Blog

8

2

Hey there, i have a question for anyone who may know more about this. I've been thinking of using more raw eggs in my diet recently, since it's as close to natural as you can get (although there's nothing wrong with frying them in some good oil). But i always made sure they were cooked in the past because i held on to the belief that the antinutrient avidin was quite bad.

If i remember correctly, avidin prevents like 50% of the absorption of biotin in the body, so why eat eggs raw? unless this antinutrient isn't that bad... It just seems like eating raw eggs with any protein makes the meal less nutritious overall.

flag

18 Answers

8

I'm surprised that no-one has mentioned that Avidin is only found in the egg whites and is a one-one biotin blocker. Biotin is found in the yolks.

If you eat the uncooked eggwhites alone, it will block biotin from other sources (like liver) as well.

Avidin is a glycoprotein found in raw egg white. It combines stoichiometrically with biotin. The toxic effect of uncooked egg white which causes a syndrome similar to that of vitamin B deficiency (Boaz 1924) led to the discovery of the vitamin biotin (Gyorgy 1931, 1939). The toxic factor, first isolated by Eakin et al. (1940, 1941) who named it avidin, combines with the essential growth factor resulting in a "non-digestible" avidin-biotin complex which is not absorbed from the intestine or from the surrounding medium by microorganisms. Avidin plays an important role in biotin function studies and in the study of several enzymes in which biotin is a coenzyme. Avidin or avidin subunits bound to a matrix have been utilized for affinity purification (Berger and Wood, 1975; Green and Toms, 1973).

You Really Need Biotin to be bioavailable, so avoid uncooked egg whites.

http://en.wikipedia.org/wiki/Avidin

http://en.wikipedia.org/wiki/Biotin

WHY YOU NEED BIOTIN FROM http://lpi.oregonstate.edu/infocenter/vitamins/biotin/

Biotin activates carboxylases!

Each carboxylase catalyzes an essential metabolic reaction:

  • Acetyl-CoA carboxylase I and II catalyze the binding of bicarbonate to acetyl-CoA to form malonyl-CoA. Malonyl-CoA is required for the synthesis of fatty acids. The former is crucial in cytosolic fatty acid synthesis, and the latter functions in regulating mitochondrial fatty acid oxidation.
  • Pyruvate carboxylase is a critical enzyme in gluconeogenesis—the formation of glucose from sources other than carbohydrates, for example, amino acids.
  • Methylcrotonyl-CoA carboxylase catalyzes an essential step in the catabolism of leucine, an essential amino acid.
  • Propionyl-CoA carboxylase catalyzes essential steps in the metabolism of certain amino acids, cholesterol, and odd chain fatty acids (fatty acids with an odd number of carbon molecules).

When I do eat raw eggs, I'm just eating the yolk. YUMMY! Part of Mayo is very good for you.

Just make sure that they are free-range/organic to make sure you have lowered your salmonella chances.

link|flag
1 
Bang on - I'll just copy an answer I made to a similar question earlier today.. Just chug em down! Raw egg yolks will deliver the biotin in full. Otherwise throw them into a steak tartare. Stephen is on the money here, egg whites are the bit you throw away, not the other way around. DON'T eat raw eggs WHOLE - the raw egg white destroys the biotin in the yolk. This another reason never to scramble your eggs. I separate my eggs, have some of the yolks raw - then cook the whites (fry them with shallots and hot pepper sauce), adding one or two raw yolks at the end. – mindmt Jan 8 2012 at 20:33
6

If you mix them with very dark chocolate to make chocolate mousse, they are worth eating raw! ;)

link|flag
5

It probably sounds gross to most people, but what I like to do is seperate a few yolks (usually four) into a bowl. At the same time I will fry up some onions, peppers, and maybe some left over meat or a couple chunks of potato. Once all of that has been cooked through I will dump the pan, butter and all into the bowl of egg yolks and stir. This will usually warm the yolks to the consistency of over easy egg yolk. Tastes awesome but you will get looks!

