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PubMed Beyond the core mass-builders, Cutler rounds out his stack with a wide set of support supplements, a probiotic and multivitamin for the foundation, vitamin D3 and curcumin for hormones and joints, B-complex and niacin for energy and circulation, L-carnitine and a thermogenic for his fasted cardio, ZMA for sleep, a natural testosterone booster, a glucose disposal agent for his high-carb meals, glucosamine-based joint support, and nitric-oxide pump products for training intensity.

(Riederer 2020) May inhibit L-type calcium channels

Guan M-J, Zhao N, Xie K-Q, Zeng T