Calcium D-Glucarate vs Glycine + NAC (GlyNAC)

Mechanism

Calcium D-glucarate is the calcium salt of D-glucaric acid, which is metabolized to D-glucaro-1,4-lactone (the active metabolite). This lactone inhibits beta-glucuronidase, the bacterial enzyme in the gut that deconjugates (cleaves) glucuronide conjugates from Phase II detoxification. By inhibiting beta-glucuronidase, calcium D-glucarate prevents the reabsorption (enterohepatic recirculation) of estrogen, environmental toxins, and carcinogens that were already conjugated for excretion. This effectively enhances the elimination of glucuronidated compounds, including estrogen metabolites, bilirubin, and xenobiotics.

Standard Dosing

500-1500mg daily

Timing

With meals, split 2-3x/day for sustained beta-glucuronidase inhibition.

Cycle Duration

ongoing or cycle with DIM protocol

Side Effects

• GI discomfort
• Loose stools
• Generally very well tolerated

Contraindications

• Pregnancy/lactation (estrogen clearance effects)
• Concurrent medications with narrow therapeutic index that undergo glucuronidation

Best Stacking Partners

Mechanism

Combination that restores glutathione synthesis. Age-related glutathione deficiency is driven by glycine and cysteine precursor depletion, not enzyme dysfunction. GlyNAC corrects oxidative stress, mitochondrial dysfunction, inflammation, and insulin resistance in older adults.

Contraindications

• Active stomach ulcer (NAC)
• Asthma (NAC may cause bronchospasm in rare cases)