link|flag
1 
Not gross...delicious. Mmmm. – January Jan 8 2012 at 20:02
4

I've been eating raw eggs for several years (from a trusted local farm). I add 2-4 of them to a raw goat milk-coconut milk shake I make in the morning. I seperate out the whites due to the biotin thing, although I've read that you'd have to eat like a dozen for that to have any negative effect... If I cook them I do it over easy, runny yolk in either bacon fat, tallow or coconut oil...

link|flag
4

I can see the rationale for eating the yolks raw. With egg whites there seems little scope for benefit, only disadvantages. The whites contain virtually no micronutrients anyway (apart from a bit of selenium and riboflavin), just protein, which you'd be less able to utilise anyway were it uncooked. Also some people seem to be intolerant to egg whites, a problem which is mitigated when the whites are cooked.

link|flag
3

The CDC estimates that 1 in 20,000 uncooked eggs carries salmonella. The disease is supposedly transmitted directly from the hen before the egg is fully formed. That's not a lot of eggs but if you eat at a restaurant where hundreds of eggs are cracked together and mixed and then used for something in which they are not fully cooked, then your chances of exposure go way up. All that being said, raw eggs mixed into a batter of nut butter and bananas is delicious and I will surely continue to lick the bowl as the rest of the batter is cooking. But I will also continue to cook the rest of my eggs. I have never seen any research that raw eggs are better for you and personally I think in most cases they taste much better cooked. Plus some research suggests that cooking lessens levels of avidin by up to 70% (for frying) and enhances digestiblity. http://www.cholesterol-and-health.com/Egg_Yolk.html Biotin deficiency is rare so temporarily impaired absorption is probably not a big deal unless you eat tons of eggs, but since I like my eggs cooked anyway, I see no reason to make a special effort to eat them raw.

link|flag
2

I ate my first raw egg yolk. It tasted like....egg yolk. What a surprise! lol.

An earlier commenter said it sounded disgusting but it really wasn't. I'm not wowed by the taste but it wasn't bad. I think what probably makes it taste bad is if you leave the egg white in there. Drain the egg white out...

Anyway, in answer to the original question, it is worth trying at least once (but not with a conventional egg) if you feel that adventurous.

link|flag
I agree on ditching the uncooked eggwhite... See my answer for why. – Adam Crafter Oct 20 2010 at 17:26
2

Cooking an egg in Bacon fat makes for my absolute favorite Saturday treat.

That being said, Organic pastured eggs are fine as long as you don't have an egg allergy.

Alot of raw carnivores eat several a day and maintain excellent health.

Alot of great nutrients in raw egg yolk. K2 is only one of the big players

link|flag
Behold the secret power of Mayo! – Adam Crafter Oct 20 2010 at 17:25
Bacon mayo... .. – Stephen-Aegis Oct 20 2010 at 19:08
mmmmmm! Bacon Mayo! – Adam Crafter Oct 20 2010 at 19:21
1

I've heard raw egg yolk described as having a "pleasant" taste. They were talking about the yolk not the albumen. I don't know I haven't tried that yet. If I were to eat a raw egg it would definitely not be a conventional egg. Cage free at least...

link|flag
0

Personally I would not eat raw eggs even if it was advisable to do so. Cooked eggs are delicious, raw ones are disgusting. I see no point in eating something that is not enjoyable with all of the options we have.

link|flag
2 
Sure- you may not want to just eat raw eggs straight up, but what about a nice homemade mayonnaise? As I with most things, I suspect it's totally fine in moderation- even a bit more than that. – Nico Oct 8 2010 at 13:48
Honestly, someone digging up posts from almost a year ago for down-voting? Surely there's something else to do with ones time. – HeatherC Aug 21 2011 at 1:10
0

