Doctors Best Amino Acids Products

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the Vitamin Shoppe
Carnipure L-Carnitine - Supports Cardiovascular Health, Energy Production & Fat Metabolism - 1,000 MG (50 Tablets)
Carnipure L-Carnitine - Supports Cardiovascular Health, Energy Production
- Supports cardiovascular health and energy production
- Promotes fat metabolism
- Suitable for everyday wellness seekers
- Free of gluten, dairy, soy, and nuts
You can't power through your wellness goals without revving yourself up first. Luckily, The Vitamin Shoppe® brand Carnipure® L-Carnitine tablets can help with that. L-carnitine is derived from an amino acid that's found in nearly all cells of the human body. It promotes cellular energy production, fat metabolism, and cardiovascular health.

Simply take one tablet per day in between meals to stay energized with 1,000mg of carnitine per serving.

Frequently Asked Questions

What is Carnipure®?
Carnipure® is a brand of l-carnitine.
Rated 2 stars out of 5 stars, From 2 customer reviews
$37.99
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the Vitamin Shoppe
L-Arginine HCl Amino Acid Powder - Nitric Oxide Booster & Supports Cardiovascular Health - Tropical Flavor (50 Servings)
L-Arginine HCl Amino Acid Powder - Nitric Oxide
- Supports cardiovascular health
- Promotes nitric oxide production
- Free of gluten, dairy, soy, nuts, sugar, salt, and synthetic colors
- Tropical flavor
L-arginine is a free-form amino acid that the body converts into nitric oxide, which plays a critical role in circulation and cardiovascular health. When bonded with hydrogen chloride (HCl), l-arginine becomes much more soluble.

Containing 6 grams of l-arginine per serving, The Vitamin Shoppe^® brand L-Arginine HCl Amino Acid Powder is perfect for showing your heart some love.
Rated 4 stars out of 5 stars, From 12 customer reviews
$24.99
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the Vitamin Shoppe
L-Citrulline - Free-Form Amino Acid - Nitric Oxide Booster - 3,000 MG - Tropical Flavor (10.7 oz./66 Servings)
L-Citrulline - Free-Form Amino Acid - Nitric Oxide
- Supports nitric oxide production
- Promotes exercise endurance and cardiovascular health
- Free of gluten, dairy, soy, and nuts
- Tropical flavor
Whether you're a weightlifter, runner, or simply mindful of your cardiovascular wellness, l-citrulline can help. The body converts this free-form amino acid into nitric oxide, which is a vasodilator that promotes endurance, healthy circulation, and increased blood flow to working muscles.
Rated 4 stars out of 5 stars, From 10 customer reviews
$29.99
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Zhou Nutrition
Collagen Peptides Powder - Grass Fed & Pasture Raised Hydrolyzed Protein - Unflavored (46 Servings)
Collagen Peptides Powder - Grass Fed & Pasture
- Bone Health*
- Joint Mobility*
- Skin Cell Health*
- Essential Amino Acid Source*
- Hair & Nail Strength*
- Healthy Gut Support*
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Rated 5 stars out of 5 stars, From 443 customer reviews
$49.99
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What is Doctor’s Best?

For over three decades, the Doctor’s Best brand has taken a science-based approach to making nutritional dietary supplements to promote overall well-being and healthier living.

What are the different types of Doctor’s Best supplements?

The product line from this brand includes a range of supplements, including the following popular varieties:

Doctor’s Best Magnesium

Important for many chemical reactions throughout the body, magnesium is an essential mineral. Doctor’s Best high-absorption magnesium supplement comes in convenient tablets and flavored powder so you can choose the format you prefer.

Doctor’s Best CoQ10

Coenzyme Q10 plays a role in cellular energy production and helps protect cells against free radical damage. Find this supplement from Doctor’s Best in capsules, softgels, and gummies in a variety of strengths and quantities.

Doctor’s Best MSM

Methyl-sulfonyl-methane, also known as MSM, is an important nutrient for joint health and flexibility as well as immune support. Doctor’s Best makes Glucosamine Chondroitin MSM formulas for joint support as well as a powdered MSM supplement that easily mixes into drinks.

More Supplements from Doctor’s Best

Additional products from this line include curcumin, serrapeptase, vitamins, amino acids, ubiquinol, and more supplements for various health concerns.

Where to buy Doctor’s Best

We carry a range of Doctor’s Best brand products at The Vitamin Shoppe. Shop online and get free in-store pickup and even free shipping on qualifying orders.

Find Amino Acids at The Vitamin Shoppe Store Near You

There are more than 600 The Vitamin Shoppe® stores across the US, so it's very likely you can pop in and find Amino Acids locally. Check out our store locator to find a Shoppe near you. Don’t forget—you’ll save at least 15% on every subscription with Auto Delivery, plus an addition 5% off select brands to help you stay on the path. Not only will you never miss a thing, but you’ll also get free shipping on subscription refills of $25 or more!* You define what better looks (and feels) like—Count on us to help you get there.

Shipping & Returns

FREE for Orders over $45

Orders under $45, domestic shipping is only $7.99. Find more at our Shipping Policy page.

Return Policy for Items Purchased Online

Shop with confidence with our Easy Returns Policy. Customers may return any opened or unopened merchandise purchased from any Vitamin Shoppe channel to any Vitamin Shoppe store within 30 days. Find more at our full Returns Policy page.

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