due to the faster hair growth in these animals. Zinc was found concentrated in the unkeratinised part of the fibre, while copper was not detected. Potassium was present in the outer sheath, unkeratinised part of the fibre, and stratum corneum. Phosphorus was primarily located in the bulb, with smaller amounts in the unkeratinised part of the fibre.
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April 2018 in “Journal of trace elements in medicine and biology” Hair analysis can show nutritional status and environmental exposure, with phosphorus being very stable in hair and differences found based on gender and conditions like depression and autism.
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April 1989 in “Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms” Sulphur in hair follicles increases from the bulb and then levels off, while other elements vary in distribution.
