BHB Salts Side Effects and Who Should Skip.

The short answer: The BHB salts side effects reported in research are mostly digestive: nausea, abdominal cramps and diarrhea, seen more with salts than with ketone esters and more at bigger doses. The minerals are the other half of the story. Salt drinks in a 2017 study carried 3.2 to 6.4 g of sodium and potassium combined per drink. Our capsule lists 146 mg of calcium and 1 mg each of magnesium and sodium per 2-capsule serving.

Key takeaways

• A 2020 review of ketone supplement research names nausea, abdominal cramps and diarrhea as common complaints after a single dose.
• Ketone salts appear to cause more gut symptoms than ketone esters, probably because their sodium and potassium hold extra water in the gut.
• The salt drinks in a 2017 study held 1.6 to 3.2 g of sodium each, about 70% to 139% of the 2,300 mg sodium Daily Value the FDA sets.
• Betterly's BHB Ketone Capsules list 1 mg of sodium and 146 mg of calcium (11% DV) per 2-capsule serving, and that small mineral load comes with far less BHB, too.

We sell both products on this page, starting with the BHB Ketone Capsules, so read us as an interested party. What we can offer is that bottle's real panel, checked row by row, and a straight account of where the research runs out.

What are the side effects of BHB salts?

The side effects of BHB salts reported most often are digestive: nausea, abdominal cramps and diarrhea, according to a 2020 review of ketone supplement studies.

BHB, short for beta-hydroxybutyrate, is a ketone body your liver makes from fat when carbohydrate is scarce. A BHB salt binds that molecule to a mineral, like calcium, magnesium, sodium or potassium, which turns it into a stable powder. Ketone esters, the main alternative, skip the mineral entirely.

The review, by Valenzuela and colleagues in Advances in Nutrition, notes that several studies found gut symptoms were common after a single ketone dose. Two patterns stood out: salts seemed to cause more symptoms than esters, and symptoms seemed to rise with the dose.

The review also says the picture isn't settled: in one comparison, ketone drinks caused more gut symptoms than carbohydrate drinks at rest, but not when both were taken during exercise.

Those studies were exercise research, mostly in healthy, well-trained adults drinking many grams of BHB at once. None tested a 2-capsule serving, so the review can't tell you how often capsules like ours upset a stomach.

Why does BHB cause diarrhea in some people?

BHB salts seem to cause more gut upset, diarrhea included, than ketone esters, and a 2020 review says the sodium and potassium they carry are the probable reason.

When a ketone salt dissolves, the mineral separates from the BHB. A large dose of dissolved sodium and potassium makes what's inside your intestine much saltier than usual. Your gut then holds on to more water, and the review's authors think that's why salts produce more symptoms than esters.

That explanation covers sodium and potassium only. It says nothing about calcium BHB, which comes first among the three BHB salts in our blend.

So does BHB cause diarrhea? At the multi-gram doses used in sports research, it can, and the salt form is the likelier culprit. At capsule-sized doses, the two papers we cite offer no answer.

Our capsule also contains MCT powder, a fat with stomach complaints of its own at large doses. Our side-by-side of exogenous ketones and MCT oil covers those.

How much mineral comes with a dose of BHB salts?

At research doses, BHB salts carry grams of minerals: each salt drink in a 2017 study delivered 3.2 to 6.4 g of sodium and potassium combined.

Stubbs and colleagues ran that study, published in Frontiers in Physiology. Their salt drinks held roughly 12 g or 24 g of BHB bound to sodium and potassium, with 1.6 to 3.2 g of each mineral per drink. Blood electrolytes in the volunteers shifted afterward, but the authors report they stayed normal.

For scale, the FDA's Sodium in Your Diet guidance puts the Daily Value under 2,300 mg a day and notes that Americans eat about 3,400 mg on average.

Read down the sodium column and the gap is hard to miss: the study drinks sit in grams, while both of our labels sit in milligrams.

That small number cuts both ways. Two capsules carry few minerals because they carry little of anything, BHB included, so the gentler load comes with far less BHB than the study drinks held.

Calcium, magnesium, sodium or potassium BHB: does the salt matter?

