---
product_id: 14712161
title: "Source Naturals L-Proline & L-Lysine, 550mg - 120 Tablets"
brand: "source naturals"
price: "$22.87"
currency: USD
in_stock: null
reviews_count: 8
category: "Source Naturals"
url: https://www.desertcart.us/products/14712161-source-naturals-l-proline-and-l-lysine-550mg-120-tablets
store_origin: US
region: United States of America
---

# Vegetarian-friendly formula 550 mg potent amino acids Supports collagen synthesis Source Naturals L-Proline & L-Lysine, 550mg - 120 Tablets

**Brand:** source naturals
**Price:** $22.87
**Availability:** ❌ Out of Stock

## Summary

> 💪 Unlock your body's natural repair system with every tablet!

## Quick Answers

- **What is this?** Source Naturals L-Proline & L-Lysine, 550mg - 120 Tablets by source naturals
- **How much does it cost?** $22.87 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/14712161-source-naturals-l-proline-and-l-lysine-550mg-120-tablets)

## Best For

- source naturals enthusiasts

## Why This Product

- Trusted source naturals brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Clean & Pure:** Free from gluten, soy, dairy, yeast, and artificial additives—because your wellness deserves the best.
- • **Cold Sore Defense:** Real users report fewer cold sores—stay confidently unstoppable all year round.
- • **Clinically Trusted:** Backed by 40+ years of science and cGMP manufacturing standards in the USA.
- • **Vegetarian Verified:** Perfect for plant-forward lifestyles without compromising on essential amino acid intake.
- • **Essential Amino Power:** 550 mg of L-Lysine & L-Proline fuel your body's collagen production for lasting vascular health.

## Overview

Source Naturals Proline & Lysine delivers 550 mg of essential amino acids per tablet, supporting collagen synthesis critical for arterial health and skin repair. Vegetarian-friendly and free from common allergens, this supplement is manufactured under strict FDA cGMP guidelines in the USA. Trusted for over 40 years, it also helps reduce cold sore outbreaks, making it a holistic addition to your daily wellness routine.

## Description

Buy Source Naturals Proline & Lysine, 550 mg - 120 Tablets on desertcart.com ✓ FREE SHIPPING on qualified orders

Review: Improve clogged arterite! - Product on US market years ago faded out - Vitacore. The US proponent was Dr. Linus Pauling who passed on. He had a business partner in Europe who still sells Vitacore. Here in US you can get same thing from desertcart or Vitamin Shoppee - discount catalog. Proline + Lysine pills,- BUT HAS 1000MG of Vit C. See back label. SAME AS VITACORE. It was also originally available as orange powder drink . US Patented and tested as OK and works. Think of the water pot on stove with lime caked up . Add water and vinegar without stirring. After a while the pot is cleaner. The Proline + Lysine erodes away very slowly the Plaque build up in arteries from Cholesterol and fat. The autonomic process in body has no personal control. It constantly heals and adds collagen to arteries . If not enough collagen, process uses fat and cholesterol on surface of arteries. Poor diet. Takes a few weeks to feel better. A start of clearing on medial scan within 3 months. Full process takes a year constantly on pills. The Vit C allows body to MAKE collagen as well as from the food. So now you know. There was a movie years ago with Harrison Ford that was a put down on such a product. Producers of " The Fugitive" made it out as non worthy - they called it Provassic.
Review: Goodbye cold sores! - Since using this product I don't get cold sores anymore. It works really good at preventing them!

## Features

- L-Lysine is one of 9 essential amino acids that cannot be made in the body. It is the basic raw material for carnitine synthesis. L-Proline can be made in the body, but low-protein/vegetarian diets may not always promote optimal L-proline production. L-Lysine and L-proline amino acids are the precursors of hydroxylysine (HL), and hydroxyproline (HP), two constituents of collagen.
- Suggested Use: 2 to 4 tablets daily with meals.
- Suitable for vegetarians. Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, salt, preservatives, or artificial color, flavor or fragrance.
- Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support everyone’s potential to enjoy optimal health.
- Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration. (FDA)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B0014GW9XA |
| Best Sellers Rank | #50,895 in Health & Household ( See Top 100 in Health & Household ) #62 in L-Lysine Nutritional Supplements #3,090 in Sales & Deals |
| Customer Reviews | 4.2 4.2 out of 5 stars (329) |
| Date First Available  | January 8, 2004 |
| Is Discontinued By Manufacturer  | No |
| Item model number  | SN0758 |
| Manufacturer  | Source Naturals |
| Product Dimensions  | 2.51 x 2.51 x 4.6 inches; 0.46 ounces |

