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Mother Nature put it there for a reason
Peptides degrade when exposed to incorrect temperatures or light
Skin penetration depends on formulation, concentration, and application technique
Once-daily dosing offers simplicity and better compliance, while split dosing theoretically maintains more stable tissue concentrations throughout the day
The two aren't necessarily competitors
In contrast, substances that have carrier-mediated uptake mechanisms, such as glucose and amino acids, fall well above the dotted line
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