Carb Curb

Carb Curb

30 DAYS
30 DAYS
Skip to product information
Carb Curb
  • Carb Curb
  • Jar of macra capsules on a beige background
  • Carb Curb
  • Carb Curb
Carb Curb

Bestseller

Carb Curb

CB-628

Confidence with carbs. Take before meals. Stay energized after.

supplement facts

WHITE KIDNEY BEAN EXTRACT USERS REPORTED:

66% reduction in starch absorption during meals*
88% of participants showed reduced post-meal glucose spikes*
71% experienced sustained energy levels

Based on published clinical research on white kidney bean extract at 1000mg/day, green tea extract at 300mg/day, ginger root at 200mg/day, black pepper extract at 30mg/day, and chromium picolinate at 400mcg/day in adults. Results reflect these ingredients at their studied doses, not this product specifically. Individual results may vary. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Choose your plan:
SAVE 20% |POPULAR

CARB-SMART RECIPE GUIDE

Carb-Smart Recipe Guide

Carb-Smart Recipe Guide

FREE $10 value

REFILLABLE GLASS JAR

Refillable Glass Jar

Refillable Glass Jar

FREE $20 value

SAVE 30% |AUTO APPLIED IN CART

CARB-SMART RECIPE GUIDE

Carb-Smart Recipe Guide

Carb-Smart Recipe Guide

FREE $10 value

REFILLABLE GLASS JAR

Refillable Glass Jar

Refillable Glass Jar

FREE $20 value

MACRA TRAVEL TIN

Macra Travel Tin

Macra Travel Tin

FREE $10 value

MACRA TUMBLER

Macra Tumbler

Macra Tumbler

40 OZ BOTTLE

The Macra Tumbler is your everyday hydration essential. Crafted from stainless steel to keep drinks cold longer, with a sleek design that goes wherever you do.

FREE $30 value

90 Day Moneyback Guarantee | Free 2-3 Day Shipping

Made With Standards

Transparent Label

Purposeful Ingredients

No Hidden Blends

  • description

    Carb Curb is a daily carbohydrate-support formula featuring five clinically studied ingredients: white kidney bean extract, green tea extract, zingiber officinale, black pepper extract, and chromium picolinate. Supporting carbohydrate wellness and nutrition goals as part of your daily routine. White kidney bean extract supports healthy carb processing, green tea provides antioxidant support, and chromium supports healthy glucose metabolism. Take 2 capsules before your biggest carb meal.*

  • ingredients

    Premium 5-ingredient formula featuring 1,000mg White Kidney Bean Extract, 300mg Green Tea Extract (60% Polyphenols), 200mg Zingiber officinale (5% Gingerol), Black Pepper Extract for enhanced absorption, and Chromium Picolinate. Supporting carbohydrate wellness as part of your daily routine.*

  • how to enjoy

    Take 2 capsules with water before your biggest carb meal of the day. Embrace mindful eating and balanced nutrition as part of your daily wellness routine.

  • clinical research

    White kidney bean extract studied in randomized trials with 200+ participants for carbohydrate support. Green tea extract researched in numerous studies for antioxidant properties. Chromium studied for healthy glucose metabolism support. Our dosages match the exact amounts proven effective in peer-reviewed research.*

    *This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Mood Bloom

Mood Bloom

Daily mood support
$69.00 Add – $69.00
Carb Curb
Supplement Facts
Serving Size:
2 Capsules
Servings Per Container:
30
Amount per serving % DV
White Kidney Bean Extract 1000 mg **
Green Tea Extract
(50% Polyphenols)
 300 mg **
Zingiber officinale
(5% Gingerol)
 200 mg **
Black Pepper Extract
(95% Piperine)
 30 mg **
Chromium Picolinate 400 mcg **

** Daily Value not established.

Other Ingredients: Rice Flour, Vegetable Capsule

quality
gmp
vegan
Black leaf-shaped symbol on a white background

Clinically-studied ingredients

Black leaf-shaped symbol on a white background

Third-party tested

Black leaf-shaped symbol on a white background

No artificial sweeteners

Black leaf-shaped symbol on a white background

Vegan & gluten-free

Black leaf-shaped symbol on a white background

Designed for daily use

how does Carb Curb work?

