How Much Baking Soda to Reduce Lactic Acid?

The standard dose of baking soda (sodium bicarbonate) used to counteract exercise-related acid buildup is 0.3 grams per kilogram of body weight, taken roughly one to three hours before intense activity. For a 70-kilogram person, that works out to about 21 grams, or roughly four teaspoons dissolved in water. But that number only tells part of the story, because the dose that works on paper often collides with a stomach that wants no part of it, and the type of exercise you’re doing determines whether baking soda helps at all.

Why Baking Soda Affects Acid Buildup

During hard, fast exercise, your muscles produce hydrogen ions faster than the body can clear them. That accumulation of acid contributes to the burning sensation and loss of power that forces you to slow down or stop. Sodium bicarbonate acts as a buffer in the bloodstream, raising blood pH and the concentration of bicarbonate ions outside your muscle cells. This creates a steeper gradient that helps shuttle hydrogen ions out of the muscle and into the blood, where they can be neutralized. The International Society of Sports Nutrition describes sodium bicarbonate as ergogenic specifically because it reduces exercise-induced acidosis through this buffering mechanism.¹ Importantly, baking soda doesn’t eliminate lactic acid from your muscles. Lactate and hydrogen ions are produced together but managed separately by the body. The bicarbonate in your blood primarily mops up the hydrogen ions. Lactate itself is actually recycled as fuel.

Evidence from muscle biopsies shows that sodium bicarbonate ingestion can actually increase muscle lactate content and glycolytic activity during exercise, meaning your muscles are doing more anaerobic work, not less. The benefit comes from being able to tolerate and clear the acid byproducts faster, not from shutting down acid production.²

The Dose That Research Supports

The ISSN position stand on sodium bicarbonate identifies 0.3 g/kg of body weight as the optimal single dose. Below 0.2 g/kg, you’re unlikely to see any performance improvement at all. Going higher, to 0.4 or 0.5 g/kg, doesn’t add further benefit and sharply increases the chances of gastrointestinal misery.² The 0.3 g/kg dose is the figure that appears again and again across systematic reviews and meta-analyses examining anaerobic performance.³

In practical terms, here’s what that looks like for different body weights:

55 kg (121 lb): about 16.5 grams, roughly 3 teaspoons
70 kg (154 lb): about 21 grams, roughly 4 teaspoons
85 kg (187 lb): about 25.5 grams, roughly 5 teaspoons
100 kg (220 lb): about 30 grams, roughly 6 teaspoons

These amounts are dissolved in water and consumed in a single sitting. Most studies have participants take the dose anywhere from 90 to 240 minutes before exercise, with the majority using a window around two to three hours prior.³ The reason for that timing gap is partly to allow blood bicarbonate levels to peak, and partly to give your stomach a fighting chance to settle before you start moving hard.

The Stomach Problem

This is the part that limits baking soda supplementation more than anything else. When you drink a concentrated sodium bicarbonate solution, you’re dumping a highly concentrated liquid into your gut. The solution is roughly three times as concentrated as your blood plasma, which pulls water from surrounding tissue into the intestines. The result, across nearly all participants in one study, was multiple forms of gastrointestinal distress including diarrhea, bloating, nausea, and intense thirst.⁴ The severity varies from person to person, but “unpleasant” is the baseline experience for most people at the standard 0.3 g/kg dose taken as a liquid solution.

Several strategies exist to get around this problem. None of them are perfect, but they can make the difference between a protocol you’ll actually use and one you try once and abandon.

Strategies to Reduce Side Effects

Enteric-Coated Tablets

Enteric-coated sodium bicarbonate capsules or tablets are designed to pass through the stomach intact and dissolve in the small intestine instead. This bypasses the stomach entirely, which is where most of the discomfort originates. Research shows that enteric-coated formulations significantly reduce gastrointestinal symptoms compared to standard baking soda dissolved in water.⁵

Even better, the enteric coating appears to improve absorption efficiency. One study found that enteric-coated tablets achieved the same blood bicarbonate increase at a 25% lower dose: 0.225 g/kg instead of 0.3 g/kg, with significantly less gut discomfort.⁶ For someone who weighs 70 kg, that drops the required amount from about 21 grams to roughly 16 grams. Enteric-coated sodium bicarbonate capsules are available from sports nutrition retailers, though they cost more than a box of grocery-store baking soda.

Serial Loading Over Multiple Days

Instead of taking one large dose before competition, serial loading splits smaller doses across several days. A common protocol uses around 0.3–0.5 g/kg per day spread over multiple servings for three to seven days leading up to the event. Research on well-trained cyclists found that serial loading produced performance improvements comparable to a single acute dose, with significantly less stomach disturbance and lower peak blood alkalinity. Both approaches improved four-minute cycling power by a similar margin compared to placebo.⁷ Serial loading may be especially practical when you know your competition date in advance and want to avoid the gamble of a single-dose stomach catastrophe on race day.

A study on serial enteric-coated supplementation found that spreading the dose over multiple days improved anaerobic capacity significantly, with the serial group producing notably higher mean and peak power than placebo during repeated sprint bouts.⁸

What Types of Exercise Actually Benefit

Baking soda helps most when the exercise is intense enough and long enough to cause significant acid accumulation, but not so long that your body’s other buffering and energy systems take over. The sweet spot appears to be high-intensity efforts lasting roughly 30 seconds to about 10 minutes. A systematic review of 35 studies found that exercise bouts of four minutes or shorter showed the most consistent performance gains, with over half of those studies reporting positive results. Longer efforts beyond four minutes still showed some benefit, but the results were less consistent.¹

In practice, this means baking soda is most relevant for activities like 400- and 800-meter running, short cycling time trials, rowing sprints, swimming events of 100–400 meters, combat sports, CrossFit-style workouts, and repeated high-intensity intervals. For a long easy jog or a heavy one-rep-max lift, the hydrogen ion buildup isn’t the limiting factor, so buffering with baking soda won’t help much.

