Excellent question! If you want your answer first it's No this isn't true. This is media hype. Creatine is a great supplement however. If you want to know why ask me! 

Carnosine is the most important buffer of lactic acid in muscle. It is synthesized from Beta-Alanine. It is a question of PKa.

Now if you want to know why this isn't true about Creatine buffering lactic acid Read On but Hang On it could get bumpy!

On the chalkboard it is possible. Problem is actually determining how much it helps. It is hard to tell since there are multiple sources of intracellular phosphate available to buffer the acid. Buffers are broken down into 3 major types; protein buffers, carbonic acid-bicarbonate buffers and phosphate ion buffers.  Creatine (only phosphorylated types) would fit into the last category. Phosphocreatine is responsible for approximately thirty percent of the muscle's capacity to buffer the H+. Claims made that creatine is responsible for the buffering of lactic acid are weak, the buffering is likely due to the phosphate in the phosphorylated creatine, acting as the buffer and not the creatine molecule itself. Plain creatine is phosphorylated during the creatine kinase enzymatic process. This result is phosphocreatine, which would then fit into the potential buffer role (now that is has the phosphate). Muscle cells will form phosphocreatine as needed for the ADP to ATP process by using the creatine kinase pathway.

Creatine can delay the rise of lactic acid in muscle during a short burst of peak effort, but not through any action as a ‘buffer’.  I can explain the reasons and its relation to ‘buffers’ if you wish.

I have turned off the fasten seat belt sign. You are free to get up and go to the gym now. MM

Just remember we evolved over the last 300,000 years eating only protein and fat with very trace amounts of carbohydrate until in the last 2,000 years when agriculture was invented as a cheap way of feeding the slaves and peasants, while nobility still ate mostly meats. 2,000/300,000 comes out to less than 1% and so hasn't even made a ripple in our evolutionary genetic makeup.  Hence the reason of all the widespread disease in this country now caused by the over consumption of carbohydrates. Such as Obesity, Diabetes, Cholesterol, Heart Disease, and Cancers.........the list goes on.

Your girlfriend has been reading some of the ill informed diet advice from the fashion magazines and fitness magazines that she has stacked up all over her place. Yes there is a lot of confusion on this matter. Lets start with this. There is No Evidence in scientific literature that high protein diets are harmful to normal, healthy individuals. Yes, people with impaired kidney or liver function or disease should avoid high protein diets along with a lot of other things. The liver and kidneys process everything you ingest, including medications and chemicals found in foods. I am assuming you do not have any of those conditions or you would have brought them up. So this doesn't apply to you or most healthy people.

That said; keep in mind that all 3 types of nutrients (fat, carbs, protein) are broken down into a single unit of energy for the body to use for fuel, the almighty kilocalorie. What happens to each nutrient type on the way to being converted to kilocalories is a different story however. Keep a few basic points in mind and you will be fine. Carbohydrates = insulin. Simple. When you ingest a carbohydrate a chemical signal is sent from the stomach to the pancreas to secrete a hormone called insulin. Insulin signals the body to "store" the kilocalories for future use as energy. Unfortunately the storage occurs mostly in fat cells. Each time the carb signal is sent your fat cells are filling up and getting bigger. This makes sense since your fat cells are where the body turns for energy when you are in prolonged starvation mode. In that case, fat cells release energy for use and gradually get smaller. Unfortunately, is it much easier to store it than burn it! Proteins and fats do not trigger this insulin release and you completely avoid the fat cell response. Keep in mind that the American diet is largely carbohydrates and you see why the nation is fat and getting fatter! The low-fat craze is not helping things since most of those products have extra sugar to compensate for the lack of taste. So again, you are continually eating and sending the signal for your fat cells to get more plump! Stick to the basics and you will be fine. Eat and drink lots of protein (not less than 1mg/kg of bodyweight) to help support the muscles you are traumatizing each time you train. They need the amino acids from protein to repair after each session. Eat good fats, not cheese and milk-based fats. Avoid carbs, especially late in the day. Pretty simple. I have seen this approach work quite well for hundreds of people who really did not know any better. Make sure to drink plenty of water, just good 'ol water. Don't count the water in caffeinated sodas, coffee, tea or alcohol. These drinks cause you to urinate a tremendous amount of fluid that you would otherwise keep inside for normal processes. Water keeps your kidneys flushed and happy no matter what kind of diet your on! So keep yourself on by responding to her with this blog and to get yourself kicked into her bedroom read the "HER", http://www.rgxlife.com/her/ , section for more brownie points.

