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JJ Virgin (YouTube, Feb 16, 2023) discusses balancing fasting with adequate protein intake and muscle-building cycles. She warns that people low in skeletal muscle may struggle to meet protein needs while fasting and that fasting suppresses mTOR activation, which is required for muscle growth. Fasting is presented as a tool to restore insulin sensitivity, improve blood sugar balance, and trigger cellular benefits (detox, increased BDNF, growth hormone, stem cell production), but it should be alternated with periods focused on building skeletal muscle to preserve metabolism.

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