With factor VIII treatment, there’s no one-size-fits-all approach to dosing. Because your factor VIII activity levels can be measured and tracked in the blood, your factor VIII treatment can be individualized to help lower your risk for having a bleed—something that’s especially important during physical activity and if you have an active lifestyle. Your healthcare provider can use something called a pharmacokinetic profile, or PK profile, to determine the right dosage for your body.