The type of BHB salt matters because each adds a different mineral, in whatever milligrams the panel prints.

• Sodium BHB adds to the sodium you already eat. Check its milligrams against the 2,300 mg Daily Value.
• Potassium BHB adds potassium. If you're under orders to watch your potassium, or a medicine you take affects it, ask first before using a potassium-heavy blend.
• Magnesium BHB adds magnesium. Ours lists 1 mg, but magnesium from several products adds up, and our guide to whether you can overdo electrolytes totals the federal limits mineral by mineral.
• Calcium BHB adds calcium, the one mineral our capsule carries in a real amount.

Calcium is where our own label deserves a closer look. According to the NIH Office of Dietary Supplements, calcium supplements might leave some people with gas, bloating or constipation. Its suggested fixes include taking the supplement with meals or switching to a different form of calcium.

ODS caps total daily calcium, counting every source, at 2,500 mg for adults up to age 50 and 2,000 mg after that. One 2-capsule serving of our BHB capsules is 146 mg, roughly 6% to 7% of those limits.

Are exogenous ketones safe, or are they dangerous?

Exogenous ketones side effects in the research we cite are mostly gut symptoms after one dose, and a 2020 review flags missing long-term safety evidence as an important caveat.

Gut symptoms were common enough for the review to flag them, yet blood electrolytes stayed normal in the 2017 study. Both findings come from single lab doses, not months of daily use.

Neither paper rates capsule doses as safe or dangerous. These habits push you further from anything studied:

• Taking more than a label's suggested use.
• Stacking several salt-based products on the same day, such as a BHB powder plus a salty sports drink.
• Taking ketone supplements daily for months, where the research is thinnest.

One mix-up to clear up: raspberry ketone isn't BHB at all. Our comparison of raspberry ketones and BHB sorts the two apart, and the side effects of raspberry ketone get a guide of their own.

What in our BHB Ketone Capsules could cause side effects?

Betterly's BHB Ketone Capsules list five blend ingredients, a gelatin shell and brown rice flour, and calcium is the only mineral above 1 mg per 2-capsule serving.

On this label, calcium is the number to count. The heavy sodium and potassium load behind the salt-drink symptoms isn't there.

The 800 mg on the front of the bottle is the whole Keto Proprietary Blend, not the BHB. The blend combines calcium citrate and MCT powder with calcium, magnesium and sodium BHB, and the panel prints no BHB total.

From our shop: BHB Ketone Capsules — calcium citrate and MCT powder lead its 800 mg blend, ahead of three BHB salts, with just 1 mg of sodium per 2-capsule serving.

How do you take BHB capsules according to the label?

The BHB Ketone Capsules label calls for two capsules a day with 6 to 8 oz (177 to 237 ml) of water and warns against going over that amount.

A few habits keep you inside those directions:

1. Start at the label amount and stay there. The label has no loading phase, and it prints "Do not exceed recommended dose."
2. Swallow them with the whole 6 to 8 oz of water, not a sip.
3. Take the capsules with food if that suits you. The label names no meal, and ODS lists taking calcium with meals as one way to ease gas or bloating.
4. Count your calcium across the day: 146 mg from this serving, plus any multivitamin, calcium pill or fortified drink.
5. Skip other salt-based ketone products on the same day, since two BHB sources would double up the salts.

Each bottle has 30 servings, 60 capsules in all. Timing, including spacing from an iron pill, has its own page: when to take exogenous ketones.

When can you skip BHB salts?

You can skip BHB salts if mineral supplements tend to upset your stomach, your calcium already runs near its upper limit, or what you're really after is electrolytes.

• Calcium pills have left you gassy, bloated or constipated before. Part of our capsule's calcium comes from calcium citrate, one of the two main forms ODS names in calcium supplements.
• Food, drinks and other pills already bring your calcium close to the upper limit ODS sets for your age group. Another 146 mg per 2-capsule serving only pushes that total higher.
• Salty sports drinks are a daily habit. A sodium-based BHB product would add more of the mineral the 2020 review suspects in salt-related gut upset.
• You want electrolytes, not ketones. Our BHB capsule lists 1 mg of sodium and no potassium, so a mix like our Electrolyte Hydration Powder (Lemonade) suits that job better.

