- Home
- / CL Answers
- / Do vitamins, minerals and nutritional supplements lose effectiveness with exposure to high temperatures and is it safe to order supplements by mail in the summer?
www.consumerlab.com/answers/do-supplements-lose-effectiveness-in-the-heat/vitamin-temperature/
Save to favorites
This feature is restricted to active members.
Join now to save favorites and get all member benefits, including over 1,400 reviews.
Join NowAlready a member? Sign in here.
Our Members Asked:
Do vitamins, minerals and nutritional supplements lose effectiveness with exposure to high temperatures and is it safe to order supplements by mail in the summer?

Answer:
Many vitamins and other supplements can degrade faster and lose effectiveness when exposed to excessive heat, light, oxygen in the air, or humidity. Even under ideal conditions, vitamins normally degrade over time, but this process is accelerated by poor storage conditions. Although overly degraded supplements may not be unsafe to take, you won't receive the amount of ingredient stated on the label and may not get the desired effect.
See the full answer for how different types of supplements are affected by the environment, particularly heat, and what you should do to protect them. Get the Full Answer >>
Join today to unlock all member benefits including full access to all CL Answers and over 1,400 reviews.
Join NowAlready a member? Sign In Here.
Join now at www.consumerlab.com/join/
Agree to Comment Terms
Please abide by the following:
- If you make a statement of fact, such as whether a type of treatment does or does not work, state your basis -- such as personal experience or a published study.
- If you make a positive or negative comment about a product, note whether or not you have a financial interest in the product or in a competing product.
- Please be respectful in your tone.
- Please do not submit any type of HTML markup or scripting as it will not be accepted, nor will posts that exceed 2,500 characters.
For your privacy, only your first name (from your account) followed by a random number will appear with your comment. Your last name and email address will not be displayed.
Your comment has been submitted
We will review your comment before it is posted.
Related CL Answers (12)
Related Content
Join over 90,000 Members
Find the best products with instant access to our latest tests & reviews of over 1,400 health products.

Save money by finding high-quality products at lower cost.
Be alerted to new clinical findings & warnings.
See answers from our experts.
Stay informed with our e-newsletter.
Submit your comment
This feature is restricted to active members.
Join now to add comments and get all member benefits, including over 1,400 reviews.
Join NowAlready a member? Sign in here.