A Dietitian's Review of Prebeet® + No Bake B12 Boost Bites Recipe

As a vegan, vitamin B12 is always on my radar. It's one of the few nutrients that can be challenging to get enough of on a fully plant-based diet without supplementation.

Resbiotic offered to send me their Prebeet® powder, a prebiotic supplement that also has 1,000 mcg of methylcobalamin B12, so of course as the vegan dietitian I am, I had to give it a try. 

The product was gifted, and as always, I'm sharing my honest, unpaid review in this post. In this review of Resbiotic Prebeet®, we'll break down what's actually in it, whether the nutrition holds up, and I'll share a No-Bake B12 Boost Bites recipe I made using the powder.

Jump to Recipe

About Resbiotic & Prebeet®

Resbiotic is a physician-founded supplement company focused on microbiome health. All the products formulated are developed by a team of double board-certified physician-scientists and backed by published research.

One of their earlier products, resB Lung Support, was built around the gut-lung axis and backed by clinical trial data. Prebeet® is their second product and takes a different angle, targeting digestion, energy, heart health, and skin through a prebiotic-forward formula.

Before we get into the ingredients, it's worth clarifying something: Prebeet® is a prebiotic, not a probiotic. These two terms get used interchangeably, but they're not the same thing.

• Probiotics are live beneficial bacteria that you're adding to your gut microbiome.
• Prebiotics are the food that feeds those bacteria, fiber and compounds that help the good bacteria you already have grow and thrive.

The prebeet powder comes in a mixed-berry flavor and mixes into cold water, a smoothie, or as you'll see later in this post, energy balls. 

Is Prebeet® Vegan?

Prebeet® is 100% vegan and doesn't have any animal-based ingredients. There is no dairy, soy, or gelatin, and it is sweetened with stevia. 

One ingredient worth highlighting for vegans specifically is the form of B12 used: methylcobalamin. There are two common forms of B12 found in supplements: cyanocobalamin and methylcobalamin. 

• Cyanocobalamin is the synthetic form and requires your body to convert it into a usable form before it can be absorbed. 
• Methylcobalamin is the active form, meaning your body can use it right away without that extra conversion step.

Nutrition & Ingredient Breakdown

These are the ingredients and nutrition facts that stand out in Prebeet®, and whether they are substantiated by evidence to support the suggested claims.  

Resistant Potato Starch (Solnul®  3.5g 3500mg) ✅

Resistant potato starch is a type of prebiotic fiber that passes through the small intestine undigested and reaches the colon intact; from there it gets fermented by beneficial gut bacteria. 

Prebeet® uses a form of resistant potato starch called Solnul®, which has been studied specifically for its effect on gut bacteria. 

A randomized, placebo-controlled clinical trial published in the peer-reviewed journal Nutrients found that 3.5g of Solnul® per day (the same dose in one serving of Prebeet) significantly increased two types of beneficial gut bacteria. 

1. Bifidobacterium, is well known for supporting digestion and immune health.
2. Akkermansia, is a lesser-known but important bacteria that helps maintain the protective lining of your gut.

The study also found fewer bowel movements with the diarrhea and constipation groups than in the placebo group (1).

It's worth noting that while this research was conducted independently of Resbiotic, it was funded by MSP Starch Products Inc., the manufacturer of Solnul®. The study was peer-reviewed and published in a reputable journal, but, as always with supplement research, it's something to keep in mind when evaluating the claims.

Beetroot Juice Powder (Beta vulgaris 2,000mg) ❓

Beets are one of the best food sources of dietary nitrates, which the body converts into nitric oxide, a molecule that helps relax blood vessels, improving circulation, heart health, and natural energy. 

The label lists the ingredient as Beta vulgaris, the scientific Latin name for beets.

Prebeet's® primary strengths are its prebiotic fiber and B12, with beetroot playing a supportive role. A systematic review of clinical trials found that studies demonstrating cardiovascular benefits used doses of approximately 300-500mg of dietary nitrates (2), but because Prebeet lists 2,000mg of beetroot juice powder by total weight rather than nitrate content, a direct comparison is difficult to make. 

That said, beetroot isn't the only thing in this product that supports energy; B12 helps with that too.

Vitamin B12 as Methylcobalamin (1,000mcg) ✅

For vegans, B12 is one of the most important nutrients to consider. It's found almost exclusively in animal products, which means on a fully plant-based diet, supplementation is likely needed. 

B12 plays a critical role in energy metabolism, neurological function, and red blood cell production, and low levels can lead to fatigue, brain fog, and nerve damage if left unaddressed.

Prebeet® uses methylcobalamin, the most bioavailable form of B12, at 1,000mcg per serving, well above the RDA of 2.4mcg per day. B12 absorption is tricky, and the body can only absorb a small percentage of a large dose at once, so higher doses are standard practice so enough actually makes it into circulation.

Taste & Texture

The flavor is berry forward and pleasant. This is the first time I've used a supplement powder in a recipe, and if you're looking for ways to use it beyond stirring it into water, no-bake recipes are the way to go. Heat can degrade methylcobalamin, so keeping it in a no-bake recipe helps preserve the B12 content.

The one thing worth noting is the texture; the powder doesn't fully dissolve in water and leaves a slight grittiness. It's not a dealbreaker, but if you're mixing it into a drink, a shaker bottle works better than a spoon. Blending it into a smoothie or using it in a recipe like the B12 Balls below eliminates the issue entirely.

Cost Breakdown

The overall cost breakdown of a 30 serving bag of prebeet® is regularly priced at $59.99. A subscribe and save option is available for delivery every 27 days at $47.99 per jar which is comparable to other functional drink packets.

If you want to try this product after reading my review, you can lessen your shipping cost with my code RHYAN at checkout. You will save most, if not all, of the shipping cost. The shipping cost to Phoenix is $4.95, and my code takes $4.79 off. 

You can find Prebeet® on their website, Amazon, and GNC. If you order on their website.

B12 Balls Recipe (using Prebeet® Powder)

As a vegan, getting enough B12 is something I'm always thinking about, and these no-bake bites make it a little more fun. 

Each ball has around 900mcg of B12, and they come together in one bowl with no baking required.

A quick note: these are not intended to replace your regular B12 supplement, and if you're on any medications or managing a health condition, check in with your healthcare provider before adding them to your routine.

Recipe

My Overall Review of Resbiotic Prebeet®

TLDR; if you skimmed and ended up here, this is an overview of what I liked and what I didn't like about prebeet®

Pros:

• Meaningful B12 dose in the most bioavailable form, major win for vegans
• Clinically studied prebiotic ingredient (Solnul®)
• Low FODMAP certified, accessible for sensitive guts
• Versatile enough to cook or bake with or simply mix into water

Cons:

• GLP-1 claims are based on cellular studies, not human trials
• Limited availability in the store and have to be purchased online.
• Cost may be a barrier; however, code RHYAN will save you 15%. 

Want to learn more about B12? Check out my B12 article, and as always, if you're thinking of adding new products to your diet, consult with your healthcare provider