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Vitamins and Supplements: Common Questions

1.Why are dietary supplements important?


Despite the overabundance of calories in the standard American diet, nutrient deficiencies remain surprisingly common. One study from 2017 reported that 31% of the US population was at risk for at least one nutrient deficiency. Dietary supplements can help fill this gap. Dietary supplements can provide clinically studied nutrients to help maintain wellness. Our bodies require vitamins and supplements to function properly, but with busy lives, readily accessible processed foods and little time for exercise, getting enough essential nutrients is difficult. Our products are formulated to provide optimum benefits.


2. How do I know that I am taking good-quality vitamins?


Scrupulous dietary supplement companies maintain supply chains that adhere to Good Manufacturing Practice (GMP) as set forth in 21 CFR Part 111 of the Food, Drug and Cosmetics Act. Make sure the supplement company you choose can confirm their supply chain is GMP compliant. Also, companies that stand by their products should happily provide a Certificate of Analysis (CoA) for any product upon request. The CoA provides information related to each product batch’s adherence to finished-product specifications.

3. How do I choose the right supplement?


Health and nutrition goals can vary a lot from person to person. Finding supplements that align with your goals can be challenging. That’s why we offer comprehensive Supplement Guides to help simplify supplementation. We also offer—as a free service—phone consultations with knowledgeable Wellness Specialists, to help guide you, because every body is different. They can be reached at 1-800-226-2370. Another great way to help determine which supplements might benefit you is by having your blood tested to see if you have biomarkers of any particular concerns that supplements and lifestyle changes might help address.

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Amino Acids

Our bodies use 20 different amino acids to form the proteins required for cells to function properly. Nine of these are essential amino acids.

Bone Restore

We offer high-quality supplements with ingredients like magnesium, boron and K2. Our Bone Restore supplements are easily absorbable and help support and promote healthy, strong bones and more.

Letter Vitamins

Even if you try to eat a balanced diet, it’s difficult to get the optimal doses of all the vitamin B, C, D, E and K the body needs.


Curcumin is a turmeric spice extract with widespread health benefits. Our Curcumin Elite™ provides free curcuminoids to support healthy joints, vital organs, heart health and immune response.

Fish Oil & Omegas

Omega-3 fatty acids, found in cold-water fish (fish oil), chia and flaxseed, are essential to a healthy diet.


Our award-winning coenzyme supplement is one of five essential nutrients for maintaining vitality and wellness.

Everyday Essential Vitamins

What are vitamins and supplements?
Vitamins are essential nutrients that your body needs to stay healthy—they keep your internal systems working optimally. There are 13 essential vitamins – vitamins A, C, D, E, K, as well as eight different B vitamins – thiamine, riboflavin, niacin, pantothenic acid, biotin, B6, B12 and folate.


Most of these essential nutrients can be found in the healthy foods on your plate, but diet alone does not always provide enough nutritional support. That's why many people choose to supplement to avoid vitamin deficiencies.


Where can you buy vitamins online?
For more than 40 years, Life Extension has been the go-to source for the best nutritional products that science can offer. Our high-quality formulas deliver essential nutrients and dosages that have been studied through clinical research and verified by third party lab testing. Our vitamins and supplements are not only high-quality, but the majority of them are also non-GMO, gluten-free and vegetarian.


Whether you are looking for vitamins and supplements targeted to address specific health concerns, or you're seeking support for whole body health, Life Extension has your back (and all other parts of your body, too!)


What vitamins should I take?
Vitamins and supplements play in an important role in your overall health and well-being. There are vitamins and minerals that should always be part of your wellness routine—many of which are hard to come by from the typical diet.

Make sure to incorporate these nutrients into your lifestyle to promote optimal health and longevity.


Vitamin A
Vitamin A is an essential fat-soluble vitamin that is necessary for a healthy heart, lungs, eyes and healthy immune function.  You can only get some of this essential nutrient from a healthy diet. Good food sources of vitamin A include lean beef, broccoli, carrots and green leafy vegetables. A vitamin A supplement can fill in any dietary gaps.


Vitamin D3
Also known as the "sunshine vitamin," vitamin D is produced by your body through exposure to the sun as well as some foods and is responsible for healthy bones and immune system. Vitamin D is also important for maintaining cognitive health function as you age and helps support heart health and already-healthy blood pressure levels.


Your body needs iron as an essential part of maintaining healthy red blood cells. Optimal iron levels helps encourage oxygen levels in your cells and supports cellular energy and immune health.


When should I take vitamins and supplements?
Most vitamins and supplements can be taken any time, day or night. It is always best to take a vitamin or supplement with food for optimal absorption.


Vitamins and supplements are important components to a wellness routine and compensate for any gaps in your everyday diet. To be on the safe side, check with your doctor before incorporating supplements into your regimen. It is also critical to follow the dosage instructions on the bottle and not to take more than recommended.