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However, B12 shots are less likely to increase energy or performance when B12 levels are already normal

Standard TRT alone suppresses natural testosterone production via the hypothalamic-pituitary-gonadal axis, reducing luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which leads to decreased sperm production and potential infertility

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If you are concerned about acne whilst taking B12 supplements, it is advisable to discuss this with your GP rather than discontinuing treatment without medical guidance, particularly if the B12 has been prescribed to address a documented deficiency