It Works Thermofight X Review: Ingredients & Does It Work?

It Works! Thermofight X is the latest weight-loss formula from It Works!, the multi-level marketing company also known for its Ultimate Body Applicator wraps. This stimulant-based supplement promises to boost metabolism and burn fat quickly — but does It Works! back that up with real science, or is this another product riding on marketing hype? Our research team dug in.

What Is It Works Thermofight X?

Thermofight X, previously marketed as Thermofit, is a thermogenic weight-loss formula built around naturally sourced ingredients, positioned as a thermogenic alternative to the company’s Fat Fighter supplement. “Thermogenic” refers to heat production — since the body naturally produces heat as it burns calories, supplements marketed to burn fat or boost metabolism are typically branded this way.

How Did It Works Thermofight X Start?

It Works! was founded by Mark Pentecost, a Michigan teacher who developed a body wrap marketed for site-specific weight loss after watching his wife try one. According to Yale Scientific, site-specific (“spot”) fat loss isn’t actually possible — a detail that hasn’t stopped the product line from becoming a major MLM success story.

Distributors pay $100 to start, plus ongoing monthly inventory purchases and a $20 fee to keep their website active — costs that fall on the distributor whether or not they sell their stock. Despite hundreds of negative reviews and a weak Better Business Bureau rating, It Works! reportedly generated $538 million in 2014, according to Business Insider. Common complaints include ineffective products, disputed credit card charges, poor customer service, and reported side effects.

It Works Thermofight X Claims

Marketing claims include helping dieters lose 31 pounds in 90 days, containing “clinically proven” weight-loss ingredients, activating thermogenesis, boosting energy, and being soy-free, dairy-free, keto-friendly, non-GMO, and vegan. That’s a compelling list on paper — the real question is whether the actual ingredients back it up.

It Works Thermofight X Ingredients

The formula includes vitamin B12, capsicum fruit extract, chromium, raspberry ketones, and acai fruit extract.

Vitamin B12 — Supports red blood cell production and DNA synthesis, according to the National Heart, Lung, and Blood Institute, and is naturally found in meat, poultry, fish, and eggs.

Capsicum Fruit Extract — Also known as chili or red pepper. One small study in the Journal of Appetite found a temporary decrease in hunger, though the sample size was limited and more research is needed.

Chromium — An essential nutrient that supports insulin function; research in the Journal of Clinical Pharmacy and Therapeutics suggests chromium supplementation may help support blood sugar control.

Raspberry Ketones — Used across a range of medical, cosmetic, and nutritional products, though the U.S. National Library of Medicine notes there’s insufficient evidence to confirm meaningful benefits.

Acai Fruit Extract — Frequently marketed as a weight-loss “breakthrough,” though it can cause side effects, and its mineral content shouldn’t be taken in excessive doses.

Does It Works Thermofight X Work?

Our research didn’t turn up evidence supporting this formula’s fat-burning or metabolism-boosting claims as marketed. There are also documented warnings around potential side effects worth factoring into any decision.

It Works Thermofight X Benefits and Results

User reviews skew largely negative, and the Better Business Bureau has flagged concerns around billing practices tied to the product’s auto-ship program. Pricing is on the higher side too — $65 for a one-month supply, with automatic enrollment in recurring shipments that multiple BBB complaints describe as difficult to cancel, compounded by reportedly slow customer service.

It Works Thermofight X and Weight Loss

Meaningful metabolism and fat-loss support still comes down to regular exercise and a balanced diet — research from the American Dietary Association links increased fruit and vegetable intake specifically to weight loss. We found no clinical studies confirming that Thermofight X, or its earlier version Thermofit, works as an effective weight-loss supplement on its own.

How to Use It Works Thermofight X

One capsule twice daily with meals, alongside at least eight glasses of water per day.

Potential It Works Thermofight X Side Effects

Based on the ingredient profile, possible side effects include rapid heart rate, diarrhea, nausea, insomnia, restlessness, and abdominal pain.

The Bottom Line on It Works Thermofight X

We can’t recommend Thermofight X, or It Works! products more broadly, based on what our research uncovered. The ingredients here simply don’t carry strong enough evidence to support the “next-generation fat burner” positioning, and the combination of high cost, subscription complaints, and unremarkable results makes it a hard product to justify. A balanced diet and consistent exercise remain the foundation of genuine, lasting weight loss — and any supplement considered alongside that foundation should be backed by real, independent clinical evidence.

Explore more Belly Fat reviews and guides on our site.

For general guidance on healthy weight management, see the resources available from the CDC.