Collagen

What Is Collagen?

Collagen is the most abundant protein in your body (~30% of total protein). It provides structure to skin, bones, tendons, ligaments, and cartilage. Your body produces it naturally, but production declines ~1% per year after age 20.

Types of Collagen:

How Supplements Work:

1. You consume collagen peptides (hydrolyzed collagen)
2. Digestion breaks them into amino acids and small peptides
3. These peptides may signal fibroblasts to produce more collagen
4. Some peptides (like prolyl-hydroxyproline) reach target tissues intact

Key Amino Acids:

• Glycine (~33% of collagen)
• Proline (~10%)
• Hydroxyproline (~10%)
• These are "conditionally essential," meaning your body makes them but may not make enough

The Signaling Theory:

Collagen peptides don't just provide building blocks. They may also act as signals. When your body detects collagen fragments in the bloodstream, it may interpret this as tissue damage and upregulate collagen synthesis.

Bioavailability:

• Hydrolyzed collagen (peptides): ~90% absorbed
• Gelatin: Lower absorption, requires more digestion
• Whole collagen: Poor absorption

Why Vitamin C Matters:

Vitamin C is essential for collagen synthesis (hydroxylation of proline and lysine). Without adequate vitamin C, your body can't properly form collagen regardless of supplementation.

Standard Dosing:

• Skin benefits: 2.5-10g daily
• Joint health: 10-15g daily
• Athletic/connective tissue: 15-20g daily
• Most studies use 5-15g range

Timing:

• General use: Any time, with or without food
• For tendons/ligaments: 30-60 minutes before exercise with vitamin C
• Consistency matters more than timing

Duration:

• Skin improvements: 4-8 weeks minimum
• Joint benefits: 3-6 months for full effect
• Connective tissue: Ongoing during training/recovery

The Tendon Protocol (Keith Baar research):

1. Take 15g collagen with 50mg vitamin C
2. Wait 30-60 minutes
3. Perform 5-10 minutes of targeted loading (for the specific tendon)
4. This creates a "window" of increased collagen synthesis
5. Repeat 2-3x daily for injury rehab

Optimizing Absorption:

• Take with vitamin C (50-100mg)
• Hydrolyzed peptides absorb best
• Empty stomach may improve absorption slightly
• Avoid taking with high-protein meals (competition for absorption)

Forms:

• Powder: Most versatile, easy to dose
• Capsules: Convenient but need many for effective dose
• Liquid: Pre-mixed, often overpriced
• Bone broth: Natural source, variable collagen content

Safety Profile:

Collagen is generally very safe. It's a food-derived protein with minimal risks.

Potential Side Effects:

• Mild GI upset (rare)
• Feeling of fullness
• Bad taste (some marine collagens)
• Allergic reactions (rare, usually to source)

Allergen Concerns:

• Marine collagen: Fish/shellfish allergy risk
• Bovine collagen: Beef allergy (rare)
• Avoid if allergic to the source animal

Quality Concerns:

• Heavy metal contamination (especially marine)
• Undisclosed sources
• Misleading "type" claims
• Look for third-party testing

Drug Interactions:

• None significant known
• May theoretically affect calcium absorption (minimal concern)

Who Should Be Cautious:

• Those with fish/shellfish allergies (marine collagen)
• People with histamine intolerance (some react to collagen)
• Those with kidney disease (high protein load, consult doctor)

Overclaims to Ignore:

• "Replaces lost collagen directly"
• "Erases wrinkles"
• "Reverses aging"
• Most marketing overstates the effects

Risk Level: Very low for most people

Best Candidates:

• Adults 30+ noticing skin changes
• People with joint pain or osteoarthritis
• Athletes with tendon/ligament issues
• Those recovering from connective tissue injuries
• People wanting to support skin health proactively

Particularly Useful For:

• Runners, climbers, and athletes with repetitive stress
• Post-menopausal women (accelerated collagen loss)
• Those with mild joint discomfort
• People doing physical therapy for tendon injuries

May Not Be Worth It For:

• Young people with no specific concerns
• Those expecting dramatic visible changes
• People already eating collagen-rich foods (bone broth, etc.)
• Anyone looking for a quick fix

Dietary Context:

If you regularly consume bone broth, chicken skin, fish skin, or gelatin-rich foods, you may already get adequate collagen precursors. Supplements are most useful for those who don't eat these foods.

