[3] She is a New York Times best-selling author,[4] and companies such as Chick-fil-A and Kraft[5][6][7] may have changed or reconsidered ingredients in their products following her campaigns.

"[19][20] Hari has capitalised on her following by selling books, subscriptions to her eating guide,[12] meal plans, products through which she gains affiliate commissions,[21][22][2] and through marketing her own line of supplements under the Truvani brand.

[8] Hari has said that President Barack Obama did not keep a promise that he made during his 2008 presidential campaign to force the labeling of genetically modified food (GMOs).

[6] Following Hari's visit, Kraft told ABC News Chicago they have "no plans to change the recipe for the original mac and cheese,"[30] and "...the safety and quality of our products is our highest priority and we take consumer concerns very seriously.

[5][32] In 2013, Hari wrote about the use of class IV caramel color in Newcastle Brown Ale on her blog and put public pressure on them to drop this ingredient.

[33] Heineken's announcement came just prior to the release of her book, The Food Babe Way (February 10, 2015), that devotes a chapter to the ingredients—including caramel coloring—in some beers, wines, and liquors.

[33] In February 2014, Hari launched a petition on her website asking Subway to remove azodicarbonamide (an FDA-approved flour bleaching agent and dough conditioner)[34] from their sandwich bread.

[39] Food science experts have pointed out that the level of azodicarbonamide permitted by the FDA for use in bread is too low to pose a significant risk.

NPR cited this as an example of fearmongering and lack of subject matter knowledge, as isinglass, derived from fish swim bladders, has been used as a natural fining agent in food and drink for centuries, and is in any case used primarily in cask ale, not vat-brewed beers, which are normally cleared by filtering.

[45] The trade publication Beer Marketer's Insights called Hari's petition an "attempt of fear-mongering in the name of advocacy.

[46] In August 2014, Hari wrote a blog post in which she claimed there is a lack of transparency when it comes to the ingredients in Starbucks' drinks.

[47] On February 5, 2015, Hari launched a petition on her website asking General Mills and Kellogg's to remove the preservative butylated hydroxytoluene (BHT) from their cereals.

BHT has to be listed as an ingredient on food labels, and some consumer-protection advocates like the Environmental Working Group have advised people to avoid it when possible.

[50] On February 5, 2015, General Mills released a statement that they would be removing BHT from their cereal, stating, "This change is not for safety reasons, but because we think consumers will embrace it.

We've never spoken with Vani Hari and she did not play any role in our decision," and "...our removal of BHT from cereals is well underway and has been for more than a year.

"[52] In August 2015, Hari campaigned Subway in conjunction with Natural Resources Defense Council, Friends of the Earth, the Center for Food Safety, and the U.S. Public Interest Research Group to commit to buying meat produced without the routine use of antibiotics and to provide a timeline for doing so.

[59][60] Hari released her second book, Feeding You Lies: How to Unravel the Food Industry's Playbook and Reclaim Your Health, in February 2019.

"[16][44] According to horticultural scientist Kevin Folta, Hari's lack of training often leads her to misinterpret peer-reviewed research and technical details about food chemistry, nutrition, and health.

"[16] Cheryl Wischhover, a freelance Beauty/Health/Fitness writer in Elle described Hari's tactics as "manipulative", "sneaky", and "polarizing rather than productive."

Wischhover also wrote about cases of Hari deleting and failing to acknowledge past articles, and stated "The fact that she tried to 'disappear' these stories makes me distrust and discredit anything else she has to say, and it's mindboggling that others still take her seriously.

[67][68] Following d'Entremont's article, Marion Nestle stated that d'Entremont's criticisms were "valid scientifically", and that "the difficulty with the kinds of compounds that Vani Hari has been dealing with is that they're present in the food supply in very small amounts, and therefore it's very hard to test whether small amounts are harmful or not harmful, so the science is uncertain, it's nuanced, it's very hard to talk about."

"[66] Hari has also been accused of banning dissenters from the Food Babe LLC social media accounts in order to create an echo chamber.

[75] Steven Novella calls Emoto's claims "pure pseudoscience" and states that "Hari's conclusions about microwaves[76] are all demonstrably incorrect and at odds with the scientific evidence".

[83] In an article in Bloomberg Businessweek, Duane D. Stanford wrote that Hari has an apparent financial interest by generating controversy in order to draw traffic to her website to increase ad sales and drive readers to buy a subscription to her organic Eating Guide, which Hari says is her primary source of revenue.