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41 Efficiency: the ease of falling and returning to sleep, measured as the proportion of intended sleep time that is actually spent sleeping
Why Choose Collagen or Glutathione
Less common systemic effects that some users report include mild dizziness or lightheadedness, temporary nausea, mild headache, and occasional fatigue
For storage duration: reconstituted GHK-Cu lasts 21-28 days refrigerated with bacteriostatic water, shorter than most peptides due to copper oxidation concerns
This is unknown, but ~12-24 hours may often be reasonable
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