Taurine vs Betaine: What to Choose and for Whom

Taurine and betaine rarely compete directly: each of them has its own niche, its own evidence base and its own safety limitations. Yet buyers often face the choice of which of the two separate supplements to add to the diet or which pre-workout complex to choose. The editorial team has put together a guide by goals, diet and state of health.

The logic of choice: acute effect or a course

The first practical difference between taurine and betaine is the pattern of use in studies. In sports work, taurine was most often taken once before exertion, assessing the acute effect on the result. Betaine, on the contrary, was usually given as a course over several weeks, counting on gradual changes in tissues.

This means that from taurine, if there is any effect at all, one can expect it on the day of intake, while from betaine only after regular use. Such a difference is important for planning: a person looking for help for a specific start will not be suited by a course product, and vice versa.

The second difference is the goal. The meta-analysis by Waldron et al. (2018) concerned endurance, whereas most studies of betaine summarized in the review by Cholewa et al. (2014) assessed strength, power, work volume and body composition. So the choice is largely determined by the sport.

The third difference is the safety profile. Taurine has a well-studied and wide safety margin in dietary amounts. For betaine, an important nuance is the effect on blood lipids, which people with elevated cholesterol need to take into account.

For endurance athletes

For runners, cyclists, triathletes and other endurance athletes, taurine looks like the more logical candidate. The meta-analysis by Waldron et al. (2018) showed a small but statistically noticeable improvement in endurance measures after a single intake, although the number of studies was small.

The mechanisms that researchers discuss include the effect of taurine on calcium metabolism in muscle fibers and on fat oxidation during exertion. However, these mechanisms have mostly been studied in animals and in laboratory conditions, so their practical role in humans remains a hypothesis.

It is important that many athletes already get taurine from energy drinks or sports gels. In that case there is little sense in adding yet another separate supplement: it is worth first looking at the composition of what you already consume.

Betaine has been studied much less for endurance, and there is no convincing data on benefit. Therefore, for athletes in this group, the editorial team considers proven strategies a priority - carbohydrates during prolonged work, hydration, caffeine - and only then, if desired, taurine.

For strength and speed-strength disciplines

For those who do resistance training, bodybuilding or speed-strength disciplines, there is more data on betaine. In a study by Cholewa et al. (2013), trained men were given 2.5 g of betaine per day over six weeks during a resistance program, and the authors reported an improvement in body composition and in the volume of work performed compared with placebo.

However, a review by the same group of authors (Cholewa et al., 2014) honestly acknowledges the heterogeneity of the results: some studies found no effect on strength or power. Therefore betaine can be regarded as an experimental “second-tier” supplement rather than as the basis of a program.

For strength goals, much better proven are creatine monohydrate, a sufficient amount of protein and calories, and a quality training program with progression of loads. Betaine makes sense to consider only when the basic factors are already in place.

Taurine has been studied less for strength disciplines, and there is insufficient data in favor of improving strength or hypertrophy. Its presence in pre-workout complexes is often explained by tradition rather than by research results.

Special situations: diet and health

Vegans and vegetarians get very little taurine from food, since its main sources are animal products. An adult body is able to synthesize taurine from cysteine, and there is no convincing data on clinical deficiency in healthy adult vegans. However, for people on a plant-based diet, taurine is one of the few supplements where the difference between “from food” and “from a jar” has at least theoretical sense.

With betaine the situation is the opposite: a plant-based diet with beet, spinach, whole grains and bran usually provides a noticeable amount of betaine. Therefore vegans need an additional betaine supplement less often.

People with elevated homocysteine should not self-treat with betaine. Elevated homocysteine can be a consequence of deficiency of folate, vitamin B12, B6, kidney disease or genetic features, and its cause should be established by a doctor. Anhydrous betaine is used as a medicinal product for homocystinuria, but only under medical supervision.

People with dyslipidemia should remember that betaine in doses of a few grams per day increased total cholesterol and LDL cholesterol in some studies. In that case it is better to discuss the appropriateness of the supplement with a doctor or to choose other tools.

Doses, safe limits and quality

For taurine, the sports studies included in the meta-analysis by Waldron et al. (2018) used single doses of roughly 1 to 6 g. At the same time, the risk assessment by Shao and Hathcock (2008) set an observed safe level of 3 g per day for daily supplemental intake, so for regular use it is reasonable not to exceed this limit, taking energy drinks and complexes into account.

For betaine, strength studies most often used 2.5 g per day, divided into intakes. Higher doses (on the order of 6 g per day) were studied mainly in the context of lowering homocysteine, and it is precisely with them that changes in the lipid profile are associated.

• Total amount.Count taurine and betaine from all products: energy drinks, pre-workout complexes, “fat burners.”
• Form.Betaine is sold as anhydrous betaine (for sport) and as betaine hydrochloride (used for other purposes) - these are different products.
• Purity.Choose manufacturers with an open composition and independent laboratory control.
• Doping control.Athletes should choose products with independent batch certification.

Remember that taurine as part of energy drinks comes bundled with caffeine and often sugar. Problems with heart rhythm, insomnia or anxiety against the background of energy drinks are linked primarily to caffeine, and switching to “pure” taurine does not make energy drinks safer.

Editorial conclusions

Taurine is an option for endurance athletes looking for an acute effect on the day of the start, and for people on a plant-based diet who want to compensate for the low intake from food. Betaine is an experimental supplement for strength disciplines and body-composition control, taken as a course.

In neither case do these substances replace proven tools: protein, creatine, carbohydrates, caffeine, sleep and competent training planning.

People with elevated cholesterol should be careful with betaine, and those who regularly drink energy drinks should count total taurine and remember caffeine.

The biochemical differences between the two substances are broken down in detail in the material “Taurine vs betaine: what's the difference.” We also recommend the articles “CLA vs L-carnitine: what to choose and for whom” and “Glutamine vs BCAA: what to choose and for whom.”

References

1. Waldron M, Patterson SD, Tallent J, Jeffries O. The effects of an oral taurine dose and supplementation period on endurance exercise performance in humans: a meta-analysis. Sports Med. 2018;48(5):1247–1253.
2. Cholewa JM, Guimarães-Ferreira L, Zanchi NE. Effects of betaine on performance and body composition: a review of recent findings and potential mechanisms. Amino Acids. 2014;46(8):1785–1793.
3. Cholewa JM, Wyszczelska-Rokiel M, Glowacki R, et al. Effects of betaine on body composition, performance, and homocysteine thiolactone. J Int Soc Sports Nutr. 2013;10(1):39.
4. Shao A, Hathcock JN. Risk assessment for the amino acids taurine, L-glutamine and L-arginine. Regul Toxicol Pharmacol. 2008;50(3):376–399.
5. Craig SA. Betaine in human nutrition. Am J Clin Nutr. 2004;80(3):539–549.
6. Huxtable RJ. Physiological actions of taurine. Physiol Rev. 1992;72(1):101–163.
7. Schwab U, Törrönen A, Toppinen L, et al. Betaine supplementation decreases plasma homocysteine concentrations but does not affect body weight, body composition, or resting energy expenditure in human subjects. Am J Clin Nutr. 2002;76(5):961–967.