That extra is not intended for use beyond 28 days

Example: 180lb person (82kg) for injury recovery at 5 mcg/kg: 82kg 5mcg = 410mcg per day With 5mg vial + 2ml water = 2,500mcg/ml concentration Draw 0.16ml per injection 12 doses per vial HOW For injury recovery (sprains, tears, tendonitis): Dose: 400-600mcg per day Frequency: Split into 2 doses (morning and evening) Duration: 4-6 weeks minimum Injection site: Near injury OR systemic (abdomen) Results timeline: 2-3 weeks to notice improvement For gut health (IBS, leaky gut, ulcers): Dose: 200-400mcg per day Frequency: Once daily, preferably morning on empty stomach Duration: 6-12 weeks Injection site: Systemic (abdomen) Results timeline: 3-6 weeks For general wellness and prevention: Dose: 150-300mcg per day Frequency: Once daily Duration: Ongoing or 4-week cycles with 2-week breaks Injection site: Systemic (abdomen) Results timeline: Subtle, cumulative benefits Body weight-based dosing: 150 lbs (68kg): Low: 204mcg (3 mcg/kg) Medium: 340mcg (5 mcg/kg) High: 476mcg (7 mcg/kg) 180 lbs (82kg): Low: 246mcg (3 mcg/kg) Medium: 410mcg (5 mcg/kg) High: 574mcg (7 mcg/kg) 200 lbs (91kg): Low: 273mcg (3 mcg/kg) Medium: 455mcg (5 mcg/kg) High: 637mcg (7 mcg/kg) Start at the low end for your goal

Although our small cohort was underpowered to assess the impact of these quantitative atherosclerotic changes on clinical outcomes, these mechanisms may at least partially explain the treatment effects associated with GLP-1Ra in large-scale RCTs
No, you should never shake the vial vigorously
Statistical Analyses Descriptive analyses were conducted using number and percentage for categorical variables and mean, median, standard deviation (SD), interquartile range (25th and 75th percentiles), minimum, and maximum for continuous variables