⚡ medical evaluation in 24 hours — No commitment
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Our Doctors About ZENKAI Founders Contact Patient Portal Start Medical Evaluation
Online endocrinologist, anywhere in Brazil

Weight loss with
real medical
follow-up.

A CFM-registered endocrinologist reviews your case online within 24 hours and builds a treatment plan individualized to your clinical picture. Continuous monthly follow-up. R$ 299/month, no commitment.

  • ✓
    CFM-registered endocrinologist reviews within 24 hours
  • ✓
    Treatment plan individualized to your clinical picture
  • ✓
    Teleconsultation under CFM Resolution 2.314/2022
  • ✓
    Monthly medical follow-up, with adjustments
  • ✓
    No insurance plan, no waiting list
  • ✓
    24/7 AI coach for adherence and questions
  • ✓
    Cancel anytime. No commitment.
ZENKAI Peso
Obesity Treatment
Choose your plan
Quarterly Plan Most Popular
3 months of follow-up + adjustments included
R$ 299
/month
Monthly Plan
Renews monthly, cancel anytime, no hassle
R$ 399
/month
What's included
✓  Full medical consultation
✓  Individualized treatment plan
✓  Legally valid digital prescription
✓  Monthly medical follow-up
✓  24-hour AI coaching
✓  Plan adjustments at no extra cost
Start Medical Evaluation
If the doctor doesn't approve you, you pay nothing
🏥
CFM
📄
ICP-Brasil
🔒
LGPD
📦
72h
24h
From evaluation to the doctor's response
100%
CFM-registered physicians
100%
ICP-Brasil digital prescription, valid nationwide
R$299/month
Follow-up included — no consultation fee
ZENKAI Peso patient
Real results

Up to 15% body weight reduction in 6 months.

Doctor reviews in 24h. Digital prescription valid nationwide. 24/7 AI follow-up included.

Start Medical Evaluation →
How It Works

Obesity is a chronic disease. We treat it like one.

Obesity is not a lack of willpower. It is a chronic, relapsing, multifactorial disease — recognized as such by the WHO and by ABESO. Treating it takes clinical evaluation, an individualized plan, and continuous follow-up. That is exactly what ZENKAI Peso does.

🩺
Clinical evaluation
Endocrinologist
You complete a detailed health questionnaire covering history, comorbidities, medications in use, and goals. A CFM-registered endocrinologist reviews your case within 24 hours and determines whether treatment is indicated.
CFM 2.314/2022Response in 24hEndocrinologist
📋
Individualized plan
Your clinical picture
There is no single protocol. The physician builds a plan for your case: therapeutic conduct, nutrition guidance, physical activity, and monitoring of the markers that matter for you. Every clinical decision belongs to the physician.
IndividualizedMedical conductFull picture
📈
Continuous follow-up
Monthly
Obesity treatment does not end at the consultation. Every month the physician reviews your progress, adjusts what needs adjusting, and monitors tolerability. Between appointments, a 24/7 AI coach supports you on habits and routine.
Monthly reviewAdjustmentsAI coach 24/7
📈
Expected results
Evidence-Based
In the STEP 1 clinical trial, participants lost an average of 15% of body weight over 68 weeks. More than 86% achieved at least 5% weight reduction. Results maintained after 2 years of continuous use.
15% average loss68 weeksSTEP 1 Trial
Compare your options

What does doing it the right way cost?

The 4 most common paths Brazilians take when trying to lose weight. ZENKAI Peso delivers real medical care, online, at an accessible price.

Gray Market
Telegram / Instagram
Self-medication
No medical evaluation
In-person Clinic
Endocrinologist, in person
★ Recommended
ZENKAI Peso
Telemedicine + CFM endocrinologist
Clinical evaluation ✗ None ✗ None ✓ In person ✓ Online, in 24h
Individualized plan ✗ Generic ✗ None ✓ Yes ✓ Yes
Responsible doctor ✗ Anonymous seller ✗ None ✓ Clinic endocrinologist ✓ CFM endocrinologist
Follow-up ✗ None ✗ None Monthly — in person ✓ Monthly + 24/7 AI coach
Time to start Instant Instant 7–14 days 24 hours
Monthly cost Variable Variable R$ 400–700
per consult
 R$ 299
Follow-up included
Legal / health risk ⚠ High ⚠ High ✓ Zero ✓ Zero — ANVISA + CFM

Comparison of care models. In-person consult pricing based on market research in São Paulo and Rio de Janeiro, Jan 2026, and varies by region and professional.

Clinical evidence

The evidence behind our protocol.

A base clínica que sustenta o acompanhamento médico da ZENKAI.

📊
Clinical Evidence

"Obesity treatment must be individualized and include continuous, long-term follow-up, since it is a chronic and relapsing disease."

Brazilian Obesity Guidelines
ABESO — Brazilian Association for the Study of Obesity
Frequently Asked Questions

Frequently asked questions.

How does treatment at ZENKAI work? ▾
You complete a detailed health questionnaire. A CFM-registered Brazilian endocrinologist reviews your case within 24 hours, by teleconsultation under CFM Resolution 2.314/2022. Where there is a clinical indication, the physician defines an individualized treatment plan for your case and follows your progress monthly.
Do I need lab work before the consultation? ▾
Not necessarily for the first evaluation, but the physician may request a blood count, thyroid function, glucose and other tests before defining the course of treatment, depending on your history. If you already have recent results, you can upload them during the questionnaire to speed things up.
Who is the treatment for? ▾
Medical obesity treatment is generally indicated for adults with a BMI above 30, or above 27 when associated comorbidities are present (type 2 diabetes, hypertension, dyslipidemia). The indication is always individual and determined by the responsible physician after reviewing your case.
What course of treatment might the doctor recommend? ▾
That depends exclusively on the physician's clinical evaluation and your individual picture. The plan may involve nutrition guidance, habit changes and, where indicated, pharmacological treatment. ZENKAI does not recommend, suggest or sell medications — the therapeutic decision belongs to the responsible physician and is discussed directly with you in the consultation.
What is included in the R$ 299/month? ▾
A medical consultation with an endocrinologist, an individualized treatment plan, monthly follow-up with adjustments to the plan, and an AI coach available 24 hours a day for everyday questions. Any prescribed medication is purchased separately by you, at the pharmacy of your choice.
Does ZENKAI sell medications? ▾
No. ZENKAI is a telemedicine platform — we do not manufacture, compound, stock or sell medications. We connect you to CFM-registered Brazilian physicians. If a prescription is issued, you present it at the pharmacy of your choice.
Can I cancel whenever I want? ▾
Yes. No lock-in, no cancellation fee. Cancel through the patient portal or by messaging support at any time.

Start your medical evaluation today.

A doctor reviews your case within 24 hours. If you aren't approved, you pay nothing.

Start Medical Evaluation
CFM-Licensed Doctor
ICP-Brasil Digital Prescription
Monthly Follow-up Included
No Health Insurance Needed
Cancel Anytime
Start Medical Evaluation — From R$ 149/month
⚡

ZENKAI Health Coach

AI · Available 24/7

LGPD-compliant · Does not replace a medical consultation