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That's a reasonable combination to look for in a product, though it doesn't turn a modest effect into a dramatic one

Sleep and Systemic Recovery Sermorelin improves sleep architecture, particularly enhancing slow-wave (deep) sleep, which is essential for systemic recovery

"Statins and outcome after hospitalization for COPD exacerbation: a prospective study." PulmPharmacolTher (2011) 24:625-631

However, unfortunately, vitamin B12 deficiency is somewhat common, especially in the elderly, strict vegans, and people on antacid medications, so I dont mean to downplay the importance of vitamin B12 or the B vitamins more generally