"Cutting', or diluting the drug with a cheaper substance, is also a danger with heroin and some other drugs. Drug dealers cut drugs like heroin and cocaine with substances such as sugar and unscented baby powder in order to make more money. Cutting can be deadly for a number of reasons. For example, baby powder is often made out of talc, a mineral used to make certain types of chalk. Talc does not dissolve in the blood like heroin does. Instead, it stays whole, forming hard deposits in the organs it reaches. Deposits in the heart, brain, and other organs can lead to deadly problems including strokes. Cutting also causes differences in the potency of different batches of the drug. This makes it harder to know how much heroin you're putting into your body, which makes fatal overdose much more likely."
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