Comparing Substance Risk Categories for a Developing Brain

Hover a bar for the reason behind its rating. Click a substance name at the left to focus on it; click again to show all.

Two kinds of risk are shown for each substance. Developmental Brain Risk (blue) is how much a substance can harm a brain that is still growing. Unpredictability / Contamination Risk (orange) is how uncertain it is what a substance actually contains. Hover a bar or click a substance name to learn more.

Educational, qualitative scale (Low / Moderate / High / Severe). Illustrative comparison based on public-health and brain-science literature, not exact clinical statistics.