Enjoy your favorite carbs with less compromise. Carb Curb helps limit carb absorption using white kidney bean extract, Close-up of dried beans with a beige and brown color patternGold circular object with intricate design on a white background plus green tea, ginger, and chromium to support digestion, metabolism, and balanced blood sugar.*

our science
Carb Curb

Carb control you can feel

  • WEEK 1

    Support carb processing

    Start supporting healthy carb metabolism when taken before starch-heavy meals.*

  • WEEK 2

    Maintain steady energy

    Support more balanced energy levels after eating, helping reduce that heavy feeling.*

  • WEEK 3

    Feel lighter after meals

    Experience easier digestion and less bloating as your body processes carbs more efficiently.

  • WEEK 4

    Enjoy carbs with confidence

    Maintain better carb control over time so you can enjoy your favorite foods without second-guessing.

Clinically studied for metabolism

Carbs Aren't the Enemy. Absorption Is.

Carb Curb is a daily formula designed to help reduce starch absorption, support balanced post-meal blood sugar response, and may help you feel lighter after carb-heavy meals. Take two (2) capsules daily, preferably with your biggest carb meal of the day.

Carb Curb

Carb Curb

CLINICAL RESULTS

Supports carb digestion & reduced starch absorption*

Based on published clinical trials of key ingredients at their studied doses

66%

Proven reduction in starch breakdown from meals vs. control group*†

Safe

Daily use demonstrated in multiple clinical studies with excellent tolerance†

2x

More effective than placebo for supporting healthy carb processing*†

*Based on published clinical research on white kidney bean extract at 1000mg/day in adults (PMC7284421). Results reflect the ingredient at its studied dose, not this product specifically. Individual results may vary. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Clinically studied for metabolism

Carb Curb is a daily formula designed to help reduce starch absorption, support balanced post-meal blood sugar response, and may help you feel lighter after carb-heavy meals. Take two (2) capsules daily, preferably with your biggest carb meal of the day.

Carb Curb

Carb Curb

Proven reduction in starch breakdown from meals vs. control group*†

Daily use demonstrated in multiple clinical studies with excellent tolerance†

More effective than placebo for supporting healthy carb processing*†

*Based on published clinical research on white kidney bean extract at 1000mg/day in adults (PMC7284421). Results reflect the ingredient at its studied dose, not this product specifically. Individual results may vary. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Science-backed mood support

Saffron, L-theanine, Rhodiola rosea. Three clinically studied ingredients for a calmer, happier you.

Mood Bloom combines three ingredients studied for mood and stress support. Premium saffron extract supports positive mood and emotional balance. L-theanine promotes relaxation without sedation. Rhodiola rosea helps your body adapt to daily stressors naturally. Take 1 capsule daily for best results.*

Mood Bloom

Mood Bloom

CLINICAL RESULTS

Supports calmer mood & stress response*

Based on published clinical trials of key ingredients at their studied doses

p<0.001

Saffron extract produced significantly better depression scores vs. placebo in 6-week RCT*†

3x

Better stress adaptation with rhodiola vs. placebo in 12-week clinical trial†

4 weeks

L-theanine significantly reduced anxiety and depression scores vs. placebo in just 4 weeks*†

Based on published clinical research on saffron extract at 30mg/day, rhodiola rosea at 200-576mg/day, and L-theanine at 200mg/day in adults. Results reflect these ingredients at their studied doses, not this product specifically. Individual results may vary. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Science-backed mood support

