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B12 Injections for Weight Loss in the UK

Author: Analgesia logo

Last Updated on March 16, 2025 by Analgesia team

B12 injections have gained popularity as a weight loss aid, with claims that they can boost metabolism, increase energy levels, and promote fat burning. But do they work? In this guide, we’ll explore how B12 injections affect weight loss, their benefits, potential side effects, and how to get them safely.

Vitamin B12 plays a crucial role in metabolism and energy production. It helps convert food into glucose, which fuels your body’s activities. People with B12 deficiencies often experience fatigue, sluggish metabolism, and difficulty losing weight. By restoring optimal B12 levels, some individuals report increased energy and improved metabolic function.

b12 injections for weight loss UK

While B12 itself does not directly cause weight loss, it can support weight management in several ways:

  • Boosts Energy Levels – More energy can lead to increased physical activity and calorie burning.
  • Supports Fat Metabolism – B12 aids in the breakdown of fats and proteins.
  • Reduces Fatigue and Brain Fog – Helps maintain focus and motivation for exercise.

However, for B12 injections to be effective for weight loss, they should be combined with a balanced diet and regular exercise.

  • Improves metabolism and digestion
  • Supports red blood cell production, reducing fatigue
  • It may enhance mood and motivation to stay active
  • Helps prevent anemia, which can cause weakness and low energy

B12 injections are generally safe but can cause mild side effects such as:

  • Pain or swelling at the injection site
  • Mild diarrhea
  • Dizziness or headaches

People with certain medical conditions, such as kidney disease or Leber’s disease, should consult a doctor before taking B12 injections.

B12 injections may be beneficial for:

  • Individuals with a B12 deficiency
  • People following a vegan or vegetarian diet
  • Those experiencing chronic fatigue
  • People struggling with slow metabolism

If you already have sufficient B12 levels, injections may not provide significant weight loss benefits.

B12 injections are available via:

  • Doctor’s Prescription – Consult a healthcare provider for dosage and administration.
  • Weight Loss Clinics – Some offer B12 as part of a fat-burning treatment. A popular brand that offers this service is Click Pharmacy.
  • Self–injection kits are available online, but should be used with caution.

A typical dosage ranges from 1000 mcg per week, but it’s best to follow professional guidance.

B12 injections can support weight loss by boosting energy and metabolism, but they are not a magic solution. To see real results, combine them with a healthy diet and regular exercise. Always consult a doctor before starting B12 injections to ensure they are right for you.


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