Raw eggs are lovely. I mix 3 organic eggs into a pint of raw organic milk. That's my breakfast. Why separate the white from the yoke? Nature doesn't make mistakes, mankind does. If the body doesn't use it , it will waste it. Why fuss over separating them? Just get them down you.

link|flag
7 
"Nature doesn't make mistakes" this doesn't really work here, as the egg evolved for replication of the chicken, not to suit our digestive system. – xjhues Oct 8 2010 at 16:37
5 
Another rational would be that most humans have probably evolved to best utilize eggs in their natural state. Yokes may be better, but that doesn't mean the white are useless. Still it is quite ironic that the powers that be have been telling everyone to throw out the oh so nutrient dense yokes and only eat the whites. Sometimes you have to wonder if everyone has gone insane! – Eva Oct 8 2010 at 18:24
0

These suggestions/answers actually sound very good. doug has an awesome idea, with the pouring of hot veggies/meat into raw eggs, sounds great. Also, i like darren's point that anything unused by the body is released - hence why 'fiber' just goes through you and out the other end.

While i don't doubt the nutrition or tastiness of eggs, as i believe they are a nutritional powerhouse, i was curious to find out if avidin was dangerous, seeing as how hindered protein absorption affects all protein you eat along with the eggs, including meat. Even common (albeit not always reliable) sourcces like wikipedia tell you avidin is bad due to hindered absorption.

Then again, biotin is only 1 essential vitamin out of many...

link|flag
0

I wouldn't eat them based on this, but one benefit to raw egg is that raw egg protein (mostly in the egg white) upregulates glutathione in otherwise protein-replete people, in similar fashion to whey protein.

link|flag
You just need to watch out for the avidin! – Adam Crafter Oct 20 2010 at 17:27
0

Another question: Is there such a thing as eating TOO many eggs? I counted how many eggs my partner and I ate one day and came up with 4 each...apart from limiting the variety of our diet is this bad?

link|flag
Four a day or four at one sitting? Four at one sitting is fine. If you eat 4 a day every day, as you mentioned, you might be unbalancing your diet a bit, but as long as you have no allergies to them, still probably not a big deal. I don't think the eggs themselves will hurt you, especially if they come from healthy chickens. – Eva Oct 9 2010 at 3:22
I often eat 6 to 8 and sometimes 10 a day. Not every day but most days. Learn about Jimmy Moore's eggsperement. bud.ca/2010/03/25/… and examiner.com/low-carb-lifestyle-in-national/… – Alan Oct 17 2010 at 13:27
0

I used to just eat eggs for protein [vegetarian gf] but got tired of cooking them in the morning so I just drank them with some tasty olive oil, and ate an apple or two.
I LOVE the idea of putting egg yolks in a shake. I'm going to have to try that for sure! Hey, probably better than whey, too

link|flag
yeah, it's kinda tasty. – Primordial Jan 8 2012 at 19:27
try yolks + cocoa + butter + banana + cinnamon + milk or water – Primordial Jan 8 2012 at 19:30
0

heard some where that if you drink the egg down straight (both the white and yoke) without breaking the yoke then there is no chance of geting a biotin deficinty becouse they digest at different rates if the yoke is whole.... anyone know how true this is???

link|flag
1 
It's nonsense, you absolutely cannot swallow a yolk without breaking it! Another issue - read other answer from David Moss - you absorb much less protein from the egg white if raw - actually only around 50 - 60%.. Cooking boosts the protein availability to better than 90%. That's why I recombine cooked whites (avidin destroyed) with raw yolks for my breakfast eggs. – mindmt Jan 8 2012 at 20:40
0

Well I just tried my first raw egg, didn't taste it at all! I mixed it into our nutritional shake mix with a dash of cocoa, almond milk, and 1 tbls almond butter. Liking the 45g of protein!!

link|flag
-1

I drink up to 30 raw eggs a day and I've lost fat and gained muscle. Love it

link|flag

Your Answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.