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Agmatine Side Effects

Is Agmatine Safe to Use?

Agmatine is quickly replacing arginine as the go-to nitric oxide ingredient. Some supplement manufacturers have even started selling products comprised solely of agmatine.

In the excitement to learn all about agmatine’s muscle building benefits, however, the side effects conversation is usually tabled and never revisited.

Direct Agmatine Side Effects

In a clinical study, agmatine was given to subjects in escalating dosages starting at 1.335 g/day for 10 days and culminating with 3.560 g/day for 21 days.

Aside from three participants in the highest dose cohort experiencing mild-to-moderate diarrhea and mild nausea during treatment, no other events were observed.[1]

According to this study, there doesn’t appear to be any other side effects from taking agmatine apart from gastrointestinal issues.

Indirect Agmatine Side Effects

Additional agmatine side effects can be considered a consequence from boosting nitric oxide levels. When using agmatine or any other vasodilator it’s important to be aware of these side effects:

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  • Reduced dopamine levels: Dopamine is a chemical messenger which plays an important role in mood, cognitive ability, and sleep. Nitric oxide, and therefore agmatine, has an inhibitory effect on dopamine transporters, and significantly reduces uptake.[2]
  • Blood pressure changes: Nitric oxide widens blood vessels and reduces blood pressure. While this may be desirable, if you have hypotension or experience a dramatic decrease in blood pressure this can cause dizziness, fainting, and might be life threating in some cases.[3]
  • Blood sugar changes: Changes in blood sugar from agmatine supplements is mainly a concern for diabetics, who must carefully monitor glucose levels.[4]

Alleged Agmatine Side Effects

In addition to gastrointestinal issues, some users on the Bodybuiding.com forum have commented they experienced headaches when taking agmatine.[5] Keep in mind this is an anecdotal side effect and not based on research.

Should You Still Use Agmatine?

Agmatine is relatively safe and effective. Even the gastrointestinal issues were only experienced by a few subjects taking an extremely large dose. Always check with a doctor if you are concerned with any issues arising from increased nitric oxide levels.

    References

    • [1] Keynan O, Mirovsky Y, Dekel S, Gilad VH, Gilad GM Safety and Efficacy of Dietary Agmatine Sulfate in Lumbar Disc-associated Radiculopathy. An Open-label, Dose-escalating Study Followed by a Randomized, Double-blind, Placebo-controlled Trial Pain Med. 2010 Mar;11(3):356-68. doi: 10.1111/j.1526-4637.2010.00808.x
    • [2] Kiss JP, Zsilla G, Vizi ES. Inhibitory effect of nitric oxide on dopamine transporters: interneuronal communication without receptors. eurochem Int. 2004 Sep;45(4):485-9.
    • [3] “Low Blood Pressure (hypotension).” Mayo Clinic.
    • [4] Kingwell at al. “Nitric Oxide Synthase Inhibition Reduces Glucose Uptake During Exercise in Individuals With Type 2 Diabetes More Than in Control Subjects.” Diabetes. August 2002 vol. 51 no. 8 2572-2580
    • [5] “Hemavol = headache! – Bodybuilding.com Forums.” Bodybuilding.com Forums – Bodybuilding And Fitness Board. Bodybuilding.com.
    Leave a Comment

    Comments (3)

    Chet

    March 3, 2014

    Agmatine Side Effects

    I have used agmatine supplements for over 5 months with no side effects what so ever. I did have high blood pressure that I treated with meds. But during the months I have been taking agmatine my pressure has come down to the normal range 120-122, it use to run 136-146. My muscle recovery has been faster and my gains steady progressing.

    Reply

    MAJOR WILLIAMS

    July 27, 2014

    AGMATINE USER

    I HAVE USE THIS PRODUCT FOR 6 MONTHS NOW WHILE WHEIGHT LIFTING IT HAS HELP MY WORKOUT EXTREMELY WELL WITH MY MUSCLE RECOVERY! I STRONGLY RECOMMEND IT! ESPECIALLY IF YOU WORK OUT!

    Reply

    Belinda

    October 15, 2015

    Definitely massive headache

    I take to reduce adrenaline works well take 4g awesome results so far, huge headache though

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