Ah, what you are describing is a Mesomorph (perfect body).  Basically a genetic body type that would resemble a Greek sculpture. This person defies all the rules
that the rest of us have to follow in an attempt to look like him. The majority of us are either Endomorphs (fat), Ectomorphs (skinny) or a third subclass created by modern diets that I call EndoEctos (skinny-fat). These are the people who eat junk food all day long and experience little or no physical activity on a regular basis. We have all seen this type.....the guys with the skinny upper body, skinny legs and a belly.........or the woman with the thin torso and arms, but an explosion of chunk at the waist and hips.
 
All this means is that the guy you are describing is a genetic anomaly (freak) compared to the rest of us. This person can eat two Big Macs, supersize fries and coke in the car, then walk into the gym looking like they are ready for a bodybuilding contest.  They eat carelessly and get great results from it! I'm jealous!
 
The worst part of all this is that the Mesomorph is the person who people look to for advice! This person is unknowingly misleading everyone else not as genetically gifted as he. Not on purpose, he just does not know better! They know they look good and the crappy diet and training work for them.
 
What you must do is realize that you have to train according to your genetics. Train for short periods of time (45minutes or so) very intensely and take days off for recovery in between each session. Many pro athletes now subscribe to the less-is-more theory in the gym and it is paying big dividends. Depending on how long you have been training and what you are training for, shoot for 4 hours of gym time per week. Hit it for 1 hour on 4 days and get down to business. Lift and go home, don't chat or watch the TVs! Distractions at the gym can train wreck gains, even for the most dedicated athletes.

Try not to stress. Don't workout when you haven't slept, feel sick or haven't eaten properly that day. Admire the guy who looks good in the gym and know that's why you are training, but put yourself through the paces that you can handle.
 
Don't get caught up in the monkey see, monkey do gym mentality. The rest of the monkeys in the gym are doing what Mesomorph does but they don't look a bit like him! Go figure.....
 
 
Train Hard, Eat Hard, Sleep Hard!

Men are genetically predisposed to storing Fat around their midsection. Getting rid of it there isn't actually that hard since we do a good job of burning it from there as well.

To start with, stop drinking beer and watch what you eat! Duhh did I really need to tell you this? Light beer, low carb beer and liquor aren't going to help you unload that lard and let us all see your abs.

Here is why and what the Beer Boys Marketing people don't want you to know. The carbs in the beer aren't that big of an issue. Its the alcohol that makes you fat. Alcohol slows your metabolism in a drastic and immediate manner. Alcohol is like a monkey wrench in the gears of your metabolism! Drink a couple of times a week and metabolic hormones used to burn fat and help build muscle are constantly suppressed. Also every gram of alcohol is instantly turned to fat as well, since your body can't use it for energy like it can protein and carbohydrates. How many beer drinkers do you know with great muscles? Very, very few I suspect. Oh and now you're thinking "I will just have some of my girlfriends wine......" Sorry it has more sugar than beer and still has the alcohol to boot! So now you're putting your thinking cap on.......Getting the picture? Alcohol=bad, unless the gut is what you want.

Now stop drinking sodas and juice, and replace all the carbs in your diet with protein from meats and other protein sources. Read the recipes posted on here if you need help on that. Oh yeah. Carbs are things like bread, potatoes, rice, chips, etc. Do this for a week and you will already see it working. Do it for a month and people will be noticing and telling you so. You will feel better, look better, and be on your way to leaning out and looking like you should.