Mood Bloom combines three ingredients studied for mood and stress support. Premium saffron extract supports positive mood and emotional balance. L-theanine promotes relaxation without sedation. Rhodiola rosea helps your body adapt to daily stressors naturally. Take 1 capsule daily for best results.*

Mood Bloom

Mood Bloom

Saffron extract produced significantly better depression scores vs. placebo in 6-week RCT*†

Better stress adaptation with rhodiola vs. placebo in 12-week clinical trial†

L-theanine significantly reduced anxiety and depression scores vs. placebo in just 4 weeks*†

Based on published clinical research on saffron extract at 30mg/day, rhodiola rosea at 200-576mg/day, and L-theanine at 200mg/day in adults. Results reflect these ingredients at their studied doses, not this product specifically. Individual results may vary. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Clean ingredients,
you can trust

see full ingredient list

White Kidney Bean Extract (Phaseolus vulgaris)

White Kidney Bean Extract (Phaseolus vulgaris)
  • Inhibits alpha-amylase (starch-digesting enzyme)
  • Supports post-meal blood sugar balance
  • Reduces carbohydrate absorption

1000mg

Green Tea Extract (EGCG)

Green Tea Extract (EGCG)
  • Supports healthy metabolism
  • Rich in EGCG antioxidants
  • Promotes fat oxidation

300mg

Ginger (Zingiber officinale)

Ginger (Zingiber officinale)
  • Supports comfortable digestion
  • Promotes healthy gastric motility
  • Reduces post-meal discomfort

200mg

Black Pepper Extract (Piperine)

Black Pepper Extract (Piperine)
  • Enhances absorption of co-administered ingredients
  • Bioavailability amplifier

30mg

Chromium Picolinate

Chromium Picolinate
  • Supports healthy carbohydrate metabolism
  • Helps maintain blood sugar levels already within normal range

400mcg

us vs. the rest

No drugs, no diets,
just natural support

Targets carb absorption

On-demand support

Avg. cost per day

Quick relief time

Natural ingredients

Long-term sustainability

macra logo
$1.84/day
Prescription Drugs
$25-100/day
White circular object with a central cutout on a beige background
Probiotics
$2-3/day
Half-cut avocado on a white plate
Low Carb / Keto
$7-12/day

Based on published clinical research on saffron extract at 30mg/day, rhodiola rosea at 200-576mg/day, and L-theanine at 200mg/day in adults. Results reflect these ingredients at their studied doses, not this product specifically. Individual results may vary. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

“I noticed a real difference after meals. I feel lighter, less bloated, and my energy stays steady instead of crashing later in the day.”

josie B.

josie B.

after taking Carb Curb for 2 weeks

“Carb Curb is a game changer for family pizza night. Take two capsules before we order and I actually enjoy the meal without feeling like I need to unbutton my pants after. The kids think I'm more fun now that I'm not complaining about feeling heavy.”

Tony R.

Tony R.

after taking Carb Curb for 2 weeks

“Love going out for Italian food but always regretted it later. Started taking Carb Curb 20 minutes before pasta dinners and wow, such a difference. I can actually enjoy the bread basket without the usual food coma afterward. Macra nailed this one.”

Maria S.

Maria S.

after taking Carb Curb for 2 weeks

Jar of capsules on a wooden cutting board with sliced avocados and lemons.

How to take Carb Curb

take before you eat

1

TAKE BEFORE YOU EAT

Take with water 15–20 minutes before your meal This gives the ingredients time to activate before food hits your system.*

enjoy your meal

2

ENJOY YOUR MEAL

Once the 15–20 minutes are up, eat like you normally would. No special rules, no changes to what you put on your plate.*

feel the Difference

3

FEEL THE DIFFERENCE

Most customers report feeling less heaviness, smoother digestion, and a more balanced feeling after eating.*

how it works

the science
of
carb-absorption

Macra's Carb Curb, containing White Kidney Bean Extract, helps to moderate the digestion of complex carbohydrates, thereby slowing their conversion into simple sugars and supporting balanced blood glucose levels.*

