Short answer

Most THC gummies sold in US dispensaries contain 2.5 mg to 10 mg of delta-9 THC per piece. Medical products in some states go to 50 mg per piece. A 10 mg piece is the standard adult serving where state law sets a limit. Three numbers decide the strength: mg per piece, mg per package, and your tolerance.

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What the package label tells you

State caps set the ceiling near you

California, Colorado, Nevada, and Washington cap single servings at 10 mg and packages at 100 mg for adult use. Oregon caps adult-use servings at 5 mg and packages at 50 mg. Medical programs in several states allow 50 mg pieces and 500 mg packages. A gummy bought in one state can be 10 times stronger than one bought a two-hour drive away.

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Dose, onset, and duration

Oral THC bioavailability runs about 4% to 20%. The liver converts delta-9 THC into 11-hydroxy-THC, which reaches the brain faster than the parent compound. Onset runs 30 to 90 minutes. Peak blood levels land 2 to 4 hours after eating. Effects last 4 to 8 hours, longer with a full stomach and a high dose. Inhaled THC peaks in minutes. Edibles do not.

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Why 10 mg hits people differently

Body weight, liver enzyme activity (CYP2C9 and CYP3A4), food in the stomach, and use history all shift the response. Daily users often need 20 mg to 50 mg for the effect a new user gets from 5 mg. A person with no history may feel strong effects from 2.5 mg.

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Label accuracy

A 2015 study in JAMA tested 75 edible products in three US cities. 17% matched the label. 23% contained more THC than the label stated, with some reaching more than double. 60% contained less. State testing rules have tightened since then, but errors still appear in unregulated and online products.

How to judge a gummy near you

  1. Ask for the batch test report (COA). Check total THC, not just delta-9.
  2. Read the package total. A 100 mg bag with 10 pieces is 10 mg per piece.
  3. Start with 2.5 mg to 5 mg if you have no history with edibles.
  4. Wait 2 hours before a second piece.
  5. Buy from a licensed dispensary in your state. Products from smoke shops and gas stations carry no potency guarantee.

Too much

Symptoms include fast heart rate, nausea, anxiety, paranoia, and unsteady balance. There are no recorded deaths from THC alone in adults. Effects fade over several hours. Water, rest, and a calm room help.