Based on eight rated factors, Down Size Black by Down Size Black and JetFuel Pyro by GAT Sport are equal in their overall effectiveness. The tables below display a side by side comparison allowing you to make a more informed decision on which product is more effective. The simple report at the top of the page is a quick and easy way to gauge product effectiveness. For more information, scroll down to the detailed report.

Community Vote

Have you used both products? If so, which worked better for you?

Down Size Black by Down Size Black JetFuel Pyro by GAT Sport

Simple Report

Products are graded and compared against each other in eight areas. A green check mark is placed under the product that scores higher in each category. An equal sign is shown in the event that both products are equal in one or more categories.

Down Size Black JetFuel Pyro
Effectiveness Rating
Transparency Score
Effective Ingredients
Ineffective Ingredients
Effective Claims
Ineffective Claims
Research Rating
Ranking Within Category
Total Score 3 3

The final score is tied at 3 - 3. To get a more detailed report on how each product is rated and which one is better tailored to fit your needs, scroll below to the detailed report.

Detailed Report

The effectiveness rating is an overall measure of how well a product works. This rating is a 3-point scale and is based on what peer reviewed research articles conclude about the ingredients found in a product. A rating equal to or greater than 2.5 means the product is extremely effective. A rating between 1.5 and 2.5 means the product is moderately effective. A rating equal to or less than 1.5 means the product is ineffective. This rating is a direct measure of whether or not a product does what it claims. Avoid products with ratings equal to or less than 1.5.

The transparency score is a percentage reflecting how many of a product's ingredients are listed with amounts on the nutrition label. Often, manufacturers create proprietary blends of ingredients which hide amounts under the guise of meaningless phrases. Avoid products that do not list 100% of their ingredient amounts.

Product ingredients are individually rated based on research from peer reviewed journal articles. The number of extremely effective, moderately effective, and ineffective ingredients illustrates what type of ingredients are found in the product. High quality products are those with a high amount of extremely effective ingredients combined with no ineffective ingredients. Avoid products with a high amount of ineffective ingredients.

Each ingredient has been tested on a number of different claims. A product can be effective or ineffective at certain claims based on its mix of ingredients. The number of effective and ineffective claims of a product illustrates how well a product is at doing what it advertises. Chose products with more effective claims and avoid ones with large numbers of ineffective claims.

A product's effectiveness rating comes from research on its ingredients. The research rating is a measure of how much research the database contains on a product's ingredients. A score below 60 indicates not enough research has been conducted on a product's ingredients to truly know whether those ingredients are effective. Scores above 60 are better. Scores above 60 are better while scores above 80 indicate the ingredients chosen by the manufacturer have adequate research backing their use.

All products are ranked against each other. The ranking within category displays how the product ranks against its competition. Choose products ranked highly while avoiding products ranked at the bottom.

Overview Down Size Black JetFuel Pyro
Manufacturer Down Size Black GAT Sport
Product Category Fat Burning Supplements Fat Burning Supplements
Effectiveness Rating
2.12 out of 3

1.85 out of 3
Transparency Score 20% 24%
Serving Size 2 capsules 3 capsules
Extremely Effective Ingredients 4 4
Moderately Effective Ingredients 5 5
Ineffective Ingredients 3 6
Effective Claims 23 23
Ineffective Claims 13 10
Research Rating
21.100

22.667
Ranking Within Category 491 out of 625 523 out of 625

Ingredient Comparison

This section compares the ingredients and amounts found in both products. Products with a transparency score under 100% do not have amounts for all ingredients listed on their labels.

Ingredient Down Size Black JetFuel Pyro
5-HTP not in product amt not listed
Acai Extract not in product amt not listed
Black Pepper Fruit Extract (Piperine) amt not listed 5mg
Black Tea Extract amt not listed not in product
Caffeine amt not listed 205mg
Caralluma Fimbriata Extract amt not listed not in product
Cha De Bugre amt not listed not in product
Chamomile not in product amt not listed
Chromium 200mcg not in product
Citrus Aurantium Extract not in product amt not listed
Dandelion Extract amt not listed not in product
Folic Acid 20mcg not in product
Fucoxanthin amt not listed not in product
Ginger not in product amt not listed
Ginseng not in product amt not listed
Golden Root Extract - Rhodiola not in product amt not listed
Gotu Kola Extract amt not listed not in product
Grape Seed Extract not in product amt not listed
Grapefruit Extract not in product amt not listed
Green Coffee Extract not in product amt not listed
Guarana amt not listed not in product
Kelp Extract amt not listed not in product
L-Theanine amt not listed not in product
Maca Extract not in product amt not listed
Mangosteen Extract not in product amt not listed
Medium Chain Triglycerides not in product amt not listed
Mucuna Pruriens amt not listed not in product
Niacin not in product 24mg
Olive Leaf Extract not in product amt not listed
P-Synephrine amt not listed not in product
Phenylethylamine amt not listed not in product
Raspberry Ketones not in product amt not listed
Sodium Starch Glycolate not in product amt not listed
Theobromine amt not listed not in product
Uva Ursi Leaf Extract amt not listed not in product
Vitamin B12 not in product 390mcg
Vitamin B6 3mg 3mg
Vitamin C 15mg not in product

Claim Comparison

Products are made from a mix of ingredients. There is evidence either proving or disproving claims for each ingredient. Some ingredients might be good at increasing muscle mass while at the same time being bad at improving cardiovascular endurance. This section provides information on which product is better for a specific claim. An equal sign means both products have the same rating for the specific claim.

Claim Down Size Black JetFuel Pyro
Decrease Body Fat
Decrease Calorie Intake
Decrease Cortisol Levels
Decrease Fatigue
Improve Agility
Improve Cardiovascular Endurance
Improve Cognitive Ability
Improve Cycling Performance
Improve Cycling Sprint Performance
Improve Glucose Control
Improve Immune Function
Improve Insulin Sensitivity
Improve Memory
Improve Mood
Improve Muscular Endurance
Improve Recovery
Improve Rowing Performance
Improve Running Performance
Improve Sleep Quality
Improve Sports Performance
Improve Sprint Performance
Increase Alertness
Increase Energy Expenditure
Increase Fat Burning
Increase HDL (good) Cholesterol Levels
Increase Muscle Mass
Increase Satiety
Increase Strength
Increase Testosterone
Increase Weight Loss
Lower Blood Pressure
Lower LDL (bad) Cholesterol Levels
Lower Total Cholesterol Levels
Maintain Muscle Mass During Weight Loss
Reduce Duration Of The Common Cold
Reduce Frequency Of The Common Cold
Reduce Joint Pain
Reduce Muscle Damage
Reduce Muscle Soreness
Reduce Severity Of The Common Cold
Suppress Appetite

Product Labels

Click on a label below for the full image.

Down Size Black JetFuel Pyro
Down Size Black by Down Size Black Product Label JetFuel Pyro by GAT Sport Product Label