S-acetyl glutathione supplements look similar until you compare the actual dose, capsule count, delivery system, and whether the front-label number describes pure S-acetyl glutathione or a proprietary complex. These ten products make those tradeoffs easier to see.
S-acetyl glutathione, also written S-acetyl-L-glutathione or SAG, is an acetylated form of glutathione designed to remain more stable during digestion. It is not the same product as reduced glutathione, liposomal glutathione, or N-acetyl-L-cysteine (NAC). That distinction matters because shoppers often compare milligrams across forms as though they were interchangeable.
Jarrow S-Acetyl L-Glutathione is our best overall pick. Each tablet supplies a clearly disclosed 100 milligrams of SAG, the bottle contains 60 one-tablet servings, and the formula avoids the dose ambiguity found in proprietary delivery complexes. TerraForm is the better high-dose choice at 300 milligrams per acid-resistant capsule, while Pure TheraPro Rx has the longest simple-formula supply with 120 capsules. For a broader comparison of reduced, liposomal, sustained-release, and precursor products, see our best glutathione supplements guide.
Short on time? Start with Jarrow S-Acetyl L-Glutathione for a straightforward 100 mg one-tablet serving and a two-month bottle. Check the current price on Amazon.
Quick Comparison
| Rank | Product | Label distinction | Rating |
|---|---|---|---|
| 1 | Jarrow S-Acetyl L-Glutathione | 100 mg per tablet; 60 servings | 4.7/5 |
| 2 | TerraForm Extra Strength SAG | 300 mg per acid-resistant capsule | 4.6/5 |
| 3 | Pure TheraPro Rx Glutathione GOLD | 100 mg Emothion per capsule; 120 servings | 4.5/5 |
| 4 | Double Wood S-Acetyl L-Glutathione | 100 mg per capsule; public lot testing | 4.5/5 |
| 5 | Nutricost S-Acetyl L-Glutathione | 100 mg per vegan capsule; 60 servings | 4.3/5 |
| 6 | Designs for Health SAG Synergy | 200 mg SAG plus 1,000 mg NAC and 10 mg B6 | 4.2/5 |
| 7 | XYMOGEN S-Acetyl Glutathione | 200 mg per two acid-resistant capsules | 4.1/5 |
| 8 | SuperSmart S-Acetyl Glutathione | 300 mg per three-capsule serving | 4.0/5 |
| 9 | MaxLife Naturals S-Acetyl Glutathione | 300 mg serving; acid-resistant capsules | 3.9/5 |
| 10 | Tesseract SafeCell | 300 mg proprietary SAG delivery complex | 3.7/5 |
What Matters Before the Rankings
Our ratings prioritize a disclosed SAG amount, clear serving math, capsule burden, formula simplicity, and useful quality information. Human evidence for S-acetyl glutathione remains limited. A 2026 European Food Safety Authority assessment concluded that SAG is safe for adults at the proposed intake of 300 mg per day, excluding pregnant and lactating people, but it explicitly did not assess whether the ingredient delivers a claimed health benefit.1
The same assessment reviewed a small crossover study in 18 adults comparing a single 3.5-gram dose of SAG with ordinary glutathione. Plasma glutathione exposure was higher after SAG, but red-blood-cell exposure was higher after ordinary glutathione, variability was high, and the doses were not equimolar. That is not strong evidence that a 100 to 300 mg daily supplement improves energy, immunity, liver function, skin tone, or athletic recovery. We therefore rank these as products, not treatments. Readers comparing a conventional antioxidant nutrient can use our separate vitamin C supplement guide.
The 10 Best S-Acetyl Glutathione Supplements
1. Jarrow S-Acetyl L-Glutathione – Best Overall
Jarrow S-Acetyl L-Glutathione 100 mg 60 Tablets
Best OverallThe clearest one-tablet formula for shoppers who want a simple 100 mg SAG serving without a proprietary blend.
