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Size:1000 mcg/ml - 10 ml (Pack of 4) https://image.made-in-china.com/202f0j00lcdMoPSGLUqZ/Veterinary-Use-Complex-Vitamin-B-Injection-for-Poultry-Animals-Cattle-Sheep-and-Horses.webp Given 40-60% nasal bioavailability compared to 80-95% for injection, equivalent nasal doses would be approximately 400-1000mcg to achieve similar systemic levels apntly-service B12 & MIC B12 Injections in Columbia What to Know Before You Book

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