can vitamin b12 injections cause weight gain & Loss: What the Evidence Says – Bolt Pharmacy Vitamin B12 Deficiency and Weight
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do not freeze [5]
The peptide mobilizes fatty acids from storage, and exercise provides the metabolic demand to oxidize those fatty acids for energy, potentially creating a synergistic effect

Jumping directly to 100mg without a ramp-up period can trigger transient flushing, mild nausea, or subjective reports of 'jitteriness'

Energy homeostasis regulated by an adipocyte-derived hormone-- mechanism of leptin resistance and role of hypothalamic melanocortin signaling
