5-Hydroxytryptophan: Difference between revisions

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==Toxicity and harm potential==

Due to the conversion of 5-HTP into serotonin by the liver, with prolonged use, there may be a significant risk of heart valve disease from serotonin's effect on the heart, which is thought to be due to agonism of the 5-HT<sub>2B</sub> receptors present on it.<ref>https://www.ncbi.nlm.nih.gov/pubmed/15781732 | Long-term serotonin administration induces heart valve disease in rats.</ref><ref>https://www.ncbi.nlm.nih.gov/pubmed/12466135 | Serotonin mechanisms in heart valve disease II: the 5-HT2 receptor and its signaling pathway in aortic valve interstitial cells.</ref> However, this may be avoided if Epigallocatechin gallate (more well known as 'EGCG') is taken before the 5-HTP. This is said to protect the heart, and therefore reduce the risks of any heart damage.<ref>https://www.ncbi.nlm.nih.gov/pubmed/27374189 | EGCG, a green tea catechin, attenuates the progression of heart failure induced by the heart/muscle-specific deletion of MnSOD in mice.</ref><ref>https://www.ncbi.nlm.nih.gov/pubmed/17906191 | Effects of green tea and EGCG on cardiovascular and metabolic health.</ref>

Due to the conversion of 5-HTP into serotonin by the liver, with prolonged use, there may be a significant risk of heart valve disease from serotonin's effect on the heart, which is thought to be due to agonism of the 5-HT<sub>2B</sub> receptors present on it.<ref>https://www.ncbi.nlm.nih.gov/pubmed/15781732 | Long-term serotonin administration induces heart valve disease in rats.</ref><ref>https://www.ncbi.nlm.nih.gov/pubmed/12466135 | Serotonin mechanisms in heart valve disease II: the 5-HT2 receptor and its signaling pathway in aortic valve interstitial cells.</ref>

It has been suggested that 5-HTP may cause eosinophilia-myalgia syndrome (EMS), a serious condition which results in extreme muscle tenderness, myalgia, and blood abnormalities. However, there is evidence to show that EMS was likely caused by a contaminant in certain 5-HTP supplements instead of the substance itself.<ref>https://www.ncbi.nlm.nih.gov/pubmed/7699627 | An eosinophilia-myalgia syndrome related disorder associated with exposure to L-5-hydroxytryptophan.</ref>

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 ==Toxicity and harm potential==
-Due to the conversion of 5-HTP into serotonin by the liver, with prolonged use, there may be a significant risk of heart valve disease from serotonin's effect on the heart, which is thought to be due to agonism of the 5-HT<sub>2B</sub> receptors present on it.<ref>https://www.ncbi.nlm.nih.gov/pubmed/15781732 | Long-term serotonin administration induces heart valve disease in rats.</ref><ref>https://www.ncbi.nlm.nih.gov/pubmed/12466135 | Serotonin mechanisms in heart valve disease II: the 5-HT2 receptor and its signaling pathway in aortic valve interstitial cells.</ref> However, this may be avoided if Epigallocatechin gallate (more well known as 'EGCG') is taken before the 5-HTP. This is said to protect the heart, and therefore reduce the risks of any heart damage.<ref>https://www.ncbi.nlm.nih.gov/pubmed/27374189 | EGCG, a green tea catechin, attenuates the progression of heart failure induced by the heart/muscle-specific deletion of MnSOD in mice.</ref><ref>https://www.ncbi.nlm.nih.gov/pubmed/17906191 | Effects of green tea and EGCG on cardiovascular and metabolic health.</ref>
+Due to the conversion of 5-HTP into serotonin by the liver, with prolonged use, there may be a significant risk of heart valve disease from serotonin's effect on the heart, which is thought to be due to agonism of the 5-HT<sub>2B</sub> receptors present on it.<ref>https://www.ncbi.nlm.nih.gov/pubmed/15781732 | Long-term serotonin administration induces heart valve disease in rats.</ref><ref>https://www.ncbi.nlm.nih.gov/pubmed/12466135 | Serotonin mechanisms in heart valve disease II: the 5-HT2 receptor and its signaling pathway in aortic valve interstitial cells.</ref>
 It has been suggested that 5-HTP may cause eosinophilia-myalgia syndrome (EMS), a serious condition which results in extreme muscle tenderness, myalgia, and blood abnormalities. However, there is evidence to show that EMS was likely caused by a contaminant in certain 5-HTP supplements instead of the substance itself.<ref>https://www.ncbi.nlm.nih.gov/pubmed/7699627 | An eosinophilia-myalgia syndrome related disorder associated with exposure to L-5-hydroxytryptophan.</ref>