Betaine Anhydrous Supplement Ingredient

Impact

High effect

Typical dose:500–3000 mg

Betaine (trimethylglycine or TMG) supports the methylation cycle by donating a methyl group to recycle homocysteine into methionine. This provides robust support for SAMe production and conserves the body's folate and B12 pools, enhancing overall methylation capacity.

Study evidence

4 studies

Betaine Anhydrous can lower blood homocysteine, but this specific metabolic effect does not establish a general detoxification benefit. The available human research does not consistently show improved liver health, and supplementation can also raise cholesterol.

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Fitness

Impact

High effect

Typical dose:1250–2500 mg

Betaine, or trimethylglycine (TMG), acts as both a methyl donor and an osmolyte. As an osmolyte, it helps protect cells from stress by maintaining hydration, and as a methyl donor it may support creatine synthesis, contributing to observed increases in strength and power.

Study evidence

16 studies

Betaine Anhydrous may modestly improve some measures of fitness, particularly lower-body strength, but benefits are inconsistent. The available research does not show reliable improvements across endurance, power, or body composition, and findings in trained athletes may not apply to everyone.

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Weight Gain

Impact

Moderate effect

Typical dose:1.5–5 g

Betaine acts as an osmolyte, protecting cells from stress and helping maintain hydration. It also functions as a methyl donor, which may support endogenous creatine production and other metabolic processes. Research has shown it can significantly improve performance in exercises like the bench press and squat, allowing for more total volume to be lifted.

Study evidence

13 studies

Betaine anhydrous has not been shown to reliably promote weight gain. Some exercise studies suggest gains in lean mass, but pooled supplementation research finds no clear effect on body weight or lean mass, and dietary associations do not establish a supplement benefit.

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Digestive Health

Impact

Situational effect

Typical dose:500–2000 mg

Often supplemented as Betaine HCl, it helps increase gastric acidity. Sufficient stomach acid is crucial for activating pepsin to digest protein, sterilizing food, and signaling downstream digestive processes. This is particularly useful for relieving symptoms of hypochlorhydria.

Study evidence

1 study

Betaine anhydrous has a possible role in supporting the gut barrier and gut–liver communication, mainly discussed in chronic liver disease research. The supplied evidence does not establish that supplementation improves everyday digestion or treats digestive disorders in people.

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Muscle Gain

Impact

Situational effect

Typical dose:1.25–2.5 g

Its mechanisms may involve enhancing endogenous creatine synthesis and protecting cells from stress. While not as impactful as primary ergogenics, it can provide an additional edge in performance.

Study evidence

7 studies

Betaine Anhydrous has mixed evidence for muscle gain during training. Some research suggests improvements in body composition or exercise performance, but other controlled findings show no added muscle growth, and associations with higher betaine levels do not prove a supplement benefit.

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