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Sustainable weight loss could be achieved through safer and more proven methods
The longer someone uses tirzepatide, the greater their risk of developing B12 insufficiency or outright deficiency
Vitamin B12 injections can go into your muscle, under your skin, or through a vein
The FDA's 2024 review found no published human pharmacokinetic study that formally characterized the subcutaneous route, so these amounts are anecdotal rather than an approved clinical protocol
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