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Studies have shown that L-carnitine supplementation can improve cognitive function, memory, and attention span
1 Introduction Parkinsons disease (PD) is the second most common chronic neurodegenerative disorder (NBD) after Alzheimers disease (AD), with a progressive loss of motor, cognitive, and autonomic ( In the spectrum of parkinsonian disorders, attempts to classify disease subtypes based on cluster of clinical features have been made ( GBA1 -associated PD is increasingly recognized and studied as an entity with earlier onset and rapid progression (Figure 1)
The 2025 systematic review noted that despite increasing clinical use, this level of evidence does not yet exist
Journal of Microbiological Methods
More studies are needed, though, and vegan collagen supplements are not yet readily available
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