Cereal Safety

Publication Date: 
Mon, 06/01/2015
By: Alere Staff

Many advertisements and marketing campaigns speak of the importance of breakfast as the first meal of the day. Ideas of what makes breakfast have changed over the years with some people now reaching for protein shakes or health bars as they head out the door. Despite all the dietary fads, the choice that seems to always find itself on the American breakfast table is the bowl of cereal.

Good news will greet you in the morning as many breakfast cereals are not a high source of vitamin K. Therefore, this breakfast favorite plays very little, if any, role in how warfarin works. 

While cereal has become less popular in the recent decade, America still has its top favorites.1 These breakfast mainstays include General Mills Cheerios™, Kellogg’s Frosted Flakes® and General Mills Cinnamon Toast Crunch®.1 Below are a list of some of the more popular brands with both their serving sizes and vitamin K content.2

Cereal Serving Size Vitamin K Content
(in micrograms)

General Mills, Cheerios

1 cup (about 28 g) 0.5 µg Low
General Mills,
Honey Nut Cheerios™ 
3/4 cup (about 28 g) 0.6 µg Low
General Mills,
Multi-Grain Cheerios™
1 cup (about 29 g) 0.5 µg Low
Frosted Flakes
3/4 cup (about 30 g) 0.1 µg Low
Special K®
1 cup (about 31 g) 0.1 µg Low
General Mills,
Cinnamon Toast Crunch
3/4 cup (about 31 g) 2.9 µg Low

While many popular cereals have little vitamin K content, what you put on your cereal may also impact your vitamin K. Be aware of these additions to your bowl:

Food Serving Size Vitamin K Content
(in micrograms)
Strawberries 1 cup Up to 4.3 µg Low
Yogurt (plain) 1 cup 0.5 µg Low
Bananas 1 banana 0.8 µg Low
Figs 2 figs 5.9 µg Low
Dates 1 cup 4.8 µg Low
Blueberries 1 cup up to 40.7 µg High

So, go ahead and enjoy this most important meal of the day where even Kellogg’s Special K, contrary to its name, has almost no vitamin K present in a serving – the K, in fact, comes from the Kellogg’s name. Enjoy!

Interested in learning more? Check out these related articles:


  1. Ferdman, Roberto A. The Most Popular Breakfast Cereals in America Today. The Washington Post. March 18, 2015. Retrieved from website: http://www.washingtonpost.com/blogs/wonkblog/wp/2015/03/18/the-most-popular-breakfast-cereals-in-america-today/.
  2. The National Agricultural Library. National Nutrient Database for Standard Reference Release 27. United States Department of Agriculture Agricultural Research Service. Retrieved May 29, 2015 from website: http://ndb.nal.usda.gov/ndb/search

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