Consider a good diet to detoxify yourself. The Muslims regular and voluntary fasting is good also when it comes to detoxifying the body. Organic heavy metals from plants, fruits, herbs are not poisonous. Planting herbs, sunflowers etc. Cadmium can make a person sick at once.
Death can follow within hours.
However most damage can be hard to detect. Different persons react differently. It can take many years if the person does not do anything about it, but even extremely small amounts are dangerous for children especially. It is often difficult to pinpoint exact reasons for symptoms whenever they occur. But a urine test of cadmium levels can be a good indication.