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Some people may also experience headache, fatigue, or injection-site reactions such as redness or tenderness

Riboflavin has also been linked with the potential prevention of early aging, the ability to reduce your risk of heart disease, headache prevention, and the metabolism of fats and carbohydrates

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A large proportion come from China, where imports of hormone and peptide compounds have increased dramatically: US customs data shows they hit $328m in the first three-quarters of 2025, up from $164m in the same period the previous year, the New York Times reported

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