are b12 tablets better than injections vs Oral Supplements: Which more effective? What Are B12 Injections? And
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Easy to use and quickness

Difficulty with Memory or Concentration Vitamin B12 deficiency may affect brain function and contribute to difficulty with memory, focus, or concentration

It makes it appropriate for a different use case: the person who already controls their diet, exercises consistently, and wants a modest additional push in fat mobilization without the gastrointestinal side effects, nausea, or hormonal disruption that come with GLP-1 agonists

Some more tech stuff below, for the experienced or just more curious readers
