×
Newsmax TV & Webwww.newsmax.comFREE - In Google Play
VIEW
×
Newsmax TV & Webwww.newsmax.comFREE - On the App Store
VIEW
Skip to main content
Tags: high | dose | vitamin c | side effects

High Dose Vitamin C Side Effects: These 5 Drawbacks Associated With Megadoses

High Dose Vitamin C Side Effects: These 5 Drawbacks Associated With Megadoses
(Joe Raedle/Getty Images, file)

By    |   Wednesday, 17 December 2014 04:36 PM EST

Many studies have concluded that high doses of vitamin C are beneficial in the treatment of some health issues including heart health, immune system support, increased lifespan, and in the treatment of cancer. However, doses above the recommended dietary allowance of between 75mg for women and 90mg for men can cause side effects.

Here are five side effects that high doses of vitamin C can cause:

Urgent: Discover Your Risk for Heart Disease, Take the Test Now!

1. Diarrhea: According to Livestrong, when taking vitamin C the "tolerable upper limit is the maximum amount of a vitamin you can take each day without experiencing any ill effects." One of the drawbacks to taking high doses of vitamin C is "severe gastrointestinal irritation and diarrhea." This can lead to dehydration, extreme thirst, fatigue, low urine output, and reduced blood pressure.

2. Nausea, vomiting, and heartburn: Even though vitamin C is water-soluble and is not stored in the body, in higher doses it can cause nausea to the point of vomiting as well as heartburn. The Merck Manual states that in relation to high doses of vitamin C, nausea is a sign of "vitamin C toxicity."

3. Increased iron absorption: Hemochromatosis is a defect in the genes that controls how iron is absorbed in the body. According to the Center for Disease Control and Prevention, taking supplements can increase the buildup of iron in the body for people at risk of developing hemochromatosis. High doses of vitamin C can "cause the body to absorb more iron" and thus are not recommended for people with hemochromatosis.

Urgent: Assess Your Heart Attack Risk in Minutes. Click Here.

4. Insomnia: One of the side effects of taking megadoses of vitamin C can be insomnia. For some, the vitamin has a stimulating effect, which can result in sleeplessness especially if taken after 6 p.m.

5. Kidney stones: Some research indicates that high doses of vitamin C may cause kidney stones, especially in men. Researchers "suspected that greater amounts of vitamin C could elevate the risk of kidney stones because the body breaks down the vitamin into material known as oxelate — a part of the stones," says Medical News Today. It is recommended that people with a history of kidney stones consult with their physician before taking high doses of vitamin C.

This article is for information only and is not intended as medical advice. Talk with your doctor about your specific health and medical needs.

© 2022 Newsmax. All rights reserved.


FastFeatures
Many studies have concluded that high doses of vitamin C are beneficial in the treatment of some health issues including heart health, immune system support, increased lifespan, and in the treatment of cancer. However, doses above the recommended dietary allowance can cause side effects.
high, dose, vitamin c, side effects
413
2014-36-17
Wednesday, 17 December 2014 04:36 PM
Newsmax Media, Inc.

Sign up for Newsmax’s Daily Newsletter

Receive breaking news and original analysis - sent right to your inbox.

(Optional for Local News)
Privacy: We never share your email address.

PLEASE NOTE: All information presented on Newsmax.com is for informational purposes only. It is not specific medical advice for any individual. All answers to reader questions are provided for informational purposes only. All information presented on our websites should not be construed as medical consultation or instruction. You should take no action solely on the basis of this publication’s contents. Readers are advised to consult a health professional about any issue regarding their health and well-being. While the information found on our websites is believed to be sensible and accurate based on the author’s best judgment, readers who fail to seek counsel from appropriate health professionals assume risk of any potential ill effects. The opinions expressed in Newsmaxhealth.com and Newsmax.com do not necessarily reflect those of Newsmax Media. Please note that this advice is generic and not specific to any individual. You should consult with your doctor before undertaking any medical or nutritional course of action.

 
TOP

Newsmax, Moneynews, Newsmax Health, and Independent. American. are registered trademarks of Newsmax Media, Inc. Newsmax TV, and Newsmax World are trademarks of Newsmax Media, Inc.

NEWSMAX.COM
America's News Page
© Newsmax Media, Inc.
All Rights Reserved
Download the NewsmaxTV App
NEWSMAX.COM
America's News Page
© Newsmax Media, Inc.
All Rights Reserved