. Chapters 0:00 Introduction 0:46 Pale or Yellowish Skin 1:02 Fatigue 1:20 Needle-like Sensations 1:38 Difficulty in mobility 1:55 Mouth Ulcers or Glossitis 2:19 Dizziness and Breathlessness 2:34 Disrupted Vision 2:54 Frequent Mood Changes Vitamin B12 deficiency, also known as…