Noom vs. hCG Diet

Let’s take a closer look at noom vs hcg diet and what it genuinely offers.

The latest in weight-loss science and technology versus a diet plan from the 1950s — a lot has changed in how we approach weight loss since then. Today’s most effective programs support both body and mind. Does the hCG Diet offer that same kind of support?

Noom Vs Hcg Diet: What Is Noom?

Noom is a mobile weight-loss program offering 16 weeks of personalized support, including access to a human coach, followed by an optional weight-maintenance program of any length the user chooses. It combines calorie tracking, food logging, exercise tracking, and educational lessons with quizzes — always explaining not just what to change, but why it matters for your health.

What Is the hCG Diet?

The hCG Diet is a ketogenic-style plan combining hCG injections with an extremely low-calorie intake to drive rapid weight loss. First introduced in the 1950s, it’s remained one of the most enduring fad diets around. hCG, or human chorionic gonadotropin, is a hormone associated with pregnancy, though small amounts also occur naturally in men.

Noom vs. hCG Diet: History

Brief History of Noom

Founded in 2008 by Saeju Jeong and Artem Petakov around the idea that weight loss and the mind are more connected than most people realize, Noom brought in doctors and psychologists to build a genuinely integrated mind-and-body program. By 2018 it was among the most-searched diets on Google, and in 2019 it partnered with Novo Nordisk. It remains listed among the CDC’s official Lifestyle Programs.

Brief History of the hCG Diet

British endocrinologist Dr. Alfred Simeons developed the hCG Diet in the 1950s after observing what he believed was a link between hCG treatment and weight loss. One account traces his interest to treating adolescent boys with testosterone deficiency using hCG — since low testosterone often causes weight gain, and the boys lost weight faster than expected once combined with calorie control. Another account points to his time in India, where he noticed undernourished women giving birth to healthy babies, theorizing that low food intake boosted hCG production, prompting the body to draw on fat stores to sustain the pregnancy. Either way, Simeons researched the connection for years, eventually publishing Pounds and Inches in 1954 — the original hCG Diet manual.

Noom vs. hCG Diet: Who’s Behind the Plans?

Who Created Noom?

Petakov, drawn to coding since age nine and later to the psychology of decision-making in college, teamed up with Jeong, an entrepreneur since his teens who spent six years building BuyHard Productions in Korea. Jeong eventually convinced a hesitant Petakov to leave Google and co-found Noom.

Who Created the hCG Diet?

Dr. Alfred Simeons, largely London-raised, trained in medicine in Germany and later specialized in tropical medicine, practicing extensively in India and Rome. His 1954 book Pounds and Inches remains the foundational text behind today’s hCG Diet.

Noom vs. hCG Diet: The Rules

Rules of Noom

Noom centers on education, gradual lifestyle change, and consistent support, built on food logging, exercise tracking, and daily learning.

Food Logging: Green foods (about 30% of calories) include items like grapes, tomatoes, potatoes, whole grains, egg whites, most fish, and non-fat dairy. Yellow foods (about 45%) include avocado, couscous, chicken breast, lean beef, and low-fat dairy. Red foods (kept to 30% or less) include dried fruit, white bread, bacon, fried meats, alcohol, and sugary desserts.

Exercise Tracking: Burn 500 calories exercising on a 1,500-calorie goal, and 50% gets credited back, raising your total to 1,750.

Lessons, Quizzes, and Education: Just 10 minutes a day, building progressively toward lasting lifestyle change rather than a rigid diet mentality.

Rules of the hCG Diet

The original hCG protocol requires doctor-administered injections — hCG isn’t legally available in homeopathic form, supplements, or over-the-counter products. The plan unfolds in three phases: a two-day Loading Phase of high-calorie, high-fat eating alongside hCG injections; a Weight-Loss Phase lasting up to six weeks, capping intake at just 500 calories daily while continuing injections; and a three-week Maintenance Phase, stopping injections and slowly reintroducing calories while avoiding simple carbs. Common accompanying rules include drinking 64 ounces of water daily (plus unlimited unsweetened tea, coffee, or sparkling water), avoiding vitamin or mineral supplements (since some contain sugars that may stall progress), and “borrowing” food from other meals if you want to eat breakfast, since it’s often excluded from the base plan entirely.

Noom vs. hCG Diet: Eating Plans

The Noom Eating Plan

Personalized from an initial questionnaire and refined further with your coach, Noom’s plan starts with a calorie goal but ultimately teaches portion and nutrition intuition through the green/yellow/red system, so calorie counting eventually becomes unnecessary.

The hCG Diet Eating Plan

Just two meals a day — lunch and dinner — built from four food groups: meat, vegetables, bread, and fruit. Meat options are limited to extremely lean cuts like white fish, shrimp, crab, veal, skinless poultry, and 96% lean beef, grilled or boiled with no added fat, at a 3.5-ounce raw serving. Vegetable guidance varies by program but often centers on leafy greens, tomato, cucumber, celery, and cabbage, in 1-3 cup servings. Bread is typically limited to a single piece of Melba toast, and fruit choices are restricted to apple, strawberries, grapefruit, or orange in modest portions. One item from each category, twice daily, makes up the entire menu — no additional foods or snacks allowed.

Noom vs. hCG Diet: Plan Duration

Noom’s core program runs 16 weeks with optional ongoing maintenance support. The hCG Diet’s three phases together span roughly nine to ten weeks, though some proponents suggest repeating multiple cycles for larger weight-loss goals.

Key Differences Between Noom and the hCG Diet

Noom restricts no foods and keeps calorie recommendations within a nutritionally sound range, backed by clinical research showing lasting results. The hCG Diet does the opposite on both counts — severe restriction with no meaningful nutritional support.

Can You Follow the hCG Diet on Noom?

No. Noom never recommends calorie intake below 1,000 and doesn’t support extreme, medically unsupervised calorie restriction of any kind.

Possible Side Effects

Noom carries no notable side effects beyond weight loss. The hCG Diet’s extreme calorie restriction commonly causes muscle loss, a slowed metabolism as the body conserves energy, and symptoms including fatigue, headaches, constipation, stomach pain, growing hunger, and nausea — with more extreme cases risking a compromised immune system as the body turns to protein stores for fuel.

Noom vs. hCG Diet: The Research

A study of more than 35,000 Noom users in Scientific Reports found over 75% reported significant weight loss, and research in Metabolic Syndromes and Related Disorders confirmed better weight maintenance among Noom users versus non-users.

The hCG Diet’s research record is far less favorable. A 1977 double-blind trial in the Western Journal of Medicine found “weight loss was identical between the two groups, and there was no evidence for differential effects on hunger, mood or localized body measurements. Placebo injections, therefore, appear to be as effective as HCG in the treatment of obesity.” Nearly 40 years later, a 2016 review in the Journal of Dietary Supplements summed it up plainly: “after half a century still has no evidence to support [hCG Diet] efficacy; in fact, all scientific publications subsequent to the original article counter these claims.”

The Bottom Line: Noom vs. hCG Diet

The evidence here is about as clear-cut as it gets. Eating 500 calories a day isn’t sustainable with or without hCG injections, and no supplement claiming to contain hCG legally does — it’s a prescription-only hormone. Noom, by contrast, is genuinely clinically proven and requires just 10 minutes a day, offering a research-backed alternative to extreme, outdated fad dieting.

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Overall, noom vs hcg diet remains worth understanding before you decide.

Overall, noom vs hcg diet remains worth understanding before you decide.