HMB vs Leucine for Preventing Muscle Breakdown During a Cut

1 week, 5 days ago Essential Supplement Reviews
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LeannessLab Guest
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Apr 03, 2026 18:42

I am currently in a deep calorie deficit to get ready for a photoshoot and I am terrified of losing my muscle mass. I have been researching HMB and Leucine as anti catabolic supplements. I know that Leucine is the main driver of protein synthesis but HMB is supposed to be better at preventing breakdown.

Which one do you think is more effective when calories are low? I am training in New York and I am doing a lot of fasted cardio in the morning. I am wondering if taking HMB before my cardio sessions would be a good idea to protect my gains.

Has anyone used HMB during a contest prep or a harsh cut? I would love to know if it made a noticeable difference for you. I am trying to keep as much size as possible while getting my body fat down to single digits.

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