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The most significant improvements typically occur between weeks 4-12 of consistent use
While they are safe for many people, its important to consult with a healthcare provider to determine if they are appropriate for you, especially if you have any underlying health conditions or are on certain medications.
2017 Mar;95(3):323-333
What is more effective for aging skin, GHK-Cu or Matrixyl
* Correspondence: Zeyi Liu, [email protected]
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