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L-Proline L-Lysine 275 mg / 275 mg

Source Naturals
4.7
★ ★ ★ ★ ★
(4493 ratings)
Vitamin C 1147 mg
Hawthorn 100 mg
Product Image
Score95

A high-potency collagen support formula combining amino acids with a very large dose of buffered vitamin C.

How scoring works
Quantity:120 Tablet(s) • (30 servings)
Goals:
General Health
Immunity
Skin Health
Anti-Inflammatory Support

Score 95

A high-potency collagen support formula combining amino acids with a very large dose of buffered vitamin C.

How scoring works
$15.63($0.52 per serving)
iHerb
$ 15.78
Pure Formulas
$ 16.45
iHerb
$ 15.78
Vitacost
$ 15.63
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Analysis

It provides an exceptionally high dose of buffered vitamin C (over 2 grams) alongside the amino acids L-proline and L-lysine. This combination is essential for the body to synthesize and repair collagen, which keeps your tissues strong and flexible.

The formula is rounded out with grape seed and hawthorn extracts to provide extra antioxidant support for your circulation. It is a very potent and technical formula for foundational structural health.

Pros

  • Huge dose of Vitamin C for tissue saturation
  • Features critical amino acids for collagen
  • Buffered mineral forms are gentler on the gut
  • Includes grape seed for vascular health

Cons

  • Extremely high dose of C may cause loose stools in some
  • Requires four tablets per day
  • Hawthorn dose is relatively minor

Warnings

  • The high amount of vitamin C may exceed daily needs; monitor for digestive changes
  • Contains 20 calories and 2g of carbohydrates per serving

Nutrient quality

92 Highest impact

Buffered calcium and magnesium ascorbates provide a high-quality, non-acidic source of vitamin C for tissue support. Meaningful doses of L-proline and L-lysine enhance the formula's effectiveness for structural collagen goals.

Ingredient transparency

98 Highest impact

Labels clearly disclose the precise amounts for the high-potency vitamins and amino acids in the formula. High transparency regarding the mineral ascorbate forms allows for accurate assessment of the antioxidant quality.

Customer satisfaction

96 Highest impact

Strong average ratings and a massive review history reflect exceptional consumer confidence and reliability. Feedback consistently highlights satisfaction with the blend's impact on skin density and structural wellness.

Value for money

94 Highest impact

A reasonable cost per serving for high-potency buffered vitamins and essential amino acids makes this formula an excellent value. The inclusion of grape seed extract and hawthorn berry justifies the overall unit price.

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Goals

General Health
Impact
Highest effect
A+ Goal FitA+ Strength of SupportB- CoverageA+ Formula Quality

Buffered Vitamin C, combined with L-lysine and L-proline, provides critical support for collagen synthesis and foundational tissue health. These ingredients contribute to systemic resilience by supporting the structural integrity of skin, bones, and blood vessels.

The high dose of 2294 mg of Vitamin C from mineral ascorbates ensures tissue saturation while being gentle on the digestive system. By utilizing buffered forms and synergistic amino acids, the formulation addresses several key pillars of general health effectively.

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Immunity
Impact
Highest effect
A Goal FitA+ Strength of SupportA- CoverageA Formula Quality

Vitamin C and L-lysine support collagen-based barriers and viral defense mechanisms.

A 2294 mg dose of Vitamin C provides high-potency support for oxidative stress control and cellular integrity.

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Skin Health
Impact
Highest effect
A+ Goal FitA Strength of SupportB+ CoverageA+ Formula Quality

L-Proline, L-Lysine, and high-dose Vitamin C combine to provide robust support for the structural framework of the skin. These ingredients are essential for the production of collagen, contributing to improved skin density and elasticity.

The inclusion of grape seed and hawthorn berry extracts further enhances the formula's antioxidant capacity for photo-protection. This combination appears well aligned for individuals seeking targeted support for dermal structure and repair.

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Anti-Inflammatory Support
Impact
Highest effect
A Goal FitA+ Strength of SupportB+ CoverageA Formula Quality

This formula delivers a high dose of buffered Vitamin C alongside amino acids and botanical extracts for systemic and tissue support. The use of calcium and magnesium ascorbates enhances gastric tolerance and bioavailability for high-dose supplementation.

Providing over 2000 mg of Vitamin C per serving ensures robust antioxidant quenching of inflammatory processes. While synergistic for tissue health, the extremely high Vitamin C dose may exceed the threshold for efficient intestinal absorption in a single serving.

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Vision Support
Impact
Moderate effect
D Goal FitA- Strength of SupportD CoverageC- Formula Quality

Foundational antioxidant defense is provide by the high-potency dose of buffered vitamin C and grape seed extract. These ingredients may contribute to protecting the capillaries of the eyes from oxidative damage.

The primary focus on amino acids makes this formula less suited for targeted ocular support compared to products containing macular pigments.

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Ingredients

IngredientAmount per serving
Calories
20 Calorie(s)
Total Carbohydrates
2 Gram(s)
Vitamin C (Calcium Ascorbate, Magnesium Ascorbate)
 1147 mg
Calcium (Calcium Ascorbate)
 66 mg
Magnesium (Magnesium Ascorbate)
 46 mg
L-Lysine
1.1 Gram(s)
L-Proline
1.1 Gram(s)
Proanthodyn (Grape Seed Extract)
 100 mg
Hawthorn Berry Extract
100 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free Vegetarian
Report overview
Vitamin C (Calcium Ascorbate, Magnesium Ascorbate) · 1147 mg OverallScore63
B+ Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyF Value
This specialized amino acid formula includes over 2000 mg of Vitamin C from buffered mineral ascorbates. It is designed for tissue support but provides a higher dose of Vitamin C than the body can optimally utilize at once.
View ingredientView products
Hawthorn · 100 mg OverallScore43
D+ Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyB+ Value
This L-Proline and L-Lysine blend includes a low dose of hawthorn berry extract as a secondary ingredient. It does not provide enough hawthorn to meet heart health goals.
View ingredientView products
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