Everyone is unique and as such the answer is that it depends on you. Optimal dosages and strengths vary from person to person based on a number of factors including body weight, height and tolerance.
If you're new to CBD then we always recommend that you start with a lower strength product and build up using our helpful information on recommended dosage build ups.
If after building up you're not feeling the desired benefit then you should move up to the next strength product.
It is important to remember that when you first start taking CBD it is about finding the right balance and enabling your body to get used to taking CBD, therefore it may take a little time to find the right strength and dosage for you.