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Pills may be less expensive upfront, but their lower absorption rate means you might need to take more of them to achieve the same benefits as a shot
Nature communications , 11 (1), 5205
Causing fatigue, skin pallor, shortness of breath, and dizziness
They act as signalling molecules that send messages between cells and tissues to perform specific biological functions such as hormone release, tissue repair, fat metabolism, and muscle growth
Poor oral bioavailability it breaks down quickly in stomach acid, often requiring subcutaneous injections
The evidence: Unapproved peptides have little, if any, human clinical trial data supporting safety or efficacy
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