28 cal 1g net carbs 5g protein
WiO Multigrain Bread
$8.99
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The Science
Eighteen years in real food.
Formulated to reduce the digestion of the starch in this food, starch being the kind of carbohydrate in bread, pasta, and potatoes. Built on independently studied ingredients.
4.6 across 2,700+ verified reviews Made in USA 70,000+ customers Since 2008
How MetaBloc works.
MetaBloc is the formula in every WiO food, built on independently studied ingredients.
0 cal
From MetaBloc itself
40 yrs
Of the active ingredient in pharmaceutical use, with an established safety record
GRAS
Recognized as Generally Recognized as Safe by the U.S. FDA for food use
Two labels per bag.
Nutrition Facts. Digestive Facts. Both on every product. WiO may be the first food brand to print both panels. The FDA published guidance in 1993 on labeling foods with non-absorbed components. We follow it. One panel shows what goes in. The other shows what your body absorbs.
Nutrition FactsWiO Tortilla Chips 8oz
- Calories28
- Total Fat0g
- Total Carbohydrate6g
- Dietary Fiber4g
- Protein5g
vs
Digestive FactsWhat your body absorbs
- Calories28
- Total Fat0g
- Net Carbs2g
- Fiber (not absorbed)4g
- Protein5g
Values shown are from the product's own Nutrition Facts and Digestive Facts panels.
An independent overfeeding study of six people over 14 days.
An independent, double-blind crossover study at the Applied Science and Performance Institute in Tampa, FL tested one 12-oz jar of peanut butter daily for 14 days. Same total calories in both arms. The groups differed only in the fiber.
Design
n = 6
Double-blind crossover, 14 days per arm
Measured
DXA
Body composition, with matched total calories
Sample size is small (n = 6); the crossover design compensates because each subject served as their own control. Full results are pending publication. The citation is listed on this page.
Read the full study breakdownReviewed by regulators on three continents.
FDA GRAS
MetaBloc's active ingredient is recognized as Generally Recognized as Safe (GRAS) by the U.S. Food and Drug Administration for food use.
European Food Safety Authority
The European Food Safety Authority (EFSA) has reviewed and approved MetaBloc's active ingredient for use as a food ingredient in the EU.
Health Canada
Health Canada has approved MetaBloc's active ingredient for use in food products sold in Canada. The same ingredient, the same approval record.
40 years in pharma
MetaBloc's active ingredient has been used in pharmaceutical drug delivery for over 40 years. The safety profile is well established across that use.
Built on published research.
All studies listed are publicly available in peer-reviewed journals. WiO does not control or sponsor the research. We use the science.
- Grunberger G, Jen KL, Artiss JD. (2007). Benefits of early intervention in obese diabetic patients with new dietary fibre, cyclodextrin. Diabetes Metab Res Rev. 23(1):56-62.
- Buckley JD, Howe PR. (2013). Acute reductions in dietary fat absorption with alpha-cyclodextrin in healthy adults. Br J Nutr. 110(7):1278-1284.
- Comerford KB, Artiss JD, Jen KL, Karakas SE. (2011). Beneficial effects of alpha-cyclodextrin on blood lipids and weight in healthy humans. Obesity (Silver Spring). 19(6):1200-1204.
- Gallaher DD, Gallaher CM, Plank DW. (2007). Alpha-cyclodextrin selectively increases fecal excretion of saturated fats. FASEB J. 21:702.
- Jarosz PA, Fletcher E, Elserafy E, Artiss JD, Jen KL. (2013). Effect of alpha-cyclodextrin on postprandial lipid and glycemic responses to a fat-containing meal. Metabolism. 62(10):1443-1447.
- Artiss JD, Brogan K, Brucal M, Moghaddam M, Jen KL. (2006). Effects of a new soluble dietary fiber on weight gain and selected blood parameters in rats. Metabolism. 55(2):195-202.
Six key studies shown. See the full reference list on the peanut butter study page, or contact us for the complete bibliography.
See the full reference listFrom the kitchen: the science figured it out. I just put it in your food.
Jason WhitneyFounder, Since 2008
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The same formula. Every product.
MetaBloc, the formula from the study, is in every WiO product. Start anywhere.
18 cal 1g net carbs 9g protein
WiO Pizza Crust · 3-pack
$13.49
Subscribe & save 10% on every order
31 cal 1g net carbs 7g protein
WiO Creamy Peanut Butter
$12.59
The jar from the study
Questions about the science.
Is it safe?
Yes. MetaBloc's active ingredient is recognized as Generally Recognized as Safe (GRAS) by the U.S. FDA for food use, and has been used in pharmaceutical drug delivery for over 40 years. It is a naturally derived formula, not a drug or stimulant.
Will I feel a difference?
The formula works in your digestive tract, so you won't feel it the way you feel caffeine. What you will notice is real food that fits your macros: full-flavor bread, pizza, and peanut butter with calories and carbs the label can account for.
Can I eat as much as I want?
WiO is built to fit a calorie- and carb-conscious routine, not to remove portion sense. Total intake still matters. Eat it as you would any food you enjoy.
Does heating affect MetaBloc?
No. The formula is heat-stable across normal baking and cooking temperatures, which is why it can be blended directly into bread, pizza crust, and other baked goods without breaking down.
Where should I start?
Most people start with a bestseller: the Multigrain Bread, the Pizza Crust, or the Creamy Peanut Butter from the study. Subscribe to a single favorite, or build a box to mix and match across the lineup.
Is WiO a supplement or a program?
WiO is food, not a program or a supplement. It is low-carb food made to taste like the real thing. We share the published research so you can read the science yourself and decide how it fits your routine.
Two ways to start.
Start with one product or mix and match. Both options use the same formula.
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Mix and match across the full lineup. One subscription, one delivery, variety every time.
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