No, the popular blogger's post recommending readers to eat only once a day is not a credible source because it goes against the well-known and widely accepted advice of health professionals, nutritionists, and scientific research. It is important to gather information from reliable sources, such as qualified experts in the field, who have conducted and published rigorous research and studies on maintaining a healthy lifestyle. Following such advice without consulting credible sources can be risky and may have negative effects on a person's health.

Additionally, a popular blogger may have personal biases, financial incentives, or lack the appropriate qualifications and expertise to give reliable health advice. It is always best to consult reliable, evidence-based sources that have been peer-reviewed and follow established scientific methods. Trusted sources include reputable health websites, medical professionals, registered dietitians, and scientific journals. Making health-related decisions based on credible information can help individuals make informed choices that promote their well-being and minimize potential risks.