What was always missing from the conversation was a deeper look at what the follicle actually needs to function well
Dietary sources of B12, such as meat, fish, and dairy products, provide most people with enough of the vitamin
Products containing fragrance, essential oils, high concentrations of actives (retinoids, strong acids, vitamin C at low pH), or heavy occlusive agents can cause irritation, granulomas, or pigment problems when driven into the dermis
But most studies that report poor tolerance started subjects at doses two to three times higher than necessary
JP patent 59,034,899 Kyowa Hakko Kogyo Co