Scientific journal Nature on tongkat ali side effects

In an article published on the website of the world's foremost scientific journal, Nature, possible side effects of tongkat ali (Eurycoma longifolia) were listed as "a light headache, a slight fever or even a rash" for a few days. Referred-to results were "increased sexual desire, enhanced performance and general well-being".

As usually is the case with scientific articles, a payment is required to read the full article. However, an abstract can be read for free on the Nature website here:

http://www.nature.com/nm/journal/v11/n9/full/ nm0905-912a.html

References:

George A, Udani J, Abidin NZ, Yusof A. (2018). Efficacy and safety of Eurycoma longifolia (Physta®) water extract plus multivitamins on quality of life, mood and stress: a randomized placebo-controlled and parallel study. Food Nutrition Resources, Vol 62.

Henkel R.R.; Wang R.; Bassett S.H.; Chen T.; Liu N.; Zhu Y. et al. (2014), Tongkat Ali as a potential herbal supplement for physically active male and female seniors - A pilot study , Pharmacological Research, Volume 28, Pages 544-550, https://doi.org/10.1002/ptr.5017

Hien, Dao Thi Thanh; Long, Tran Phi; Thao, Tran Phuong; Lee, Jeong-Hyung; Trang, Duong Thu; Minh, Nguyen Thi Thu; Cuong, Pham Van; Lan, Dang, Nguyen Hai; Dat, Nguyen Tien (2019), Anti-inflammatory effects of alkaloid enriched extract from roots of Eurycoma longifolia Jack, Asian Pacific Journal of Tropical Biomedicine, Volume : 9 , Issue : 1 , Pages : 18-23

Nhan NH, Loc NH. (2017), Production of eurycomanone from cell suspension culture of Eurycoma longifolia , Pharmaceutical Biology Vol 55(1) Pages 2234-2239

Rehman SU, Choe K, Yoo HH. (2016), Review on a Traditional Herbal Medicine, Eurycoma longifolia Jack (Tongkat Ali): Its Traditional Uses, Chemistry, Evidence-Based Pharmacology and Toxicology , Molecules, Vol 21(3) Pages 331

Ruan, Jingya; Li, Zheng; Zhang, Ying; Chen, Yue; Liu, Mengyang; Han, Lifeng; Zhang, Yi; Wang, Tao (2019), Bioactive Constituents from the Roots of Eurycoma longifolia, Molecules, Volume 24(17), Pages 3157; https://doi.org/10.3390/molecules24173157

Tambi, Ismail (2021), Herbal medicine used to treat andrological problems: Asia and Indian subcontinent: Tongkat Ali (Eurycoma longifolia jack) , Herbal Medicine in Andrology An Evidence-Based Update, Pages 107-111

Udani J.K.; George A.A.; Musthapa M.; Pakdaman M.N.; Abas A. (2014), Effects of a proprietary freeze-dried water extract of Eurycoma longifolia (Physta) and Polygonum minus on sexual performance and well-being in men: a randomized, double-blind, placebo-controlled study, Evidence-Based Complementary and Alternative Medicine, https://doi.org/10.1155/2014/179529

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