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Liquids and gummies often contain added ingredients, such as sweeteners and flavorings, that can break down more quickly
For intramuscular injection, stretch the skin taut and insert the needle at 90 degrees into the muscle
Most B12 injections deliver a high dose typically 1,000 mcg of cyanocobalamin or hydroxocobalamin directly into muscle tissue
For current pricing on compounded retatrutide, see our [cost guide](/guides/retatrutide-cost-price-guide-2026)
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