Showing posts with label antioxidants. Show all posts
Showing posts with label antioxidants. Show all posts

Friday, December 11, 2020

What’s the deal with Kombucha?

 By Eva McCormick

Kombucha has been growing in popularity in the U.S. since the early 2000’s. Long before it made its way here, this fermented tea is thought to have originated in northeastern China around B.C. 246 and was brought to Japan by a doctor named Kombu, thus the name, who praised its detoxifying and energizing effects.  In the 20th century, Kombucha was brought to eastern Europe and became popular there until a tea leaf and sugar shortage during WWII greatly reduced its consumption.

Fun Fact! PespiCo Inc. owns one of the most commonly purchased brands of kombucha called “KeVita”.

Method of Preparation:

The process of making kombucha begins with obtaining a cellulose film called a SCOBY (Symbiotic Colony of Bacteria and Yeasts). Next, you boil tea (tea can be black, green, or a mixture) and water, remove the tea leaves, add sugar, and let cool to room temperature. Once the tea mixture is room temperature you add the SCOBY, cover the container with a cotton cloth and secure with a rubber band. The bacteria and yeast thrive at room temperature and begin to ferment sugars in-turn producing alcohol and multiple types of acids. During fermentation carbon dioxide is also produced which gives the tea a carbonated mouthfeel. Different fruits and herbs are often added to provide flavor and additional anti-oxidant properties. There are many commercially available kombucha starter kits complete with instructions on how to brew your own kombucha! https://www.thekombuchashop.com/

Proposed Health Benefits:

It is most widely known for potential benefits as a probiotic drink that benefits gut and immune health much like yogurt. Kombucha also contains tannins from the tea along with vitamins and minerals from added fruits and herbs that have been seen to protect against oxidative stress. Other large claims have been made by individuals have used this drink to treat IBS, but there is not research or enough clinical evidence to confirm these type of claims at this point.

         (http://www.getfrush.com/wp-content/uploads/KeVita-Kombucha-1-640x427.jpg)

At the very least kombucha can serve as a lower calorie, more nutrient-dense alternative to soda or alcohol. Most bottled kombucha contains less than 0.5% alcohol which puts it below the threshold of federal regulation and is much easier on the liver than alcoholic beverages.

References:

Coelho, R. M. D.,  Leite de Almeid, A.,  Gurgel, R.Q.,  Nascimento da Mota, A. R., & M. de Sousa, P. H. (2020). Kombucha: Review. International Journal of Gastronomy and Food Science, 22.

Tuesday, November 20, 2018

The Power of Antioxidants


By Rose Gallo

Antioxidants are substances that can prevent or delay cell damage caused by free radicals in the body. Whenever oxidative phosphorylation occurs in the body, most commonly when the body converts ADP to ATP, free radicals are created. These substances are highly reactive and can cause damage to the body if not balanced by antioxidants. When antioxidants are low, and therefore a high amount of free radicals in the body exists, oxidative stress can occur which causes various health problems. Oxidative stress promotes inflammation in the body in addition to increasing the risk of chronic disease such as heart disease, cancer, and immune deficiency.

https://thedoctorweighsin.com/oxygen-free-radicals-and-all-that-jazz/

In order to combat the oxidative stress produced in the body, we must consume the correct amount of antioxidants. Some are available in the form of supplements, but there has been conflicting evidence as to if these cause an over consumption of antioxidants and actually incur more damage then preventing it. Therefore, it is best to consume antioxidants through food. Specifically they are found in fruits and vegetables, which are rich sources of antioxidants.

https://www.medicalnewstoday.com/articles/301506.php

Some of the most popular antioxidants and rich food sources are below:
  • Vitamin A (beta carotene) – necessary for eye function, cell growth and differentiation1
    • Male RDA: 900 mcg RAE // Female RDA: 700 mcg RAE
    • Sweet potato
    • Spinach
    • Carrots
    • Cantaloupe
    • Red pepper
    • Broccoli
  • Lutein & Zeaxanthin – related to beta-carotene, protect the eye from light damage2,3
    • Broccoli
    • Spinach
    • Kale
    • Kiwi
    • Orange juice
  • Vitamin C – necessary for synthesis of collagen, L-carnitine, & neurotransmitters; can regenerate other antioxidants in the body4
    • Male RDA: 90mg // Female RDA: 75mg
    • Red & green peppers
    • Orange juice
    • Broccoli
    • Strawberries
    • Grapefruit
  • Vitamin E – stops production of free radicals during oxidation; promotes healthy blood vessels5
    • Male RDA: 15mg // Female RDA: 11mg
    • Sunflower seeds
    • Almonds
    • Hazelnuts
    • Peanuts & peanut butter
    • Spinach
  • Lycopene – major red pigment in fruits; best antioxidant against singlet oxygen (ROS) preventing damage to lipids, proteins, and DNA6
    • Tomato & tomato products
    • Grapefruit
    • Watermelon
  • Selenium – essential functions in the immune system & thyroid hormone biosynthesis7
    • RDA: 55mcg8
    • Brazil nuts
    • Fish
    • Pork & beef
    • Turkey & chicken9
  • Manganese – aids in prevention of free radical production in the mitochondria of the cell10
    • Male RDA: 2.3mg // Female RDA: 1.8mg
    • Pineapple
    • Pecans
    • Almonds
    • Peanuts
    • Beans

References
  1. Office of Dietary Supplements - Vitamin A. NIH Office of Dietary Supplements. https://ods.od.nih.gov/factsheets/VitaminA-HealthProfessional/. Published October 5, 2018. Accessed October 29, 2018.
  1. Lutein: Uses, Side Effects, Interactions, Dosage, and Warning. WebMD. https://www.webmd.com/vitamins/ai/ingredientmono-754/lutein. Accessed October 29, 2018.
  1. Lutein and Zeaxanthin for Vision. WebMD. https://www.webmd.com/eye-health/lutein-zeaxanthin-vision. Accessed October 29, 2018.
  1. Office of Dietary Supplements - Vitamin C. NIH Office of Dietary Supplements. https://ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/#en3. Published September 18, 2018. Accessed October 29, 2018.
  1. Office of Dietary Supplements - Vitamin E. NIH Office of Dietary Supplements. https://ods.od.nih.gov/factsheets/VitaminE-HealthProfessional/. Published August 17, 2018. Accessed October 29, 2018.
  1. Levy J, Sharoni Y. The Functions of Tomato Lycopene and Its Role in Human Health . The Journal of the American Botanical Council. 2004;(62):49-56. The Journal of the American Botanical Council. Accessed October 29, 2018.
  1. Baraboĭ VA, Shestakova EN. [Selenium: the biological role and antioxidant activity]. Ukrains'kyi biokhimichnyi zhurnal (1999 ). https://www.ncbi.nlm.nih.gov/pubmed/15909414. Published 2004. Accessed October 29, 2018.
  1. Selenium. WebMD. https://www.webmd.com/a-to-z-guides/supplement-guide-selenium#1-3. Accessed October 29, 2018.
  1. Olsen N. 20 Foods Rich in Selenium. Healthline Newsletter. https://www.healthline.com/health/selenium-foods#bananas. Published January 16, 2018. Accessed October 29, 2018.
  1. Manganese. Linus Pauling Institute. https://lpi.oregonstate.edu/mic/minerals/manganese. Published January 1, 2018. Accessed October 29, 2018.