## Product Details

- **Brand:** Source Naturals
- **Diet Type:** Vegetarian
- **Flavor:** Unflavored
- **Item Form:** Tablet
- **Item Weight:** 0.03 Pounds
- **Item dimensions L x W x H:** 2.51 x 2.51 x 4.6 inches
- **Primary Supplement Type:** L-Lysine, l-Proline
- **Product Benefits:** Energy Management
- **Special Ingredients:** L-Lysine, L-Proline
- **Unit Count:** 120.0 Count

## Images

![Source Naturals L-Proline & L-Lysine, 550mg - 120 Tablets - Image 1](https://m.media-amazon.com/images/I/61gbQ5HqutL.jpg)

## Questions & Answers

**Q: Where are they made**
A: Please ask the manufacturer.

**Q: Why does the label say 550mg, but the ingredient facts says 1.1 gram?**
A: This product contains the same ingredients and quantity  as the famous earlier Patented one called Vitacore . The Source Naturals bottle has same wt tablets each, so as 4 tablets contain 1 gram Vitamin C and ALSO 1.1gm Proline and also 1.1Gm of Lysine, and other minerals as listed on bottle together. The quantity is correct as per the earlier version Vitacore. The LABEL reflects the total only of Proline + Lysine of 2200mg  divided by 4 tablets = 550mg. Company is eliminating legal matters as with the earlier Vitacore, and The Vit C is only on back label.

**Q: what color are these? The ones I just got had a broken seal and they are speckled brownish.**
A: "Speckled brownish" is an accurate description for the natural color of these Proline-Lysine tablets.

**Q: Does this help improve your skin?  Thanks!!**
A: I didn't notice a difference in my skin. I mainly use it for improved circulation in my legs.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Improve clogged arterite!
*by R***. on February 26, 2023*

Product on US market years ago faded out - Vitacore. The US proponent was Dr. Linus Pauling who passed on. He had a business partner in Europe who still sells Vitacore. Here in US you can get same thing from Amazon or Vitamin Shoppee - discount catalog. Proline + Lysine pills,- BUT HAS 1000MG of Vit C. See back label. SAME AS VITACORE. It was also originally available as orange powder drink . US Patented and tested as OK and works. Think of the water pot on stove with lime caked up . Add water and vinegar without stirring. After a while the pot is cleaner. The Proline + Lysine erodes away very slowly the Plaque build up in arteries from Cholesterol and fat. The autonomic process in body has no personal control. It constantly heals and adds collagen to arteries . If not enough collagen, process uses fat and cholesterol on surface of arteries. Poor diet. Takes a few weeks to feel better. A start of clearing on medial scan within 3 months. Full process takes a year constantly on pills. The Vit C allows body to MAKE collagen as well as from the food. So now you know. There was a movie years ago with Harrison Ford that was a put down on such a product. Producers of " The Fugitive" made it out as non worthy - they called it Provassic.

### ⭐⭐⭐⭐⭐ Goodbye cold sores!
*by A***D on August 18, 2025*

Since using this product I don't get cold sores anymore. It works really good at preventing them!

### ⭐⭐⭐⭐ Big Pill
*by K***T on February 13, 2025*

These are large pills but I have a pill splitter since split easy to take. Purchased accidentally but took them anyway and I do notice a slight difference in skin. Am getting another bottle to keep it up n see if more change happens.

## Frequently Bought Together

- Source Naturals Proline & Lysine, 550 mg - 120 Tablets
- NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules
- NOW Foods Supplements, Glycine 1,000 mg Free-Form, Neurotransmitter Support*, 100 Veg Capsules

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-30*