Using Baking Soda for Recovery Between Bouts

Most research focuses on taking baking soda before exercise, but there’s growing interest in using it between exercise bouts to speed acid clearance during recovery. A study on elite boxers gave them 0.3 g/kg of sodium bicarbonate after an initial exhausting effort and before a second bout. Blood pH before the second effort was meaningfully higher (about 1.4% above placebo), and blood bicarbonate levels were roughly 26% greater.⁹ This matters for tournament-style competition where athletes face multiple bouts in a single day with limited recovery time between them. The caveat is obvious: taking a stomach-disrupting supplement between bouts of combat sport is a bold move, and individual tolerance needs to be tested thoroughly in training first.

Combining Baking Soda with Beta-Alanine

Beta-alanine is another supplement that fights exercise-induced acid, but it works inside the muscle cell rather than in the bloodstream. It raises levels of carnosine, a molecule that buffers hydrogen ions right at the source. Since baking soda works outside the cell and beta-alanine works inside, combining them could theoretically provide layered buffering from both sides.

The evidence supports this idea, though the combined effect is modest. A meta-analysis found that combining both supplements improved exercise performance with a small but statistically significant effect, while neither supplement alone reached significance in the pooled analysis.¹⁰ One individual study found that beta-alanine and sodium bicarbonate each improved total work in upper-body sprints by about 7–8%, but taking both together produced a roughly 14% improvement, suggesting truly additive effects.¹¹ A separate systematic review recommended co-supplementation specifically for high-intensity efforts lasting between 30 seconds and 10 minutes.¹²

Beta-alanine requires daily loading over two to four weeks before it takes effect, so this combination demands planning. But for someone already taking beta-alanine and looking for an additional edge on competition day, adding baking soda at the standard 0.3 g/kg dose is a reasonable strategy.

Do Men and Women Respond Differently

Early research on baking soda was done almost exclusively on men. More recent work has started to examine whether sex influences the response, and the answer appears to be yes. A study on wrestlers found that progressive low-dose supplementation improved wrestling-specific performance in males but not in females, suggesting the response may be sex-specific.¹³ A more detailed dose-response study that tested three different doses based on fat-free mass found significant sex-by-treatment interactions: at the lowest dose tested, men experienced a greater increase in blood bicarbonate than women, and the peak and average power responses during subsequent anaerobic tests also differed between sexes.¹⁴

This doesn’t mean baking soda is useless for women, but it does mean the standard 0.3 g/kg recommendation was largely established in male athletes, and women may need different dosing or may experience different magnitudes of benefit. The research here is still catching up.

Sodium Citrate as an Alternative

If the taste and stomach effects of baking soda are deal-breakers, sodium citrate is worth knowing about. It works through a similar mechanism, raising blood bicarbonate and pH to buffer acid during exercise. Early research suggested citrate might actually be more effective than bicarbonate at elevating blood pH and enhancing intermittent exercise performance.¹⁵

However, a more recent study in highly trained female CrossFit athletes told a different story. Sodium bicarbonate raised pre-exercise blood bicarbonate levels significantly higher than sodium citrate, and performance times were faster with bicarbonate than with citrate, the combination of both, or placebo. Citrate alone and the combination didn’t significantly outperform placebo. On the other hand, gastrointestinal symptoms were higher with bicarbonate than with citrate.¹⁶ So sodium citrate is gentler on the stomach but may not deliver the same level of blood buffering. It’s a tradeoff worth considering, especially for athletes who’ve found baking soda intolerable.

Safety Limits and Who Should Avoid Baking Soda

At the doses used in exercise research, baking soda is generally safe for healthy people. It’s uncomfortable, but the body handles the temporary alkaline load by excreting the excess bicarbonate through the kidneys. Problems arise when doses are much higher than the exercise protocol, when someone takes it chronically without guidance, or when kidney function is already compromised.

Case reports in the medical literature describe serious outcomes from baking soda misuse. One case involved a 69-year-old man using baking soda as an alternative gout treatment who developed dangerous metabolic alkalosis, dangerously low potassium, acute kidney injury, and liver damage.¹⁷ The presentation of baking soda toxicity can include seizures, heart rhythm disturbances, and even cardiac arrest in severe cases.¹⁸ Acute massive ingestion has been associated with gastric rupture and high mortality, while chronic ingestion tends to cause severe metabolic alkalosis and electrolyte abnormalities.¹⁹

These cases involve either massively excessive doses or impaired kidney function that prevents the body from clearing the bicarbonate normally. For a healthy person taking 0.3 g/kg before a workout, the risk profile is limited to stomach upset and potentially some temporary fluid shifts. But people with kidney disease, high blood pressure, heart conditions, or those on sodium-restricted diets should steer clear of baking soda supplementation entirely, given its high sodium content and the kidney’s central role in managing the alkaline load.

Effects Beyond Muscles

An unexpected line of research has explored whether baking soda supplementation might affect cognitive performance after exercise. The rationale is indirect: by allowing greater lactate efflux from muscles, baking soda raises circulating lactate, which the brain can use as fuel and which may influence neurotrophin signaling. A study on elite combat sport athletes found that sodium bicarbonate supplementation alongside intense exercise was associated with improved working memory performance afterward. The researchers noted that exercise-induced lactate levels appeared to be the dominant mechanism improving memory, rather than changes in neurotrophins like BDNF or IGF-1.²⁰ This is a single study with a small sample, so it’s far too early to recommend baking soda as a brain booster. But it’s a reminder that buffering acid in one part of the body ripples outward in ways researchers are still mapping.