Skin Metrics:

Joint Metrics:

Athletic/Tendon:

• Pain during specific movements
• Load tolerance (weight, reps)
• Recovery time between sessions

How to Track Skin Changes:

1. Take baseline photos (consistent lighting, no makeup)
2. Note baseline hydration feel
3. Repeat photos monthly
4. Compare at 8 and 12 weeks

Signs It's Working:

• Skin feels more hydrated
• Nails are stronger, less brittle
• Reduced joint stiffness in morning
• Less pain during/after exercise
• Hair may feel thicker (anecdotal)

Signs to Reassess:

• No changes after 12 weeks
• GI discomfort
• Any allergic symptoms

Recommended:

• Vital Proteins Original - Most popular brand, well-tested, bovine source. The default choice.

• Great Lakes Collagen - Trusted brand, grass-fed bovine, good value.

• Sports Research Marine Collagen - Wild-caught fish, good for those avoiding beef.

• Momentous Collagen - Used by pro sports teams, includes vitamin C.

• Bulk Supplements Collagen - Best value, no frills.

Marine vs Bovine:

• Marine: Type I dominant, possibly better for skin, fish taste possible
• Bovine: Type I and III, more versatile, usually cheaper

What to Look For:

• Hydrolyzed collagen peptides (not gelatin)
• Third-party tested for heavy metals
• Single source (not mystery blends)
• No unnecessary additives

What to Avoid:

• Products with excessive added ingredients
• Unclear sourcing
• No third-party testing
• Liquid collagens (usually overpriced, stability concerns)

Budget ($15-25/month):

• Bulk Supplements Collagen - Best value per gram
• Great Lakes Collagen - Solid budget bovine option

Mid-Range ($25-40/month):

• Vital Proteins - Popular, well-tested
• Sports Research Collagen - Good marine option
• Anthony's Collagen - Clean ingredients

Premium ($40-60/month):

• Momentous Collagen - Used by pro athletes
• Further Food Collagen - Multi-type formula

Cost Per Serving (10g):

• Budget: $0.30-0.50
• Mid-range: $0.50-1.00
• Premium: $1.00-1.50

Value Assessment:

Collagen is moderately priced. You don't need the most expensive option; the budget brands work fine if third-party tested. The key is consistent daily use, so factor in 3+ months of supply.

Key Researchers:

• Keith Baar, PhD - UC Davis, leading researcher on collagen and tendon health. His work on the "collagen + vitamin C + exercise" protocol is foundational.

Practitioners:

• Andrew Huberman, PhD - Covers collagen protocols for tendon/ligament support

Key Studies:

• Baar's research showing collagen + vitamin C before exercise increases collagen synthesis
• Multiple RCTs showing skin hydration and elasticity improvements
• Osteoarthritis studies showing pain reduction

What Users Report:

Positive:

• "Skin feels more hydrated after ~6 weeks"
• "Joint pain during runs decreased noticeably"
• "Nails are stronger, don't break as easily"
• "Helped my tennis elbow when combined with PT"
• "Hair seems thicker but hard to measure"

Mixed/Negative:

• "Took 3 months to notice anything"
• "Expensive for what it is"
• "Can't tell if it's doing anything for skin"
• "Marine collagen tastes fishy"
• "Didn't help my knee pain"

Common Themes:

• Benefits take time (8-12 weeks minimum)
• Joint benefits more noticeable than skin
• Individual response varies significantly
• Consistency is key

Reddit Communities:

• r/SkincareAddiction - Skin-focused discussions
• r/Supplements - General supplement talk
• r/30PlusSkinCare - Mature skin focus

Essential Pairing:

• Vitamin C (50-100mg) - Required for collagen synthesis. Always take together.

Skin Stack:

• Collagen (5-10g)
• Vitamin C
• Hyaluronic acid (topical or oral)
• Red Light Therapy - May enhance collagen production

Joint Stack:

• Collagen (10-15g)
• Vitamin C
• Omega-3s - Anti-inflammatory
• Glucosamine/chondroitin (if desired)

Tendon/Athletic Stack (Keith Baar Protocol):

• Collagen 15g + Vitamin C 50mg
• 30-60 minutes before targeted exercise
• 5-10 minutes of loading exercises
• Repeat 2-3x daily for rehab

Recovery Stack:

• Collagen (supports tissue repair)
• Glycine - Sleep + additional collagen support
• Magnesium - Muscle relaxation, sleep

Timing Considerations:

• For skin: Any time daily
• For tendons: Before exercise/PT
• For joints: Morning or split doses
• Avoid taking with large protein meals (competition)

What NOT to Pair:

• High-protein meals at same time (may reduce absorption)
• No specific negative interactions known