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You may have a deficiency if you are vegan, dont eat enough B12 rich food, or if you have other health conditions which mean you are unable to absorb it properly, such as pernicious anaemia

This effect is particularly noted with nasal spray use, which may be due to the higher dosages needed compared to subcutaneous injections [16]

Goal: Support metabolic homeostasis, insulin sensitivity, and age-related physical performance based on preclinical evidence [1] [2] [4]

However, some protocols may require multiple pens to complete a full course

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The difference is that peptides are smaller, more targeted, and act as messenger molecules that communicate with certain cells/tissues and tell them what to do