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The 2025 review in the International Journal of Molecular Sciences represents the most comprehensive English-language synthesis of this body of research to date

It revitalizes skin by supporting collagen and elastin production and reducing visible signs of aging, while also creating the optimal environment for healthy follicle activity and visible hair

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But as far as humans go, high-quality studies are still needed to confirm if vitamin B-12 injections can actually contribute to weight gain

However, the nature of the interaction between Candida albicans and gut bacteria remains unclear