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Sleep Optimization and REM Enhancement One of MK-677s most consistent and underrated benefits is its ability to deepen sleep , particularly increasing time spent in REM (Rapid Eye Movement) and deep sleep (Stage 3/4)

In the STEP-4 randomized trial (Rubino and colleagues, JAMA, 2021), the 803 adults who switched to placebo at week 20 regained about 6.9 percent of body weight over the next 48 weeks, while those who continued semaglutide kept losing

TB-500 persists substantially longer, with its activity described in terms of days

found that fast escalation to 8 mg produced GI adverse events in 50% of participants, compared to roughly 35% with gradual titration (Rosenstock et al., Lancet, 2023)