The Slenderiiz Clinical Study: What the Numbers Actually Mean
Reading the 28-day results with clear eyes
The Slenderiiz system has published clinical study results showing 12.72 lbs lost in 28 days. Here is what those numbers actually mean — what the study measured, how it was conducted, and what they cannot tell you.
The Study at a Glance
In a 28-day open-label study, 32 of 41 participants completed the full program. The average results across completers:
- 12.72 lbs of average weight lost (14.75 lbs for men, 11.96 lbs for women)
- 10.87 inches lost across waist, hips, chest, and thighs combined
- 6.52% average reduction in body weight
Participants ranged in age from 28 to 54 and in starting weight from 140 to 354 lbs. The program they followed is described in detail on the Day & Night Drops product page and in the 28-Day Reset booklet.
What "Open-Label" Means
An open-label study means participants knew what they were taking — there was no placebo group or blinding. This is an important methodological distinction from a double-blind randomized controlled trial (the gold standard in clinical research).
Open-label studies are appropriate for establishing feasibility and observing real-world outcomes, but they cannot control for the placebo effect, for changes in behavior motivated by participation in a study, or for the independent effects of the dietary changes versus the supplement.
In plain terms: the results reflect what happens when people follow the complete program. They cannot isolate how much of the outcome was due to the Drops specifically versus the structured diet and caloric restriction.
Why the Results Are Still Meaningful
Knowing this, the results remain genuinely useful for a specific purpose: understanding what is achievable when you follow the program as designed. If your goal is to follow a structured 28-day program and you want a realistic sense of what outcomes other people have experienced, the study provides that data.
The results are not a guarantee of what you personally will experience. Your results will depend on your starting weight, adherence, metabolism, and a range of other individual factors.
The Participants Who Did Not Complete
Nine of 41 participants (about 22%) did not complete the study. Completion rates vary across any structured program and are an important contextual detail. The reported averages reflect only those who completed the full 28 days.
What This Means for Your Decision
If you are considering the Slenderiiz system, the clinical study gives you a realistic benchmark — not a promise. The most honest use of these numbers is to understand the upper range of what the program has delivered for motivated participants, and to set your own expectations accordingly.
Read more about what the 28-day reset actually involves, or get the free 7-Day Slender Start Checklist to begin building the habits the program requires before you commit.
Results from a 28-day open-label study. 32 of 41 participants completed the program. Individual results vary and are not guaranteed. This statement has not been evaluated by the FDA or Health Canada.