I came across this negative review and would like to know everyone's thoughts!

The article is written by someone with no credentials in nutrition, it is poorly written, and many of its claims are unsourced. Claims that are cited are often use low-quality, non-academic, non-scientific sources (like fitnessfortravel.com). Many of its claims even go against the current scientific consensus. For example:

[A]lmost all soy variations are GMO based, which more or less makes them automatically bad for your body. ... GMO foods have been linked to allergies, liver problems, infertility and sterility, breast cancer, thyroid disorders, kidney stones and more.

The largest scientific organization in the world, however, points out that:

The EU, for example, has invested more than €300 million in research on the biosafety of GMOs. Its recent report states: “The main conclusion to be drawn from the efforts of more than 130 research projects, covering a period of more than 25 years of research and involving more than 500 independent research groups, is that biotechnology, and in particular GMOs, are not per se more risky than e.g. conventional plant breeding technologies.” The World Health Organization, the American Medical Association, the U.S. National Academy of Sciences, the British Royal Society, and every other respected organization that has examined the evidence has come to the same conclusion: consuming foods containing ingredients derived from GM crops is no riskier than consuming the same foods containing ingredients from crop plants modified by conventional plant improvement techniques.

The most famous anti-GMO study (which is what the author may or may not have been referring to -- this is unclear because his claim is not cited) has strongly criticized for its methodology and even retracted (i.e. unpublished!) because its resulted could have been caused by other factors.

The author on soy:

Regarding Soy lecithin it has been found to be extremely estrogenic. That means it functions like estrogen in the body and can cause hormonal imbalances.

This claim is dubious at best. A few seconds of research will show that:

Because of the phytoestrogen content, some studies have suggested that soybean ingestion may influence testosterone levels in men. However, a 2010 meta-analysis of 15 placebo controlled studies showed that neither soy foods nor isoflavone supplements alter measures of bioavailable testosterone or estrogen concentrations in men. (Source) It has been hypothesized that soy foods and enterolactone may increase the development of prostate cancer although no significant associations were observed for the soy isoflavones (Source). Furthermore, soy consumption has been shown to have no effect on the levels and quality of sperm (Source). A 2009 meta-analysis of the research on the association between soy consumption and prostate cancer risk in men concluded that "consumption of soy foods is associated with a reduction in prostate cancer risk in men" (Source).

I haven't read the whole thing, but so far the article appears weakly argued and poorly researched.

/r/soylent Thread