![]() Lumen makes bold claims about the general health benefits of metabolic flexibility, but doesn’t explain at all how their device helps achieve that. Why does it matter whether a person is burning fat or carbs for fuel if they’re healthy? The entire premise behind the company is confusing to us. Lumen did publish a medical trial proving that their device can accurately measure whether carbs or fats are being used as a source of fuel, but there doesn’t appear to be any evidence that this information can help optimize metabolic flexibility beyond the basic recommendations we’ve already covered. Lumen makes many health claims on their website that we find to be extremely questionable. It’s important to note that neither medical review we examined mentioned carbon dioxide levels at all. ![]() Lumen claims to measure carbon dioxide levels in the breath to determine a “flex score” that shows consumers how flexible their metabolism is. Lifestyle interventions are effective for countering metabolic inflexibility, according to the scientists.Įxercise (both aerobic and anaerobic), losing weight for obese patients, interruption of sedentary behavior like short walks during work, and supplementation of certain amino acids like l-carnitine are all suggested to improve metabolic flexibility based on research.īasically, the standard healthy lifestyle recommendations most people are used to hearing seem to be the biggest factors in enhancing metabolic flexibility. ![]() The second review is more interesting than the first, because it also outlines research-backed ways to improve metabolic flexibility. Gastrointestinal peptide release, natural hormone production and mitochondrial function were all listed as factors which can determine metabolic flexibility. A healthy person has no issue switching between fat or carbs as a source of energy, but an unhealthy person may struggle with either or both.Ī more recent medical review explored the topic of metabolic flexibility in more detail, explaining many factors that influence it. Insulin resistance occurs when the body’s metabolism of carbohydrates breaks down and becomes less efficient due to beta cell dysfunction. The study authors described how metabolic inflexibility may contribute to poor health. A medical review published in the Cell Metabolism journal in 2017 analyzed metabolic flexibility in health and disease. Metabolic flexibility is a real term used in the medical community. Lumen’s value proposition centers on a concept called metabolic flexibility, which refers to the body’s ability to shift between burning fat or carbs as a primary energy source. In this article we’ll review some of the health claims made by Lumen in light of published medical research (or lack thereof), discuss whether metabolic flexibility is even real, and conclude with whether or not we recommend this device. Lumen is a tech company with a bold claim: that they’ve manufactured a device that can help you “hack your metabolism” to increase fat loss, lose weight, and boost energy naturally.
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