This question comes up a lot! Many people have questions or misconceptions surrounding Hemp derived CBD products. Because of its close relation to marijuana, it sometimes carries the stigma of being a "drug". So, it's easy to see why a lot of people are concerned about the amount of CBD they should take and how it might affect them, especially when they're trying it for the first time.
CBD will not impair your mental state regardless of how much you take (although we suggest you take that with a grain of salt - we don't recommend you chug a whole tincture bottle). Even so, there are many medical studies¹ that support the claim that CBD is non-toxic, and no fatal overdoses have been known to occur. That being said, it is a supplement, and you should always seek medical consultation before use.
The truth is, CBD affects everybody differently. The best way to find out how much you should take and how it will affect you is to start with a small dose and see how your body reacts. Remember that consistency is key, if you start with a small dose twice a day and aren't feeling much, up your dosage and measure the effects accordingly.