Dietplus claims a method of dietary rebalancing validated by science. Several doctors have expressed their opinions on this weight loss program, but their views differ based on the criteria considered: duration of follow-up, quality of evidence, role of dietary supplements. Measuring the real value of these opinions requires distinguishing between what is based on published clinical data and what is part of commercial discourse.
Dietplus Study in the journal Nutrients: what the data really shows
Dietplus highlights a study published in the international scientific journal Nutrients, conducted between 2021 and 2023. The results report an average weight loss of 10 kg over twelve weeks, with an additional kilogram lost during a follow-up conducted twelve weeks later. The study also mentions a reduction in cardiovascular risk and a decrease in insulin resistance.
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These results seem encouraging. However, several healthcare professionals point out a methodological issue: this is a study conducted under the brand’s internal protocol. The Haute Autorité de Santé recommends evaluating weight loss programs based on independent clinical trials, which is not the case here. To delve deeper into doctors’ opinions on Dietplus, this distinction between internal validation and validation by health authorities remains a crucial reading criterion.
| Criterion | Dietplus Study (Nutrients) | Medical Recommendations (HAS) |
|---|---|---|
| Type of evidence | Study on internal protocol | Independent clinical trials required |
| Duration of follow-up | Maximum 24 weeks | Minimum 12 months follow-up recommended |
| Measured indicators | Weight, cardiovascular risk, insulin resistance | Weight, quality of life, absence of yo-yo effect |
| Independence | Funded/initiated by the brand | Public or third-party funding required |
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Long-term follow-up: the weak point identified by doctors
Most online content about Dietplus focuses on the results of the initial weeks. Doctors interviewed in recent popular articles point out a recurring lack: the absence of medium and long-term data.
A program that shows rapid weight loss at three or six months does not prove anything about stabilization beyond a year. Practitioners remind that the risk of yo-yo effect remains the main limitation of low-calorie diets, especially when the protocol partly relies on dietary supplements and brand-specific prepared meals.
On the other hand, the weekly coaching offered by Dietplus is an element that several doctors consider positive. Regular behavioral support helps to change eating habits over time. The issue raised concerns the qualification of the coaches: Dietplus coaches are not healthcare professionals. They are franchisees trained internally, not qualified dietitians or nutrition doctors.
Dietplus dietary supplements and EFSA regulation
Dietplus incorporates dietary supplements into its weight loss program. These products (based on proteins, plant extracts, or vitamins) accompany the different phases of the protocol. Several doctors remind of a legal framework that commercial pages do not address.
European regulation, through EFSA, strictly regulates the health claims allowed on dietary supplements. Specifically, promises such as “fat burner” or “lose X kilos in Y weeks” are not validated by EFSA. The interviewed doctors encourage checking whether the claims on Dietplus products comply with this regulatory framework.
Here are the points of caution raised by healthcare professionals regarding dietary supplements in this type of program:
- Supplements do not replace a balanced diet and do not compensate for a structural nutritional deficit related to an overly restrictive diet.
- Their specific effectiveness on weight loss is not independently demonstrated outside the overall Dietplus protocol.
- Possible interactions with ongoing medical treatments are not systematically evaluated by in-store coaches, due to lack of medical training.
Doctors’ opinions on Dietplus: a framework for evaluating a weight loss program
Doctors do not outright reject Dietplus. Their position is more nuanced than what the sharp online opinions suggest. Regular behavioral follow-up is deemed useful. The three-phase method (weight loss, transition, stabilization) follows a classic pattern of dietary rebalancing.
What raises questions is the combination of a scientific discourse based on a single internal study and a franchise business model. To evaluate a weight loss program according to medical criteria, several elements must be met:
- Results published in peer-reviewed journals, ideally reproduced by independent teams.
- Documented follow-up of at least twelve months, including the stabilization phase.
- Oversight by qualified healthcare professionals (dietitians, nutrition doctors) and not solely by internally trained coaches.
- Compliance with regulations on health claims for all products sold within the program.
The Dietplus program checks some of these boxes (publication in Nutrients, structured protocol in phases), but not those concerning the independence of evidence and the qualification of participants. These are precisely the two points that doctors identify as the most problematic for assessing the program’s real long-term effectiveness.
A weight loss program can produce visible results in the short term without guaranteeing a lasting health benefit. Rapid weight loss and sustainable weight loss do not meet the same medical evaluation criteria, and it is on this discrepancy that doctors’ opinions urge caution.