B12 capsules contain vitamin B12, a crucial nutrient for various bodily functions. Vitamin B12 plays a key role in red blood cell formation, nerve function, and DNA synthesis. Some potential benefits of B12 capsules include increased energy levels, improved mood, and support for cognitive function. B12 is essential for maintaining a healthy nervous system and may aid in preventing or alleviating symptoms of B12 deficiency, such as fatigue, weakness, and tingling sensations. While B12 is naturally found in animal products, supplements can be beneficial for individuals with dietary restrictions or absorption issues.