Collagen (Type I, II, III) vs Quercetin

Mechanism

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.

Standard Dosing

10-20g hydrolyzed collagen peptides daily

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.

Cycle Duration

ongoing (minimum 8-12 weeks for visible results)

Side Effects

• Mild bloating
• GI discomfort
• Unpleasant taste
• Rare: calcium elevation (if calcium-containing marine source)
• Feeling of fullness

Contraindications

• Fish/shellfish allergy (if marine-sourced)
• Phenylketonuria (collagen contains phenylalanine)
• Histamine intolerance (bone broth collagen may be high in histamine)

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Mechanism

Quercetin is a flavonoid that inhibits mast cell degranulation and histamine release, functions as a potent senolytic (selectively clearing senescent cells) when combined with dasatinib or fisetin, and activates AMPK and SIRT1 pathways. It inhibits PI3K/Akt/mTOR signaling, suppresses NF-kB, and modulates JAK-STAT inflammatory cascades. As a zinc ionophore, it facilitates zinc entry into cells, which may inhibit viral RNA-dependent RNA polymerase.

Standard Dosing

500-1000mg daily

Timing

With meals for absorption. For senolytic effect: 3-day pulse monthly on empty stomach.

Cycle Duration

ongoing for general use; pulsed monthly for senolytic protocols

Side Effects

• Headache
• Mild GI upset
• Tingling extremities at high doses
• Rare: kidney toxicity at very high doses

Contraindications

• Pregnancy/lactation at high doses
• Concurrent cyclosporine therapy

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