Biotin Can Affect Your Blood Test Results: What Doctors Want You to Know

Biotin Supplements: Important Note Before Blood Tests Madrid, Spain – May 23, 2025 – A recent video by Spanish health influencer Isabel Vina highlights the importance of temporarily suspending biotin supplements before certain blood tests. Vina, a medical doctor, explains that biotin can significantly interfere with the accuracy of tests measuring vitamin D, vitamin B12, and various hormones. "If you're taking biotin for your hair, skin, or nails, watch this video," Vina states in her video. She emphasizes that this interference can lead to inaccurate results, potentially causing unnecessary concern or misdiagnosis. Vina recommends discontinuing biotin intake for 3-7 days before undergoing these types of blood tests. The video's clear explanation of this issue has resonated with viewers, gaining significant traction online. This underscores the need for greater awareness among both healthcare providers and individuals about the potential impact of biotin on laboratory results. The timely advice provided by Dr. Vina serves as a valuable reminder of the importance of open communication between patients and their doctors regarding all supplements and medications.