Level Protab CBG 22mg each. 228mg CBG per Box 22mg per Tablet Smooth out the edges of a rough day with the extra-strength, calming effects of our CBG Protab. Each swallowable tablet contains 25 mg of CBG and takes effect in 30–90 minutes, with a duration of 3–6 hours. Should you want to consume a lighter dose, they’re scored so you can easily split one in half.