DMAA (1,3-Dimethylamylamine)Banned Substance

• The FDA's core finding is definitional rather than toxicological. DMAA does not meet the statutory definition of a dietary ingredient, which makes any product containing it adulterated [1].
  
  Synthetically produced DMAA in particular does not qualify as a dietary ingredient under federal law [1][2]. ^[1]

• Enforcement started with paperwork. On April 24, 2012 the FDA sent warning letters to ten supplement manufacturers and distributors [2].
  
  The letters cited a failure to establish DMAA's safety, and a failure to register it as a New Dietary Ingredient [2].
  
  By that month the agency had 42 adverse event reports tied to DMAA — narrowed blood vessels, raised blood pressure, shortness of breath, heart attack, and at least one associated death [2]. ^[2]

• In April 2013 the FDA went public and declared DMAA-containing supplements illegal [1][5].
  
  Its stated reason: ingestion can elevate blood pressure and lead to cardiovascular problems ranging from shortness of breath and chest tightening to heart attack [1]. ^[1]

• A 2021 FDA toxicology memorandum reaffirmed there is no basis to consider 1,3-DMAA generally recognized as safe for use in food [3].
  
  That conclusion covers all salt forms of DMAA, not only the base compound [3]. ^[3]

• The courts agreed. The 11th Circuit affirmed in 2019 that DMAA is not a dietary ingredient and is not generally recognized as safe [1].
  
  The Supreme Court declined to review the case in 2020 [1]. ^[1]

• The FDA's mechanism statement is direct: DMAA narrows blood vessels and arteries [1].
  
  That can raise blood pressure and lead to cardiovascular problems from shortness of breath and chest tightening through to heart attack, arrhythmias, seizures and other neurological effects [1]. ^[1]

• By 2013, DMAA-containing supplements had been linked to at least 86 reported illnesses [9][20].
  
  At least 5 deaths were reported in association with them [20]. ^[20]

• Two US active-duty soldiers died of cardiac arrest after collapsing during physical exertion, with DMAA identified on toxicology [8].
  
  One case involved a core body temperature at or above 105°F and rhabdomyolysis with a creatine kinase of 161,000 U/L [8]. The normal range is roughly 100–200 U/L. ^[8]

• A 21-year-old man with no typical cardiac risk factors went into cardiac arrest while exercising, after taking a DMAA-containing pre-workout supplement [6].
  
  The specific product wasn't even on the FDA's list of known DMAA-containing products [6]. ^[6]

• A published case series documented three adults who suffered cerebral hemorrhage, including subarachnoid hemorrhage, after using DMAA-containing products [7][11]. ^[7]

• Self-reported symptoms among users run to tachycardia, dizziness, tremors, palpitations, chest pain, headache, and numbness or tingling [10]. ^[10]

• Less common reports include severe allergic reactions, and worsened psychotic-like symptoms such as hallucinations or mania [9].
  
  People with a pre-existing condition such as bipolar disorder may be at higher risk of that second group [9]. ^[9]

• Two further single-case findings: secondary open-angle glaucoma in a young man, and acute liver injury [4].
  
  The liver reports include a death associated with the product OxyElite Pro [4]. ^[4]

• Animal lethal-dose figures exist only for the intravenous route — an LD50 of 39 mg/kg in mice and 72.5 mg/kg in rats [4].
  
  Injected animal data does not convert into an oral human threshold, and no source offers one. ^[4]

• The causal picture is disputed, and that disagreement is worth seeing rather than smoothing over.
  
  A 2012 Department of Defense Safety Review Panel concluded the evidence did not conclusively establish that DMAA causes adverse medical events [4].
  
  It still found a consistent signal that DMAA affects cardiovascular function like other sympathomimetic stimulants, and recommended continued prohibition on military installations [4]. ^[4]

• A 2017 systematic review identified only 16 eligible human studies — 8 retrospective case reports and 8 low-powered experiments [14].
  
  It described the evidence base for DMAA's adverse effects as shallow, with cases often confounded by co-use of caffeine or other stimulants [14].
  
  That paper questioned whether prohibition policies were fully evidence-based. Government sources and the case-report literature read the same accumulated reports as sufficient grounds for the ban [1][14]. ^[14]

• 1944 — Eli Lilly introduces methylhexanamine as Forthane, an inhaled nasal decongestant [4].
  