Clinical studies show that 1,000mg of White Kidney Bean Extract can reduce starch absorption by up to 66% when taken before meals. This natural alpha-amylase inhibitor works specifically on complex carbohydrates like bread, pasta, and rice, supporting your wellness goals around carb-heavy meals without affecting simple sugars.*


*This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Real reviews, real confidence

4.7
Rated 4.7 out of 5 stars
Based on 65 reviews
Total 5 star reviews: 45 Total 4 star reviews: 20 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Write a Review (Opens in a new window)
65 reviews
  • Alexa K.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    Yesterday
    Feel so much better after eating

    I eat a lot of rice and bread - it's just part of my diet - and I always felt sluggish after. Started taking 2 capsules before my biggest meal of the day and within a couple weeks I noticed I wasn't hitting that wall. Really happy with this purchase.

    Was this helpful?
  • Faith R.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 days ago
    Does exactly what it says

    Love love love this. I take it 15 minutes before my biggest carb meal which is usually dinner. The difference in how I feel the next morning is noticeable - less puffiness, less of that heavy feeling. My energy is more consistent throughout the day too.

    Was this helpful?
  • Felicia J.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    4 days ago
    My new pre-meal ritual

    I eat a lot of rice and bread - it's just part of my diet - and I always felt sluggish after. Started taking 2 capsules before my biggest meal of the day and within a couple weeks I noticed I wasn't hitting that wall. Really happy with this purchase.

    Was this helpful?
  • Nicole B.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    6 days ago
    Less bloated, more energy

    The ingredient list is legit - white kidney bean, green tea, chromium - all things that have actual research behind them. I appreciated that going in and the results have been consistent with what the science suggests. Lighter after meals, better energy, less bloating.

    Was this helpful?
  • Beth S.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    My new pre-meal ritual

    I do meal prep on Sundays and I always make pasta or grain bowls. Started taking these before dinner and within two weeks I stopped getting that heavy, post-meal exhaustion. I don't feel like I need to lie down after eating anymore which is huge for me.

    Was this helpful?

You may also like

Frequently asked questions

  • What ingredients are in Carb Curb and why?

    White Kidney Bean Extract (1,000mg): Clinically studied for carbohydrate support Green Tea Extract (300mg, 60% Polyphenols): Antioxidant support and metabolism Zingiber officinale (200mg, 5% Gingerol): Digestive wellness support Black Pepper Extract (95% Piperine): Enhanced absorption of other ingredients Chromium Picolinate (400mcg): Supports healthy glucose metabolism*

  • Does Carb Curb work on all types of carbs?

    No. Carb Curb works specifically on starch-based carbs (bread, pasta, rice, oats, potatoes). It does not affect simple sugars found in candy, soda, juice, or fruit. If your meal is primarily simple sugars, Carb Curb will have minimal effect. It's designed for complex-carb, starchy meals.*

  • Will Carb Curb cause digestive issues?

    Some people may experience mild bloating or gas when first starting Carb Curb, particularly with large starchy meals. This typically resolves within 1-2 weeks as your body adjusts. Starting with smaller starchy meals for the first few uses can help minimize this. Discontinue use if digestive discomfort persists.*

  • Is Carb Curb safe with diabetes medications?

    If you have diabetes or take blood sugar medications (including metformin, insulin, or GLP-1 agonists), consult your doctor before using Carb Curb. White kidney bean extract may affect postprandial blood glucose, which could interact with diabetes medications. Always check with your healthcare provider first.*

  • What exactly does Carb Curb do?

    Carb Curb features 1,000mg of clinically studied white kidney bean extract that may help slow the breakdown of dietary starch into sugars. It works specifically on starch-based carbs (bread, pasta, rice, potatoes) by supporting your body's natural carbohydrate processing. Take 2 capsules before meals containing complex carbs.*