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However, we prefer subcutaneous administration over intramuscular injection, especially for frequent self-injection

The long-term benefits for athletes or individuals engaged in regular physical activity include improved performance and reduced muscle fatigue

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They slow gastric emptying, increase satiety, act on appetite signaling in the brain, and enhance glucose-dependent insulin secretion

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If blood tests show clearly low levels (thresholds vary by lab, but often below roughly 200 pg/mL) or there are signs of anemia, a provider may recommend weekly injections for the first several weeks as a correction or "rescue" phase