  1983 — its New Drug Application is withdrawn [4]. ^[4]

• 2006 — chemist Patrick Arnold reintroduces it to the dietary supplement market under the trademarked name Geranamine [4]. ^[4]

• 2010 — the World Anti-Doping Agency adds methylhexanamine to its Prohibited List as a stimulant [4][13].
  
  The same year, the US military recalls all DMAA-containing products from military exchange stores worldwide [4]. ^[13]

• July 2011 — Health Canada rules methylhexanamine a drug rather than a permitted dietary substance, and bans its sale [4]. ^[4]

• April 24, 2012 — the FDA issues its first ten warning letters to DMAA supplement manufacturers and distributors [1][2]. ^[2]

• Mid-to-late 2012 — Australia schedules it as a prohibited substance, a Swedish National Food Agency warning leads to a partial sales ban, and Brazil's ANVISA adds it to its prohibited list [4].
  
  The UK's MHRA rules the DMAA product Jack3D an unlicensed medicine requiring removal, and New Zealand's Ministry of Health bans methylhexanamine sales [4]. ^[4]

• April 2013 — the FDA publicly warns consumers that DMAA-containing supplements are illegal and can be associated with heart attacks [1][5]. ^[1]

• 2013 — the FDA administratively detains OxyElite Pro and Jack3d, together estimated at over $8 million retail, after USPLabs initially refuses to comply voluntarily [1].
  
  USPLabs ultimately destroys the detained product and agrees to stop manufacturing with DMAA [1]. ^[1]

• November 2013 — the FDA seizes more than $2 million of DMAA-adulterated supplements from Hi-Tech Pharmaceuticals [1][5]. ^[1]

• April 2017 — a federal district court rules the seized Hi-Tech products adulterated, and orders them condemned and forfeited for destruction [1].
  
  The 11th Circuit affirms in 2019, the Supreme Court denies review in 2020, and the products are destroyed on November 12, 2020 [1]. ^[1]

• August 2021 — the FDA's most recent published toxicology review reaffirms no basis for GRAS status for 1,3-DMAA, all salt forms included [3]. ^[3]

No scientifically established toxic dose exists for DMAA, because controlled human safety data are thin. What follows is what sources documented, not a threshold to work from.

A pharmacological review summarised expected single-oral-dose effects: roughly 4–15 mg on the lungs and nasal mucosa, about 50–75 mg on the heart, and about 100 mg on blood pressure [4].

DMAA has a long half-life, so repeated doses within 24–36 hours risk a cumulative buildup of stronger effects [4].

Most commercial DMAA-containing supplements were estimated to carry around 25 mg per serving [10].

In a small controlled study of 7 people, a single 25 mg oral dose produced essentially no blood pressure change [10]. At 50 mg the mean rise was about 7 mmHg, and at 75 mg about 16 mmHg [10].

People in published severe case reports are estimated to have taken far more — roughly 15 to 30 times a normal serving [10].

That works out to 375 mg or above, frequently taken alongside alcohol or other stimulants [10].

A New Zealand case report documented a 21-year-old man who developed cerebral hemorrhage after ingesting 556 mg, two 278 mg capsules, together with caffeine and alcohol [4].

Reported blood concentrations run roughly 10–100 µg/L in recreational use, above 100 µg/L in intoxicated patients, and above 300 µg/L in acute overdose [4]. ^[4]

The best real-world data comes from Texas poison control centre records: 56 DMAA-related exposures across 2010–2011, 75% of them in 2011 alone [15].

80.4% involved the product OxyElite Pro [15].

Over half — 57.1% — were managed on-site rather than at a healthcare facility, and 80.4% were classified as expected to be not serious [15].

The most frequent clinical effects were tachycardia (28.6%), nausea (16.1%) and vomiting (12.5%) [15].

The most common interventions were dilution with fluids (41.1%), giving food (19.6%) and activated charcoal (14.3%) — conservative, largely at-home management [15].

Read that dataset carefully. Its own authors caution the reported effects may be attributable to other ingredients in the same products, such as caffeine, rather than to DMAA alone [15].

It is a triage snapshot rather than a controlled safety study, so the mild outcomes don't establish that DMAA itself is low-risk [15].

For a suspected overdose, WebMD's pharmacist-authored guidance is to get medical help right away — call 911, or a poison control centre on 800-222-1222 in the US [9].

The FDA advises anyone who believes a DMAA product harmed them to contact their health care practitioner [1]. It offers its Safety Reporting Portal, or the manufacturer named on the label, as channels to report the incident [1]. ^[15]