3 forms with distinct profile · liposomal is pure marketing · cheap HPMC capsule wins on price · powder for >2 g doses.
600 mg crystalline NAC per capsule
Best for
Ideal use: 600-1,800 mg/day doses · chronic maintenance · tight budget.
Advantages
Bioavailability ~10% (similar across all oral forms). Economical (~12 €/month at 1,200 mg/day). Better digestive tolerance than powder. Form used in 90% of RCTs.
Disadvantages
For doses >1,800 mg requires 3-6 capsules/day (cumbersome).
Pure NAC · 1 g per scoop
Best for
Ideal use: GlyNAC stack, doses >2 g/day, athletes with aggressive repletion.
Advantages
Economical for high doses (GlyNAC 7-10 g/day). Mixable with citrus liquids to mask sulfur taste.
Disadvantages
Very strong sulfurous taste · requires strong lemony citric juice. Hygroscopic · airtight closure mandatory.
Quicksilver, Designs for Health
Best for
Ideal use (questionable): subjects with severe digestive problems on standard capsule. Pro tip: cheap capsule + fatty food better cost-benefit.
Advantages
Marketing claim of +200% bioavailability · limited clinical evidence. Less sulfurous taste.
Disadvantages
Expensive (~50-80 €/month). Lack of head-to-head comparative RCTs. Marketing claims without better clinical endpoint than HPMC capsule.
Ideal use: 600-1,800 mg/day doses · chronic maintenance · tight budget.
Ideal use: GlyNAC stack, doses >2 g/day, athletes with aggressive repletion.
Ideal use (questionable): subjects with severe digestive problems on standard capsule. Pro tip: cheap capsule + fatty food better cost-benefit.
3 forms with distinct profile · liposomal is pure marketing · cheap HPMC capsule wins on price · powder for >2 g doses.