Pros
- 100 mg SAG clearly listed per tablet
- One tablet per serving
- 60 servings in the bottle
Cons
- Tablet has more excipients than the simplest capsules
- Costs more per 100 mg than some budget options
Jarrow gets the fundamentals right. One tablet contains 100 mg S-acetyl-L-glutathione, so the 60-tablet bottle supplies 60 servings. The company also identifies the product as vegan, non-GMO, and free from its listed major allergens. There is no liposomal blend, NAC, or undisclosed delivery complex to complicate the comparison.
The tradeoff is the tablet base, which includes calcium phosphate, cellulose, stearic acid, a coating, silicon dioxide, and magnesium stearate. Pure TheraPro Rx has a shorter excipient list, while TerraForm supplies three times as much SAG per capsule. Choose Jarrow for transparent everyday serving math. Skip it if you specifically want an acid-resistant capsule or a 300 mg serving.
2. TerraForm Extra Strength SAG – Best 300 mg Capsule
TerraForm Nutrition S-Acetyl Glutathione 300 mg 60 Capsules
Best 300 mg CapsuleA clearly labeled high-dose option that puts 300 mg of SAG in one acid-resistant capsule.
Pros
- 300 mg SAG per capsule
- Acid-resistant hypromellose shell
- 60 one-capsule servings
Cons
- High dose gives less room to adjust gradually
- Costs more per bottle than 100 mg formulas
TerraForm supplies 300 mg S-acetyl glutathione in one acid-resistant hypromellose capsule. The 60-count bottle therefore provides 60 servings, not the 20 or 30 servings common among high-dose products that require multiple capsules. The maker lists microcrystalline cellulose, silicon dioxide, and magnesium stearate as the other ingredients.
This is the cleanest high-dose comparison in the group, but a larger number is not automatically better. The EFSA adult safety conclusion applies at 300 mg per day under its proposed conditions of use, not to multiple daily 300 mg servings or to claims of extra effectiveness.1 Skip TerraForm if you want to start at 100 mg or adjust in smaller steps; Jarrow, Double Wood, and Nutricost make that easier.
3. Pure TheraPro Rx Glutathione GOLD – Best Long-Supply Simple Formula
Pure TheraPro Rx Glutathione GOLD 100 mg 120 Capsules
Long-Supply Simple FormulaA 120-serving acid-resistant option with a short ingredient list and branded Emothion SAG.
Pros
- 100 mg Emothion SAG per capsule
- 120 acid-resistant capsules
- Minimal listed excipients
Cons
- Premium upfront price
- Brand also sells a 200 mg variant, so check the exact bottle
Pure TheraPro Rx uses 100 mg of Emothion S-acetyl glutathione in an acid-resistant hypromellose capsule. The selected 120-count bottle supplies 120 one-capsule servings, twice Jarrow’s count. Its label is unusually restrained: SAG and the capsule shell are the listed ingredients.
The brand also sells a 200 mg, 60-capsule version under a similar name. Match the 100 mg strength and 120-capsule count to ASIN B00JK30832 before comparing value. Choose this one for the long supply and minimal formula. Skip it if the higher upfront price matters more than capsule shell or branded ingredient sourcing; Double Wood and Nutricost are closer budget comparisons.
4. Double Wood S-Acetyl L-Glutathione – Best Testing Transparency
Double Wood S-Acetyl L-Glutathione 100 mg 60 Capsules
Testing TransparencyA straightforward 100 mg capsule backed by accessible lot-level potency and contaminant results.
Pros
- 100 mg SAG per capsule
- 60 one-capsule servings
- Public lot test report available
Cons
- Maker suggests a one-to-two-capsule range
- Not an acid-resistant capsule
Double Wood lists 100 mg S-acetyl-L-glutathione per capsule and 60 capsules per bottle. Its strongest differentiator is accessible batch documentation. The current public report includes SAG potency, capsule weight, disintegration, heavy metals, and microbial results, with the tested lot identified. Match that lot number to the bottle when using the report as a buying signal.
