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Abstract Alzheimers disease (AD) is a progressive neurodegenerative disorder characterized by cognitive decline, memory impairment, and hallmark neuropathological features, including extracellular amyloid- (A) plaques and intracellular neurofibrillary tangles formed by hyperphosphorylated tau

[5] Typical initiation for primary or secondary hypogonadism in adult males is 100 mg to 200 mg injected intramuscularly every two weeks, though some clinicians favor 50 mg weekly to minimize peak-trough fluctuations

Radiat Oncol 16 , 43 (2021)

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Vitamin B12 provides a boost of energy and plays a key role in the digestion and metabolism of fats, proteins and carbohydrates

Research has also examined its role in circadian rhythm signaling and melatonin-related pathways , which are central to sleepwake regulation and endocrine timing in experimental systems