What is Nature's Truth Vitamin B12 + Folic Acid? Vitamin B12 is a crucial water-soluble nutrient that plays a vital role in maintaining good health. However, B12 deficiency is relatively common, as many individuals fail to consume adequate amounts from their diet or struggle to absorb sufficient quantities from the foods they eat. While B12 is naturally present in animal-based products such as meat and dairy, those following a vegan or plant-based diet are particularly susceptible to low B12 status. Prolonged deficiency can lead to severe and potentially dangerous symptoms. Taking a B12 supplement provides a reliable way to ensure you receive a sufficient supply of this essential vitamin.