Hidden health symptoms: California-based doctor Cleo Tetzloff has highlighted on Instagram that many people may feel unwell despite having “normal” lab results. In her post, she outlines ten signs that the body may need deeper investigation, including fatigue, brain fog, hair loss, low mood, weight gain, poor sleep and gut issues. She suggests that standard reference ranges may not always reflect optimal health and encourages more comprehensive testing. However, she also advises seeking proper medical guidance rather than ignoring professional care.