Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Calcium D-Glucarate | Saw Palmetto (Serenoa repens) | |
|---|---|---|
| Category | Supplements | Supplements |
| Standard Dose | 500-1500mg daily | 320mg daily (standardized to 85-95% fatty acids and sterols) |
| Timing | With meals, split 2-3x/day for sustained beta-glucuronidase inhibition. | With food (fat-soluble lipophilic extract). Morning or evening. |
| Cycle Duration | ongoing or cycle with DIM protocol | Minimum 3 months to assess response; ongoing for maintenance |
| Evidence Level | moderate_human | moderate_human |
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.
500-1500mg daily
With meals, split 2-3x/day for sustained beta-glucuronidase inhibition.
ongoing or cycle with DIM protocol
Saw palmetto berry extract contains fatty acids (lauric acid, oleic acid, myristic acid) and phytosterols (beta-sitosterol) that inhibit both isoforms of 5-alpha-reductase (types I and II), reducing conversion of testosterone to dihydrotestosterone (DHT). It also exhibits anti-androgenic activity by competing with DHT at androgen receptor binding sites. Additional mechanisms include: inhibition of cyclooxygenase and 5-lipoxygenase (anti-inflammatory in prostate tissue), induction of apoptosis in prostate epithelial cells, and relaxation of bladder smooth muscle via alpha-1 adrenergic receptor antagonism.
320mg daily (standardized to 85-95% fatty acids and sterols)
With food (fat-soluble lipophilic extract). Morning or evening.
Minimum 3 months to assess response; ongoing for maintenance
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