The major issue that affects water-soluble vitamins from fat-vitamins is their sensitivity to being exposed to heat and light leading to degradation during cooking and food processing while fat soluble vitamins are relatively stable

Example: 180lb person (82kg) for injury recovery at 5 mcg/kg: 82kg 5mcg = 410mcg per day With 5mg vial + 2ml water = 2,500mcg/ml concentration Draw 0.16ml per injection 12 doses per vial HOW For injury recovery (sprains, tears, tendonitis): Dose: 400-600mcg per day Frequency: Split into 2 doses (morning and evening) Duration: 4-6 weeks minimum Injection site: Near injury OR systemic (abdomen) Results timeline: 2-3 weeks to notice improvement For gut health (IBS, leaky gut, ulcers): Dose: 200-400mcg per day Frequency: Once daily, preferably morning on empty stomach Duration: 6-12 weeks Injection site: Systemic (abdomen) Results timeline: 3-6 weeks For general wellness and prevention: Dose: 150-300mcg per day Frequency: Once daily Duration: Ongoing or 4-week cycles with 2-week breaks Injection site: Systemic (abdomen) Results timeline: Subtle, cumulative benefits Body weight-based dosing: 150 lbs (68kg): Low: 204mcg (3 mcg/kg) Medium: 340mcg (5 mcg/kg) High: 476mcg (7 mcg/kg) 180 lbs (82kg): Low: 246mcg (3 mcg/kg) Medium: 410mcg (5 mcg/kg) High: 574mcg (7 mcg/kg) 200 lbs (91kg): Low: 273mcg (3 mcg/kg) Medium: 455mcg (5 mcg/kg) High: 637mcg (7 mcg/kg) Start at the low end for your goal

Published lab preparations often used DMSO-containing vehicles for animal work
This peptide promotes cellular migration, reduces inflammation, and accelerates tissue recovery, all essential processes during concussion therapy
Thats why it is also referred to as cobalamin
There are a few nootropic supplements specifically designed for children, but we dont know enough about the impact of nootropic supplements on developing brains they very well may be negatively impacted