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However, B12 shots may support weight loss efforts in ways that matter during a structured program
That means the peptide stays intact as it enters the system
Evidence snapshot: The strongest human evidence comes from a 2-year randomized controlled trial in 65 healthy older adults (Nass et al., 2008, Annals of Internal Medicine) showing sustained GH/IGF-1 increases and preserved fat-free mass, plus an earlier short-term human polysomnography study on sleep (Copinschi et al., 1997, Neuroendocrinology, PMID 9349662)
After 8 weeks we recommend doing further testing, to confirm normalisation of blood counts
Among the effects of glutathione, studies have also highlighted its potential to prevent nerve damage caused by the cancer drug cisplatin