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However, stratification of the data revealed a protective effect against osteoporotic fracture in participants older than 80 years (120)

Most people can inject effectively into the fatty layer under the skin with a 4 mm or 6 mm needle no need to reach the muscle

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9 The researchers also noted that sublingual B12 has many practical advantages over injections, which are painful, costly, and require repeated clinic visits

Nausea on dose increases each dose bump can trigger a brief nausea window