This ingredient may not be fungal acne safe
Although NAC could potentially improve glutathione levels and alleviate oxidative stress, this issue is controversial [43-45]
Sasaki, S., Iwata, H., Ishiguro, N., Habuchi, O
But once you add water back, freezing creates ice crystals that can physically disrupt the peptide molecules
There is no reliable way to test potency at home, so your results will tell you whether the peptide is still effective
This mechanistic complementarity means combining the peptides addresses more healing pathway simultaneously than either alone