Freckles develop when certain areas of the skin produce extra pigment after sun exposure, often leading to uneven tone and dark spots that feel difficult to fade
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Disclaimer References Wilding JPH, Batterham RL, Calanna S, et al
This difference is at least partially attributable to a decreased level of inflammation, oxidative stress and endoplasmic reticulum (ER) stress, Glutathione (GSH) depletion, peroxynitrite formation, hepatocyte apoptosis, elevated hepatocyte proliferation, activation of 5-HT2B receptor, less activated c-Jun NH 2 -terminal kinase (JNK) and hypoxia-inducible factor (HIF)-1 in the mice sufficient of 5-HT versus mice deficient of 5-HT