Avoiding tight clothing over the tattoo, and ensuring your clothing doesnt rub against your healing flesh
One source I read about a certain type of carnitine deficiency was interesting
Capsules: Glutathione Blend L-Glutamic Acid 180mg Glycine 200mg L-Cysteine 120mg Glutathione Boosters NAC 100mg Vitamin C 100mg Alpha Lipoic Acid 50mg Grapeseed Extract 25mg Inactive Ingredients: Vegetable Capsule Soap: Refined Coconut oil, Sodium Palmitate, water, Glutathione Powder, Alpha Lipoic Acid, Glycerin, Rose hip Oil, Ascorbic Acid, Vitamin E, Fragrance
Based on my online research, combined with my own experience and findings, I would say, as a general rule, a per cell rating of between 0-6 m is as good as it gets