If a doping violation occurs, whether or not it was intentional will have a significant impact on the decision regarding sanctions. The length of the suspension will differ greatly depending on whether or not it is determined to be intentional.

However, no matter how much you claim it was unintentional, if you cannot prove it, it will be judged as intentional.
To prove it was unintentional, you need to prove how the prohibited substance entered your body, and if you cannot do that, you cannot prove it was unintentional.
Keeping records of your daily life, including medications, other supplements, and food, can help prove how the prohibited substance entered your body and can be presented as evidence that it was unintentional.