Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Collagen (Type I, II, III) | DHEA (Dehydroepiandrosterone) | |
|---|---|---|
| Category | Supplements | Supplements |
| Standard Dose | 10-20g hydrolyzed collagen peptides daily | 25-50mg daily (men); 10-25mg daily (women) |
| Timing | Any time; often added to morning coffee or post-workout shake. For joint support, take with vitamin C 30-60 min before exercise. Type II collagen (undenatured, UC-II) taken on empty stomach. | Morning (mimics natural circadian peak). With food. |
| Cycle Duration | ongoing (minimum 8-12 weeks for visible results) | Ongoing under supervision with regular blood monitoring (DHEA-S, testosterone, estradiol, PSA in men) |
| Evidence Level | moderate_human | moderate_human |
Hydrolyzed collagen peptides are absorbed as di- and tripeptides (primarily hydroxyproline-proline and hydroxyproline-glycine) via PepT1 transporters in the small intestine. These bioactive peptides accumulate in skin, cartilage, and bone where they stimulate fibroblast proliferation and extracellular matrix synthesis by upregulating collagen gene expression (COL1A1, COL3A1). They also inhibit MMP (matrix metalloproteinase) activity that degrades existing collagen, and stimulate hyaluronic acid production by dermal fibroblasts.
10-20g hydrolyzed collagen peptides daily
Any time; often added to morning coffee or post-workout shake. For joint support, take with vitamin C 30-60 min before exercise. Type II collagen (undenatured, UC-II) taken on empty stomach.
ongoing (minimum 8-12 weeks for visible results)
DHEA is the most abundant circulating steroid hormone, produced primarily by the adrenal zona reticularis. It serves as a precursor for both androgens (testosterone, DHT via 3beta-HSD and 17beta-HSD) and estrogens (estradiol, estrone via aromatase). DHEA-S (sulfated form) acts as a neurosteroid, positively modulating NMDA receptors and antagonizing GABA-A receptors (cognitive enhancement/alertness). It also modulates immune function (enhances Th1 immunity, IL-2 production), supports bone mineral density via estrogenic metabolites, enhances insulin sensitivity via PPAR-alpha activation, and opposes cortisol's catabolic effects (DHEA:cortisol ratio is a stress/aging biomarker).
25-50mg daily (men); 10-25mg daily (women)
Morning (mimics natural circadian peak). With food.
Ongoing under supervision with regular blood monitoring (DHEA-S, testosterone, estradiol, PSA in men)
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