Review · Gut health

DigestSync review: a small scoop of fiber with a big story

DigestSync is a flavored powder built around baobab fruit and konjac fiber. Both have some human research behind them. The question is whether a 2.4 gram blend can deliver what that research used.

By Grant Whitaker, Editor · Updated October 23, 2026 · 16 sources checked on PubMed

What DigestSync is

DigestSync is a powdered dietary supplement sold in jars through Digistore24. Each jar holds 90 grams, or 30 scoops of 3 grams. You mix one scoop into 8 to 16 ounces of liquid once a day. The label says it is distributed for DigestSync from an address in Largo, Florida, and assembled in the USA. We found no separate parent company named on the site or label.

The front of the jar promises digestive comfort, a healthy microbiome and help with occasional bloating and gas. The sales page frames the product around the vagus nerve, the long nerve that links the brainstem with the gut, and says the formula supports that nerve and a healthy inflammatory response. It is sold as a one-time purchase in 1, 3 and 6-jar packages.

What is on the label

The Supplement Facts panel lists a single proprietary blend of 2.4 g per scoop containing, in label order: pea starch, wildcrafted baobab, "Sukre", konjac glucomannan (Amorphophallus konjac) and biogenic polyamines. Other ingredients are silicon dioxide, natural flavors and stevia. No individual amounts are given. Labels list blend ingredients from most to least by weight, so pea starch is the largest part and konjac sits near the bottom.

Two items are hard to evaluate at all. "Sukre" is not defined anywhere we could find on the label or the sales page, so we cannot tell you what it is. "Biogenic polyamines" names a class of compounds, such as spermidine, without saying which ones, from what source or how much. We do not reproduce the label image here because the vendor publishes no permission to use it; you can view it on the official site.

The formula next to the research

Because the label hides individual doses, the comparison below uses the only firm number we have: the whole blend weighs 2.4 g. Any single ingredient must be less than that.

Konjac glucomannan: the best-studied ingredient, at an unknown dose

Glucomannan is a soluble fiber from the konjac root that absorbs a great deal of water and forms a thick gel. It is the ingredient in DigestSync with the most relevant human data, though the trials are small.

In a Taiwanese study, eight healthy adults on a low-fiber diet took 4.5 g of konjac a day (1.5 g with each meal) for three weeks after a three-week placebo period. Bowel movement frequency rose by about 27%, stool weight increased, and stool samples showed more lactobacilli and bifidobacteria and more short-chain fatty acids ^[2]. The same group then tested the same 4.5 g dose in seven adults who had fewer than one bowel movement a day; weekly frequency went from about 4.1 to 5.3 ^[1]. Neither study was randomized, and both were tiny.

The strongest design we found is a 2025 double-blind randomized trial in male taekwondo athletes who met the Rome IV criteria for functional constipation. After eight weeks, the konjac group reported better scores on bowel symptom and quality of life questionnaires and more frequent bowel movements than the placebo group, along with shifts in gut bacteria ^[3]. The published abstract does not state the dose, so we cannot compare it with DigestSync. Results are not uniformly positive: in a four-week randomized trial in 72 children aged 3 to 16, 2.52 g a day did no better than placebo on the main outcome ^[4].

The takeaway: konjac fiber has modest, consistent evidence for stool frequency in adults at around 4.5 g a day. DigestSync lists konjac fourth of five ingredients in a 2.4 g blend, so the daily amount is very likely a fraction of that.

Baobab: interesting fiber, studied at much larger amounts

Baobab fruit pulp is rich in pectin, a fermentable fiber, and in polyphenols. Its human research is short-term. In a UK study, baobab extract taken as a drink (18.5 g or 37 g) alongside white bread lowered the blood sugar rise after the meal, with no effect on fullness or energy expenditure ^[6]. In a single-day crossover study with 20 adults, a smoothie with 15 g of baobab lowered self-rated hunger, though people did not eat fewer calories at the next meal ^[7].

For gut bacteria the evidence is a laboratory one. In a test-tube fermentation with stool from three adult donors, baobab pulp powder increased short-chain fatty acids such as acetate and propionate, with donor-to-donor differences in which bacteria grew ^[8]. A placebo-controlled human trial of 16 g a day for 45 days on gut barrier and microbiome markers has been designed and published as a protocol, but results were not available when we checked ^[9]. Every human study we found used at least 15 g, more than six times the entire DigestSync scoop.

Pea starch and polyamines: no digestive trials to point to

Pea starch is the first ingredient listed, which makes it the largest share of the blend. Some processed starches resist digestion and feed gut bacteria, but the label does not say whether this is a resistant starch, and we found no human trial of a pea starch supplement on digestive comfort.

Polyamines such as spermidine are made by the body and found in foods like wheat germ and aged cheese. The human supplement trials we found looked at other outcomes. In the 12-month SmartAge trial, 100 adults aged 60 to 90 took a wheat germ extract providing 0.9 mg of spermidine a day; memory did not change compared with placebo ^[10]. A 28-day trial in 37 men aged 50 to 70 found 40 mg a day of purified spermidine well tolerated, with little change in blood polyamine levels ^[11]. Neither measured digestion, and DigestSync does not say which polyamines it uses or how much.

