Metabolic Renewal is a popular weight loss program targeted to women. It claims to be effective because it’s targeted to the “female metabolism”.
In this article we’ll review the science (or lack thereof) behind the Metabolic Renewal program and explain whether or not we recommend it to women trying to lose weight.
Questionable Health Claims
Metabolic Renewal’s site makes many questionable and uncited health claims. Their homepage claims that “exercising like a man can suppress a woman’s thyroid.” This claim contains a citation number, but no matching citation anywhere on the page. That’s probably because it’s complete nonsense and unscientific.
There are no medically-defined gender roles for exercise. Both men and women benefit from all forms of exercise, from anaerobic to aerobic to low-intensity exercise like walking.
Their homepage also claims that “for the past 100 years, nearly all of the exercise and nutrition research has been done on men.” This is blatantly false.
A cursory search of PubMed, the leading free medical database of research studies, provides 572,000 results for the search term “men”, and 1,526,000 for the search term “women”.
A search for “women + exercise” (which searches the database for published medical papers containing both terms) provides 58,000 results.
Metabolic Renewal’s site claims that “most women fall into one of 7 core Hormone Types”. This is unscientific and illogical. There is no medically-defined term “hormone type.” Modern medicine has a good understanding of hormones and this is a made-up term the company is using to market an email solution to their customers. We find this to be misleading and unethical.
Uncited Scientific Data
Metabolic Renewal’s site contains several “Findings” under a “Science” header which are entirely uncited. This means the company provides no links or reference to the data from which they’re sourcing these “findings” and graphs, leading us to believe they’re entirely made up.
The first “Finding” states that women burn 65% more fat than men. The details state that a 2002 study in The American Journal of Physiology, Endocrinology and Metabolism proves this, however we searched every article published that year and cannot find this study. Use this link if you’d like to search the journal’s database for that year yourself.
Medical citations require a reference to a specific publication. You can’t just state a health claim and then say “based on a publication in the Science journal between the years of 2004-2009.”
Because Metabolic Renewal does not cite any specific article for this claim, we consider it untrue.
Medical research has shown that women burn more fat during exercise than men, because women have higher body fat on average, but we cannot find any data backing the 65% claim.
Metabolic Renewal’s “Finding #3” doesn’t even bother to mention a scientific journal. They just state “scientists recruited a group of women…they were astonished at what happened to the women during the intelligent workouts.”
Saying that “scientists found” something, without any reference to the source material, is totally unscientific and amateur. We find it highly unethical to be making such bold health claims with uncited information.
Founder Is Naturopath Not Medical Doctor
The founder of Metabolic Renewal is a man by the name of Jade Teta. As he documents on the “About Dr. Teta” page on their site, he is a naturopathic doctor.
While naturopaths are allowed to refer to themselves as doctors, typically Medical Doctors (MD) bear this distinction, so we wanted to highlight this information for readers.
Naturopathic doctors are only required to complete around 6,000 hours of clinical training, while Medical Doctors complete around 21,000 hours according to this breakdown by the American Academy of Family Physicians (AAFP).
We’re not against naturopathic medicine necessarily; we’re against bad science which appears to be the case with this company.
Zero Clinical Proof of Efficacy
The more bold the health claims that a company makes, the higher the burden of proof on them to prove those claims.
Metabolic Renewal, of course, has zero proof of clinical efficacy. The company does not fund or publish any research proving their wild claims are accurate, or that their workout plan or meal plans are effective for weight loss.
We recommend that consumers be wary of companies making strong health and disease claims without published medical research supporting those claims.
We recommend that women seeking natural weight loss consider significantly increasing their dietary fiber intake daily, as this is one of the most well-studied methods of safely inducing weight loss.
One of the most comprehensive reviews of dietary interventions for weight loss proved that increasing dietary fiber intake caused weight loss. The review was published in the Journal of Nutrition, a well-respected medical journal, and the researchers found that both men and women experienced weight loss to the same degree (Dr. Teta would be shocked).
The weight change in the highest fiber intake quartile was 10 kilograms, equivalent to 22 pounds, after 6 months.
The reason fiber is so effective at causing weight loss is it increases satiation, or the sense of fullness. This allows patients on a diet to consume a caloric deficit while reducing cravings that present when simply cutting calories.