The maker suggests one to two capsules daily, so the bottle lasts either 60 or 30 days depending on use. Its standard capsule is not the acid-resistant format used by TerraForm, Pure TheraPro Rx, and XYMOGEN. Choose Double Wood when visible lot data matters most. Skip it if you want a single 300 mg capsule or a four-month supply at 100 mg.
5. Nutricost S-Acetyl L-Glutathione – Best Budget 100 mg Option
Nutricost S-Acetyl L-Glutathione 100 mg 60 Capsules
Budget 100 mg OptionA simple 100 mg vegan capsule from a value-focused brand, with easy serving math and no blend.
Pros
- 100 mg per vegan capsule
- 60 one-capsule servings
- Made in an NSF-certified GMP-compliant facility
Cons
- Newer product with little buyer history
- No acid-resistant delivery claim
Nutricost’s formula is easy to place beside Jarrow and Double Wood: one vegan capsule supplies 100 mg S-acetyl-L-glutathione, and the bottle contains 60 capsules. The company states that the product is made in an NSF-certified, GMP-compliant facility and is independently tested. There are no extra active ingredients to total against another supplement.
This is a newer listing, so it lacks the longer public product history of Jarrow or the visible lot report Double Wood publishes. It also does not claim an acid-resistant shell. Choose Nutricost when current price is the deciding factor among the 100 mg options. Skip it when you want a larger bottle, a branded SAG ingredient, or more detailed lot-level documentation.
6. Designs for Health SAG Synergy – Best SAG and NAC Combination
Designs for Health S-Acetyl Glutathione Synergy 60 Capsules
SAG and NAC CombinationA practitioner-style combination for people who deliberately want SAG, NAC, and P5P in one serving.
Pros
- 200 mg SAG per two capsules
- Adds 1,000 mg NAC and 10 mg active-form B6
- Transparent combination formula
Cons
- Only 30 servings per bottle
- NAC and B6 are unnecessary for shoppers seeking SAG alone
Two capsules supply 200 mg S-acetyl glutathione, 1,000 mg NAC, and 10 mg vitamin B6 as pyridoxal-5-phosphate. The 60-capsule bottle holds 30 servings. That makes Designs for Health a combination product, not a direct value comparison with 100 mg single-ingredient capsules.
NAC is a cysteine donor the body can use in glutathione synthesis, but NAC milligrams are not additional SAG milligrams. The B6 also counts toward total supplemental intake. Choose this product only when all three actives fit the intended routine. Skip it if you already take NAC or B6, take medications that may interact with NAC, or want the cleanest way to assess a single SAG ingredient.
7. XYMOGEN S-Acetyl Glutathione – Best Practitioner-Style Acid-Resistant Formula
XYMOGEN S-Acetyl Glutathione 60 Acid-Resistant Capsules
Practitioner-Style FormulaA clearly labeled acid-resistant product with 200 mg per two capsules and extensive excluded-ingredient disclosures.
Pros
- 200 mg SAG per two capsules
- Acid-resistant vegetarian capsules
- Broad allergen exclusions listed
Cons
- Only 30 two-capsule servings
- Premium price per serving
XYMOGEN lists 200 mg S-acetyl glutathione in two acid-resistant vegetarian capsules. The 60-count bottle therefore has 30 full servings. Its current label excludes wheat, gluten, corn, yeast, soy, animal and dairy ingredients, fish, shellfish, peanuts, tree nuts, egg, sesame, GMO-derived ingredients, and artificial colors, sweeteners, and preservatives.
The dosage directions allow one or two capsules one or two times daily under healthcare guidance, which makes the bottle length variable. At the labeled two-capsule facts-panel serving, it is a one-month product and carries a practitioner-brand premium. Choose it for the acid-resistant shell and exclusion list. Skip it if value per 100 mg matters more; Jarrow and Nutricost are simpler comparisons.
