Vitamin B12 is water soluble, meaning any excess is flushed out through the urine, and as a result, there's no real risk of overdose
Vitamin B12 can be taken orally or administered by injection
With all this in mind, Vitamin B6 is tricky one and one that I would not recommend self-prescribing
However, you should: Call 999 or go to A&E immediately if you experience signs of a severe allergic reaction (difficulty breathing, severe throat/facial swelling, or collapse) Contact your GP if you experience a rash, itching, persistent pain at the injection site, or worsening neurological symptoms despite treatment If you suspect any side effects from your B12 injections, you can report them through the MHRA Yellow Card scheme (yellowcard.mhra.gov.uk)
Who is a good candidate for skinny shots
In short: the cell-culture data establishes biological plausibility for hair-follicle effects