What is the safe daily limit of caffeine intake for most adults?

The safe daily limit of caffeine intake for most adults is considered to be around 400 mg per day. This amount has been supported by numerous health organizations, including the U.S. Food and Drug Administration (FDA) and the European Food Safety Authority (EFSA). Consuming caffeine within this limit is generally associated with both health benefits and a low risk of adverse effects for the majority of the adult population.

Caffeine can enhance alertness, improve mood, and even boost physical performance when consumed in moderation. It's important to note that individual tolerance to caffeine can vary, so some people may experience side effects at lower doses, while others may consume more without any issues. However, staying at or below the 400 mg threshold is a guideline that helps mitigate risks such as increased heart rate, anxiety, digestive issues, and insomnia.

Options providing lower caffeine limits do not encompass the broader evidence showing that up to 400 mg is safe for most adults, while those suggesting higher limits might exceed the thresholds established for optimal safety, leading to potential health concerns for certain individuals.