Weighing another ketone product, from our Weight Support shelf or elsewhere? Read its sodium, potassium and calcium rows first.

From our shop: Electrolyte Hydration Powder (Lemonade) — 4% DV sodium and 200 mg of potassium per 1-scoop (5.4 g) serving, meant for 14 to 20 fl oz of water, with a label limit of 5 scoops a day.

Who should check with a healthcare provider first?

Get a healthcare provider's okay before trying BHB salts if you're pregnant or nursing, under 18, on prescription medicine, managing a medical condition or due for surgery.

Four of those groups come straight from the bottle: "Consult a physician if pregnant, nursing, under 18, or have a medical condition." The research in this post comes largely from healthy adults, many of them trained athletes, so it can't speak to pregnancy or nursing. A planned surgery is worth mentioning before you start anything new.

The salt form adds three more reasons to ask:

• Sodium or potassium limits. If you've been asked to limit either, note that the salt drinks in the 2017 study carried 1.6 to 3.2 g of each.
• Calcium a provider already tracks. Mention the 146 mg per 2-capsule serving, and know that ODS says calcium supplements can interfere with certain medicines.
• Gut trouble that lingers. If symptoms don't settle after you stop the product, check in with your provider instead of hoping it passes.

FAQ: BHB salts side effects

What happens if you take too much BHB?

Taking too much BHB mainly raises the chance of digestive trouble, since a 2020 Advances in Nutrition review found gut symptoms seem to climb with dose, and salt forms add more minerals too. The BHB Ketone Capsules label sets the amount at two capsules a day and adds "Do not exceed recommended dose," so there's no label-approved way to take more. If you've swallowed extra and don't feel right, call a healthcare provider.

Does BHB have a lot of sodium?

BHB's sodium depends on the product and the dose: our BHB Ketone Capsules list 1 mg per 2-capsule serving, while the 2017 study's research-dose salt drinks held 1.6 to 3.2 g. Any other BHB product prints its own figure on the sodium row. The FDA counts a serving with 5% DV of sodium or less as low and 20% DV or more as high, so that row's %DV gives you a quick read.

Do BHB salts interact with medications?

We found no BHB-specific drug interactions in the sources we cite, but the minerals in BHB salts can still matter. The NIH Office of Dietary Supplements warns that calcium supplements may interfere with some medicines, and our capsule lists 146 mg of calcium per 2-capsule serving. Sodium- or potassium-heavy salts matter too if your medicine affects those minerals. Show your pharmacist the full panel first.

Is calcium BHB easier on the stomach than sodium BHB?

No one can say from the sources we cite, because none of them compares calcium BHB with sodium BHB for stomach comfort. A 2020 Advances in Nutrition review points to sodium and potassium as the probable cause of extra gut upset from salt drinks, while ODS lists gas, bloating and constipation among the possible effects of calcium supplements for some people. On our panel, calcium is the one at a real dose: 146 mg per 2-capsule serving.

Are BHB Ketone Capsules vegetarian?

No, BHB Ketone Capsules aren't suitable for vegetarians, because the capsule shell is gelatin, according to the panel's other ingredients. The label makes no vegan or vegetarian claim. If you avoid animal products, look for a panel that names a plant-based shell, such as cellulose.

Sources

• Valenzuela PL, et al., Advances in Nutrition (2020), via PubMed Central: Perspective: Ketone Supplementation in Sports—Does It Work?
• Stubbs BJ, et al., Frontiers in Physiology (2017), via PubMed Central: On the Metabolism of Exogenous Ketones in Humans
• NIH Office of Dietary Supplements: Calcium: Fact Sheet for Consumers
• U.S. Food and Drug Administration: Sodium in Your Diet

If this left you looking for somewhere to start, read BHB salt capsules with 1 mg of sodium per 2-capsule serving — its amounts per serving are listed on the page. For the practical questions this raises, how dosing, sourcing and subscriptions work is answered in one place.