b12 injections or tablets Vitamin B Injections: Fast-Acting Energy, Nerve Health, Immune Boost — Tagged "Injection" — Mountainside Medical B12 Injections vs Oral Supplements:

Well, dont fall for the hype that theyll magically help you shed pounds or give you Tasmanian Devil-like energy levels

Doctors often talk about the dosage in mL, not just the vitamin B12 amount in micrograms (mcg)

Central concepts include the molecular properties required for topical penetration, distinctions between immediate antioxidant actions and longer-term remodeling, and trade-offs between topical products and injectable administration

(PubMed) Tangney CC, Tang Y, Evans DA, Morris MC

That being said, some people who have taken injectable vitamin B12 have complained of difficulty walking and balancing, nervousness, anxiety, weakness, lack of coordination, and even a sensation of pins and needles, per SFGate