8. SuperSmart S-Acetyl Glutathione – Best Three-Capsule 300 mg Serving
SuperSmart S-Acetyl Glutathione 300 mg 90 Capsules
Three-Capsule 300 mg ServingA 300 mg daily amount divided across three capsules for shoppers who prefer a splitable serving.
Pros
- 300 mg SAG per three capsules
- 90 vegetarian capsules
- Acacia gum and rice bran are the listed excipients
Cons
- Three capsules for one serving
- Only 30 servings per bottle
SuperSmart uses three 100 mg capsules to make its 300 mg serving. The 90-count bottle supplies 30 full servings, and the listed supporting ingredients are acacia gum and white rice bran. Dividing the dose across three capsules is useful for someone who prefers 100 mg increments rather than TerraForm’s single 300 mg capsule.
The tradeoff is pill count and cost: three capsules produce the same labeled SAG amount that TerraForm puts in one. The brand’s page also makes aggressive health claims that go beyond the limited SAG-specific human evidence, so evaluate the label rather than the promises. Skip SuperSmart if convenience is the priority; choose it when dose divisibility matters.
9. MaxLife Naturals S-Acetyl Glutathione – Alternative 300 mg Formula
MaxLife Naturals S-Acetyl Glutathione 300 mg 60 Capsules
Alternative 300 mg FormulaA 300 mg acid-resistant alternative whose serving count should be confirmed on the delivered label.
Pros
- 300 mg SAG serving
- Acid-resistant capsules
- 60 capsules per bottle
Cons
- Official page does not clearly state capsules per serving
- Less detailed facts information than TerraForm
MaxLife Naturals lists a 300 mg S-acetyl glutathione serving, 60 capsules, acid-resistant delivery, U.S. manufacturing in a GMP-certified facility, and batch testing. That is a competitive outline, but its official page does not clearly display the serving size or complete Supplement Facts panel in text.
Do not assume that 60 capsules always means 60 servings. Check the delivered facts panel for capsules per serving and the exact other ingredients before calculating value. TerraForm ranks higher because it clearly identifies one capsule as a 300 mg serving. Choose MaxLife when its current listing and bottle confirm that same math at a better price. Otherwise, the clearer labels are easier to defend.
10. Tesseract SafeCell – Proprietary Delivery Complex
Tesseract SafeCell S-Acetyl Glutathione Complex 60 Capsules
Proprietary Delivery ComplexA one-capsule delivery complex that ranks last because its 300 mg number is not a transparent pure-SAG dose.
Pros
- 300 mg complex per capsule
- 60 one-capsule servings
- Hypoallergenic positioning
Cons
- Does not disclose pure SAG amount inside the complex
- Premium price rests on proprietary delivery claims
SafeCell lists 300 mg of an S-acetyl glutathione proprietary complex per capsule and 60 capsules per bottle. The complex incorporates the brand’s CyLoc and DexKey delivery materials. This is the key distinction: the 300 mg line describes the complete complex, not a separately disclosed 300 mg of pure SAG.
That opacity makes a cost-per-milligram comparison impossible. Proprietary delivery language also does not replace direct clinical evidence on the finished product. Choose SafeCell only when a healthcare practitioner specifically prefers this formulation and can explain why the complex fits the goal. Skip it if transparent SAG dose is the priority; every product ranked above it states a clearer active amount.
How to Choose an S-Acetyl Glutathione Supplement
Confirm the exact form
Look for S-acetyl glutathione, S-acetyl-L-glutathione, SAG, or the branded ingredient Emothion on the Supplement Facts panel. Reduced glutathione, liposomal glutathione, and NAC belong to the broader glutathione category, but they are not the same ingredient. A mixed list can make a product appear more comprehensive while hiding the exact amount you intended to buy.
Separate active dose from delivery-complex weight
Jarrow’s 100 mg line is 100 mg SAG. TerraForm’s 300 mg line is 300 mg SAG. SafeCell’s 300 mg line is a proprietary complex that includes SAG and delivery materials without separating their weights. Those numbers should not be treated as equal. The most defensible label names the active form and its amount independently.
