Side Effects of Amino Acids Supplements

Side effects of amino acids are the major concern of those people who take its supplements. People take amino acids supplement for muscle building, body building, growth, healthy immune system, depression, seizures, premenstrual syndrome etc. Sports man also use amino acids to improve their endurance, physical fitness and building muscle mass.

Like the benefits of amino acids supplements, side effects of amino acids supplements are also largely depend on the kind of amino acid which has been taken. Amino acids supplements found individually in forms of pills and capsule or in combination.

Some common side effects of amino acids supplements

  • Depression (Stress-related tension)
  • Muscle aches
  • Restlessness
  • Increase Heartbeat
  • Heart Palpitations

The side effects of mostly used amino acids are mentioned below, before their discussion I would like to mention; “amino acids are practically harmless until and unless they are taken in extra high doses”. So, one should use them in recommended quantity:

L arginine

Although the side effects of amino acids supplements are rare but still arginine can cause gas, diarrhea, bloating, nausea and chest pain.


Side effects of phenylalanine include insomnia, anxiety, heart burn and headache. If it is taken in pregnancy, it may cause mental disorder in developing fetus. 


Side effects of Tryptophan include Joint pain, high fever and shortness of breath etc.


Side effects of amino acids supplements (Taurine) may include depression and high doses.

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