Microneedling the scalp before application is a common practice to improve delivery, and some limited evidence supports this approach
GHK-Cu activates Wnt/-catenin signaling to promote hair follicle cycling in human dermal papilla cells
NAPQI is neurotoxic : Crosses the placenta, depletes fetal brain glutathione, generates oxidative stress, and triggers cell death in neural tissue at doses below those causing maternal liver toxicity
Supports immune, bronchial & respiratory health Encourages liver health & function Helps replenish the bodys supply of glutathione , a powerful antioxidant N-acetyl-L-cysteine is an easily absorbed nutrient with powerful benefits for whole body health
10.1016/j.phymed.2019.152871 63 JiangB.ChenJ.XuL.GaoZ.DengY.WangY.et al (2010)
As these injections are processed through the liver, so your liver should be perfectly healthy, Any complication in liver functioning can impact effectiveness of whitening injections and increase risk of side effects