NCT07729683 Evaluation of the Effect of a Daily Dose of Wakame Seaweed on Reducing Circulating Concentrations of Advanced Glycation End Products in Patients With Stage III Chronic Kidney Disease

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This trial targets 30 participants in total. It began in 2026-01-27 with a primary completion date of 2027-10.

Brief Summary

Persistent glomerular hyperfiltration is a characteristic feature of the early stages of kidney disease and represents a factor in the progression of chronic kidney disease (CKD). In this context, the benefit of low-protein diets (less than 0.8g/kg/day) has been demonstrated in slowing the progression of CKD, although the underlying pathophysiological mechanisms remain unclear. Some studies suggest that the effects of protein on renal hemodynamics are primarily linked to the quality of the protein, particularly the amount of AGEs (Advanced Glycation End Products) consumed. Recently, edible seaweeds have gained popularity in Western countries due to their anti-inflammatory, anti-diabetic, and antihypertensive properties. These seaweeds are also associated with the above-average longevity of certain Asian populations who consume them daily. Wakame seaweed (Undaria pinnatifida), which is locally harvested along the French Atlantic coast, has shown promising biological properties, notably antihypertensive and anti-diabetic effects. It has also been recently demonstrated that fucoxanthin, a compound found in high concentrations in wakame, possesses strong anti-AGE activity. Dietary modifications are essential for nephroprotection, but they are often difficult to implement. This highlights the need to develop approaches that are both acceptable on a daily basis and sustainable in the long term for patients. A Michelin-starred chef, known for regularly incorporating seaweed into his cuisine, is a sponsor of the project and has validated a set of adapted recipes that will be offered to participants to accompany the daily wakame supplementation. The investigator's hypothesis is that a daily dose (5 grams of French wakame, dehydrated at low temperature and in flake form), equivalent to the average daily intake in Japan, could reduce circulating AGE levels in patients with stage III CKD. This would provide an additional protective effect when combined with the standard low-protein diet, helping to slow the progression of CKD over the long term.

Eligibility Criteria

Inclusion Criteria: * Adult patients not under legal protection * Patients aged ≥ 18 and \< 90 years * Patients with stage IIIA-B chronic kidney disease (CKD) (estimated GFR by CKD-EPI ≥ 30 mL/min and \< 60 mL/min) * Patients receiving optimized nephroprotective treatment (ACE inhibitors, SGLT2 inhibitors) * Patients who have signed the informed consent form * Patients not participating in another clinical study * Patients affiliated with or benefiting from a social security scheme Exclusion Criteria: * Adult patients under legal protection * Patients under 18 years old or over 90 years old * Patients with uncontrolled thyroid disorders * Patients with decompensated heart failure * Patients consuming other dietary supplements containing seaweed or iodine (e.g., multivitamins) * Pregnant or breastfeeding women * Patients with acute kidney injury * Patients who decline to participate in the study

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