The honest answer is different things, complementary rather than substitutable
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Studies show that the body produces NAD+ through three main biosynthesis pathways
Functional Medicine Perspective From a functional medicine viewpoint, IGF-1 LR3 fits into a broader strategy for: Preserving muscle mass Supporting injury recovery Enhancing metabolic flexibility Countering age-related decline This approach combines peptide therapy with: Anti-inflammatory nutrition Resistance training Sleep optimization Micronutrient support Conclusion IGF-1 LR3 is a powerful, long-acting analog of insulin-like growth factor 1 that enhances recovery, stimulates muscle growth, and supports tissue repair far beyond the capacity of natural IGF-1 alone
10.1136/gutjnl-2019-318717 Gut
Glutathione rich foods include: Avocado Spinach Broccoli Asparagus Okra Garlic Turmeric These foods help the body maintain baseline production, but under stress, aging, or skin concerns, dietary intake alone is usually insufficient