Caution against long-term use, among other things:
Side Effects & Safety
Eurycoma longifolia [aka TONGKAT ALI] is POSSIBLY SAFE when taken by mouth in medicinal amounts for up to 9 months. Eurycoma longifolia is POSSIBLY UNSAFE when used orally in large amounts. Some Eurycoma longifolia supplements from Malaysia have been found to contain mercury or lead. A drug used to treat erectile dysfunction known as sildenafil (Viagra) has also been found in some Eurycoma longifolia supplements. Taking too much Eurycoma longifolia might cause mercury or lead poisoning or other side effects.”
“There are concerns about the quality and safety of products containing Eurycoma longifolia due to potential contamination with heavy metals. One study shows that 17% of Eurycoma longifolia products in Malaysia contain high levels of lead (17925). Another study shows that 36% of these products contain high levels of mercury.”
Quality control concerns as late as 2017:
https://scialert.net/fulltextmobile/?doi=jas.2017.324.338
Note: There is no official analysis by FDA or anyone else of this product to confirm content.
https://www.webmd.com/vitamins/ai/ingredientmono-1132/eurycoma-longifolia
If you are being treated for blood pressure or diabetes and/or taking other herbal/pharmacological compounds, careful:
“These results support the suggestion by the World Health Organization that a combination of ingredients should be considered as ‘herbal medicine of uncertain safety’ and also regards this product as a new substance where safety data are then required.”
https://innovareacademics.in/journal/ajpcr/Vol4Issue3/243.pdf
“E. longifolia extract is commonly consumed as a herbal medicine or dietary supplement for its various pharmacological effects. Therefore, it is likely to be coadministered with prescription or conventional drugs, particularly in patients with chronic diseases such as diabetes mellitus, hypertension, and other cardiovascular diseases. Considering the present results and those previously reported in the literature, coadministration of E. longifolia products and conventional drugs requires careful attention”
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4512589/
I’ve looked into this stuff. Personally, I refuse to poison myself intentionally. Getting all the crap in food is bad enough. I got my health back, but not my youth.
There’s a lesson in there for all males.
Tongkat Ali does not normally contain lead or mercury, it comes down to quality of source and where it’s grown. Be suspicious of China or other third world countries with poor sanitation and little if any control over industrial pollution. That’s where the lead and mercury are coming from.