Do the serving math
Pure TheraPro Rx provides 120 one-capsule servings. SuperSmart’s 90 capsules make 30 three-capsule servings. Designs for Health and XYMOGEN each turn 60 capsules into 30 two-capsule servings. Compare price per labeled serving and price per disclosed 100 mg, not just bottle price or capsule count.
Keep expectations tied to the evidence
Ordinary oral glutathione research is mixed. A six-month randomized trial found increases in glutathione stores at 250 and 1,000 mg per day, while an earlier four-week trial using 1,000 mg per day found no significant change in glutathione status or oxidative-stress biomarkers.2, 3 Neither trial establishes that retail SAG products improve a symptom, disease, skin color, or sports performance. The SAG-specific human evidence is much thinner.
Review safety and medication context
The EFSA safety opinion supports up to 300 mg SAG daily for adults under its stated conditions and excludes pregnancy and lactation.1 That opinion is not individualized medical advice. People taking prescription drugs, managing chronic conditions, preparing for surgery, or considering a combination product with NAC should discuss the exact formula with a clinician or pharmacist. Stop use and seek advice if a supplement causes a concerning reaction.
Frequently Asked Questions
Is S-acetyl glutathione better than liposomal glutathione?
There is not enough direct comparative human evidence to name a universal winner. The 2026 EFSA review found that a high single SAG dose produced a somewhat different glutathione exposure pattern from ordinary GSH, but variability was high and the study had important design limitations. Choose between forms based on the exact label, clinician guidance, dose transparency, and cost rather than assuming one delivery claim guarantees a better result.
How much S-acetyl glutathione should I take?
Retail labels commonly provide 100 to 300 mg per serving. The EFSA opinion concluded that 300 mg per day was safe for adults under its proposed use conditions, excluding pregnancy and lactation, but it did not establish an effective dose for a health outcome. Follow the exact label and professional advice rather than combining products to chase a larger number.
Is S-acetyl glutathione the same as NAC?
No. SAG is an acetylated form of glutathione. NAC is a cysteine donor that the body can use when making glutathione. Designs for Health includes both, while the single-ingredient products do not. NAC has its own precautions and medication considerations, so a combined formula should be evaluated as a combination rather than as a stronger SAG serving. Our best NAC supplements roundup compares that ingredient on its own.
Can S-acetyl glutathione lighten skin?
No SAG product in this roundup should be treated as a skin-lightening drug. Some studies have examined ordinary oral glutathione and skin measurements, but that does not validate claims for these exact products, long-term cosmetic use, or a predictable result. Products promising dramatic whitening or rapid pigment changes deserve skepticism and medical review.
What does acid-resistant mean on the label?
An acid-resistant capsule is designed to delay opening in the stomach. TerraForm, Pure TheraPro Rx, XYMOGEN, and MaxLife use that positioning. It is a delivery feature, not proof that the finished product produces a better clinical outcome. Dose clarity, serving count, and credible quality documentation remain important.
Bottom Line
Jarrow S-Acetyl L-Glutathione is the strongest all-around choice because its 100 mg one-tablet serving is easy to understand and the bottle supplies 60 servings. TerraForm is the clearest 300 mg one-capsule option, Pure TheraPro Rx has the longest simple-formula supply, and Double Wood publishes the most useful lot-level testing. Choose a transparent active dose before paying extra for delivery claims, and keep expectations modest given the limited SAG-specific human evidence.
Sources
- European Food Safety Authority. Safety of S-acetyl glutathione as a novel food pursuant to Regulation (EU) 2015/2283. EFSA Journal. 2026.
- Richie JP Jr, et al. Randomized controlled trial of oral glutathione supplementation on body stores of glutathione. European Journal of Nutrition. 2015.
- Allen J, Bradley RD. Effects of oral glutathione supplementation on systemic oxidative stress biomarkers in human volunteers. Journal of Alternative and Complementary Medicine. 2011.
