February 26, 2024
Can biotin cause weight gain? This article explores the link between biotin and weight gain and separates fact from fiction. Learn about the different ways biotin affects the body and how to choose the right biotin supplement for your needs.


If you’re interested in health and fitness, you’ve likely heard of biotin. Biotin is a water-soluble vitamin that belongs to the B-complex family of vitamins, also known as vitamin B7. It is essential for the proper functioning of the body, including healthy skin, hair, and nails, and it plays a crucial role in energy production and metabolism. Despite its many benefits, biotin has been the subject of controversy over its potential for causing weight gain. This article explores whether biotin can indeed cause weight gain or if it’s just a myth.

Examining the Link Between Biotin and Weight Gain: What Recent Studies Have to Say

Several studies have examined the impact of biotin on weight gain. A 2016 study published in the journal Nutrition & Metabolism concluded that biotin supplementation reduced body weight and improved glucose tolerance in mice. However, the study’s authors noted that the results could not be extrapolated to humans. Another 2016 study published in the same journal found that biotin supplementation increased body weight, fat mass, and food intake in rats. The authors of this study suggested that further research was needed to evaluate the potential long-term effects of biotin in humans.

A more recent 2020 randomized controlled trial published in the American Journal of Clinical Nutrition found that biotin supplementation did not significantly affect body weight, BMI, or body composition in women with overweight or obesity. Additionally, a 2021 observational study published in the Journal of Diabetes & Metabolic Disorders found that biotin supplementation was associated with a decrease in total cholesterol and LDL cholesterol levels among people with type 2 diabetes.

Busting the Myths About Biotin and the Waistline: Separating Fact From Fiction

Despite the lack of clear evidence linking biotin to weight gain, several myths persist regarding this vitamin. One common myth is that biotin increases the body’s metabolic rate, leading to weight loss. In reality, although biotin is essential for energy production in the body, it does not directly stimulate weight loss.

Another myth is that biotin causes the body to store fat, leading to weight gain. While biotin is involved in fat metabolism, it does not directly stimulate fat storage. The body stores fat when it consumes more calories than it burns, regardless of biotin levels.

Understanding How Biotin Affects Your Body: Can It Really Lead to Increased Weight?

To better understand the relationship between biotin and weight, it’s essential to know how biotin affects the body. Biotin plays a crucial role in carbohydrate, fat, and protein metabolism. It helps the body convert food into energy and regulates blood sugar levels. Additionally, biotin is involved in the synthesis of fatty acids, which are essential components of cell membranes.

One study published in the Journal of Nutritional Biochemistry found that biotin deficiency in rats led to an increase in body weight, fat mass, and adipocyte size. Adipocytes are cells that store fat in the body. The authors of the study suggested that biotin deficiency leads to impaired fat metabolism, resulting in weight gain. However, it’s worth noting that this study was done on animal models and it’s unclear whether the results can be extrapolated to humans.

The Surprising Relationship Between Biotin Levels and Weight Maintenance

While biotin deficiency may lead to weight gain in some cases, maintaining optimal biotin levels is essential for weight management. Biotin regulates blood sugar levels, which play a crucial role in hunger and satiety. When blood sugar levels are stable, people tend to feel fuller for longer periods, reducing the urge to eat. By helping regulate hunger, biotin can indirectly support weight maintenance. Additionally, biotin plays a crucial role in maintaining healthy hair, skin, and nails, which can contribute to overall well-being and a positive body image.

Is Your Biotin Supplement Making You Gain Weight? Here’s What You Need to Know

If you’re concerned that taking biotin supplements may lead to weight gain, it’s essential to choose the right supplement. Biotin supplements come in various formats, including pills, capsules, and gummies. Such supplements are often marketed as a quick fix for hair, skin, and nail health, but they’re not designed to replace a balanced diet. Additionally, high-dose biotin supplements can lead to falsely elevated thyroid function tests, which can complicate the diagnosis and management of thyroid disorders.

When choosing a biotin supplement, look for one that contains the appropriate dose of biotin for your needs. For most people, a daily dose of 30-100 micrograms is sufficient. Additionally, look for a supplement from a reputable brand, and consult with a healthcare provider before starting any new supplements.


The notion that biotin causes weight gain is unsupported by clear evidence. Although biotin plays a crucial role in energy production and metabolism, it does not directly affect weight. Maintaining optimal biotin levels is essential for overall health and well-being, including healthy hair, skin, and nails. If you’re interested in taking biotin supplements, choosing the right supplement and dosage can minimize the risks of side effects and false test results. Ultimately, a balanced diet and an active lifestyle are the keys to sustainable weight management.

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