Mace is a spice derived from the outer covering of the nutmeg seed that can produce psychoactive and toxic effects when consumed in large quantities. It is not a manufactured street drug but rather a natural substance found in kitchens worldwide, occasionally misused for its mind-altering properties. The active compound responsible for these effects is myristicin, which the body converts into substances that interact with brain chemistry in ways similar to certain stimulants and hallucinogens.
What Mace Actually Is
Mace comes from the reddish, lace-like coating (called the aril) that surrounds the nutmeg seed inside the fruit of the Myristica fragrans tree. In normal cooking quantities, mace is a harmless flavoring. The problem starts when people ingest it in much larger amounts, seeking a cheap, legal high. Both mace and nutmeg contain myristicin, elemicin, and safrole, compounds that become psychoactive at high doses. Myristicin is structurally similar to certain amphetamine-like substances, which is why large doses can trigger stimulant and hallucinogenic effects.
How It Affects the Brain and Body
When consumed in toxic amounts, mace produces a combination of anticholinergic and serotonergic effects. Anticholinergic means it blocks a key chemical messenger in the nervous system, leading to a cluster of recognizable symptoms: rapid heart rate, dry mouth, dilated pupils, flushed skin, confusion, and difficulty urinating. The serotonergic effects involve disruption of serotonin signaling, which can alter mood, perception, and consciousness.
This dual action on the nervous system is what makes mace intoxication unpredictable and potentially dangerous. Unlike drugs designed to produce a controlled effect, mace delivers a messy cocktail of neurological disruption that varies widely from person to person depending on the amount consumed and individual sensitivity.
Short-Term Effects of Mace Intoxication
The onset of effects is slow, typically taking two to six hours after ingestion, which sometimes leads people to take more because they assume the first dose “didn’t work.” This delayed onset is a major reason overdoses happen. Once effects begin, they can include:
- Elevated heart rate, sometimes exceeding 120 beats per minute
- Anxiety and agitation
- Hallucinations, both visual and auditory
- Confusion and disorientation
- Nausea, vomiting, and abdominal pain
- Drowsiness progressing to deep sedation in severe cases
The effects can last an unusually long time. Many people report feeling “off” for 24 to 48 hours, with some residual grogginess and confusion lingering even longer. This is not a short, controllable high. Most people who try it recreationally describe the experience as deeply unpleasant.
Serious Risks and Toxicity
At high doses, mace can cause far more than an uncomfortable experience. Central nervous system toxicity can produce seizures and altered levels of consciousness ranging from delirium to coma. A case published in the journal Cureus documented a six-year-old child who fell into a reversible coma after accidentally eating six pieces of mace. The child presented with a heart rate of 127 beats per minute, impaired consciousness, and respiratory acidosis, a dangerous buildup of carbon dioxide in the blood that indicated her breathing was suppressed. She required intensive monitoring before recovering.
While fatal outcomes from mace or nutmeg alone are rare, they have been reported. The greatest dangers come from respiratory depression, aspiration (inhaling vomit while sedated), and cardiovascular stress. People with underlying heart conditions face higher risk. Combining mace with alcohol or other sedating substances significantly increases the chance of a life-threatening reaction.
Liver and kidney function typically remain normal in mace poisoning cases, which means the toxicity is primarily neurological rather than organ-damaging. However, the neurological effects alone can be severe enough to require emergency care.
Why People Try It
Mace and nutmeg intoxication tends to appeal to people who lack access to other substances, particularly teenagers and incarcerated individuals. It is legal, cheap, and available in any grocery store. Online forums sometimes describe it as a “natural high,” but the overwhelming consensus from people who have actually tried it is that the experience is miserable: hours of nausea, paranoia, and disorientation followed by a prolonged hangover-like state. The ratio of unpleasant side effects to any desirable sensation is extremely unfavorable compared to almost any other psychoactive substance.
Potential for Long-Term Harm
Because most people who try mace recreationally do not repeat the experience, research on chronic use is limited. However, the compounds in mace affect serotonin pathways in the brain, and repeated disruption of serotonin signaling is associated with lasting changes in mood regulation, memory, and cognitive function. Animal studies on substances that damage serotonin nerve terminals show subtle but persistent deficits in learning and memory that correlate with the degree of damage to serotonin systems in the hippocampus, the brain’s memory center.
Repeated exposure to substances with anticholinergic properties has also been linked to increased risk of cognitive decline over time. While occasional exposure to mace in cooking poses no such risk, deliberately consuming psychoactive doses on a regular basis could plausibly contribute to these problems.
Legal Status
Mace is not a controlled substance. It is not listed on any DEA schedule, and there are no laws against purchasing or possessing it. This legal availability is part of what makes it attractive to some people seeking intoxication, but it also means there is no regulatory framework providing dosing guidance or purity standards for recreational use. Being legal does not make it safe. The margin between a dose that produces mild effects and one that causes a medical emergency is narrow and highly variable between individuals.