What the marketing claims vs. what we could verify

The sales page says DigestSync works by nourishing the vagus nerve, which it describes as controlling how food moves from the stomach to the intestines, and that inflammation, "often triggered by widespread antibiotic use", damages that nerve. The vendor's affiliate page goes further, linking the product to weight loss and a faster metabolism.

Part of the background is accurate. The vagus nerve does carry signals that help regulate stomach and intestinal muscle activity ^[12]. The leap is from that physiology to this powder. The vagus nerve paper on the vendor's own reference list is a review of electrical vagus nerve stimulation, an implanted or external device approach studied in people with inflammatory bowel conditions ^[13]. It does not involve baobab, konjac, pea starch or polyamines. We searched PubMed and found no human study showing that any DigestSync ingredient acts on the vagus nerve.

On weight, a systematic review of glucomannan found some short-term weight differences in adults in a few trials but no effect on BMI, using doses well above what this blend can contain ^[5]. We do not treat DigestSync as a weight product, and readers should not expect weight change from it. Finally, the sales page shows a star rating "based on 13,643 reviews" without saying where those reviews were collected; we could not verify that figure.

Price, packages and refund policy

One jar holds 30 daily scoops. Prices on the official site when we checked:

• 6 jars: $49 each ($294 total), free US shipping, two digital guides included. About $1.63 a day.
• 3 jars: $59 each ($177 total). About $1.97 a day.
• 1 jar: $69. About $2.30 a day.

The shipping policy lists free US delivery on all orders (5 to 7 working days) and $15.95 to Canada, the UK, Ireland, Australia and New Zealand. The order is a one-time payment with no autoship, according to the FAQ. After the first order, the checkout may offer additional jars at a lower price; you can decline those offers.

For context, each $1.63 to $2.30 scoop delivers 2.4 g of the active blend. Konjac glucomannan and baobab powder are also sold as single ingredients, which lets you choose amounts closer to those used in the studies. The 60-day refund window starts on the delivery date, but the refund policy requires you to email support and send back all jars, opened or not, and you pay the return postage. The vendor also suggests using the product for three months, which is longer than the refund window.

Safety

The ingredients are foods or food-derived fibers, and the trials above reported them as generally well tolerated. A few points matter more for men over 50:

• Mix it with plenty of liquid. Konjac glucomannan swells quickly in water. Case reports describe the esophagus becoming blocked after people took glucomannan in tablet form or with too little fluid ^{[15] [14]}. The label's 8 to 16 ounces of liquid is the right approach; if you have any trouble swallowing or a known narrowing of the esophagus, ask your doctor before using any konjac product.
• Space it from medications. Glucomannan has been reported to possibly change how well other oral medicines are absorbed ^[14]. A common precaution is to take prescription drugs at a different time of day from fiber supplements. Ask your pharmacist or doctor how to time it with your own medications, especially for diabetes medicines, since baobab and fiber can blunt blood sugar rises after meals ^[6].
• Expect some gas at first. Fermentable fibers can increase gas and bloating while your gut adjusts, and one child trial saw more abdominal pain episodes in some weeks on glucomannan ^[4].
• Stevia and "natural flavors" are listed but not quantified; people sensitive to sweeteners may want to note that.

Results vary from person to person. Talk to your doctor before starting DigestSync if you take any prescription medication or have a digestive condition. New or worsening digestive symptoms, symptoms that persist, blood in the stool, trouble swallowing or unexplained weight loss deserve medical attention promptly, and a supplement should never delay that.

What we liked and what gave us pause

Frequently asked questions

What kind of product is DigestSync?

It is a flavored powder you stir into a drink. Each 3 g scoop contains a 2.4 g fiber-based blend of pea starch, baobab, konjac glucomannan, an ingredient listed as "Sukre" and biogenic polyamines, plus flavor, stevia and an anti-caking agent.

Where can I buy DigestSync?

On the official website, with checkout handled by Digistore24. The vendor does not allow sales on Amazon, eBay or similar marketplaces, so listings there may not be genuine or covered by the refund policy.

How long before I notice anything?

Results vary. The konjac studies ran three to eight weeks at higher doses than DigestSync can contain. If you try it, give it a few weeks and keep in mind the 60-day refund window starts at delivery.

Can I take it with my medications?

Ask your doctor or pharmacist first. Fiber supplements can affect how some drugs are absorbed, so timing matters. Do not stop or change a prescription on your own.

Is it a subscription?

No. According to the official FAQ, every package is a one-time payment.

How we reviewed DigestSync

We read the official sales page, the Supplement Facts label, the FAQ, the shipping and refund policies and the vendor's own reference list. We then searched PubMed for human studies of each ingredient on digestion, bowel habits and gut bacteria, opened every study we cite, and compared the doses used there with what a 2.4 g blend can hold. We did not test the product on people, and nobody at Stark Verve is a medical professional. Read our editorial policy to learn how we choose and update reviews. Stark Verve earns a commission if you buy through our links; that never changes what we write about the evidence.