EAA, BCAA or Leucine. Which do you prefer?
- 06-07-2007, 04:39 AM
- 06-07-2007, 07:50 AM
I speculate to a certain degree how much amino acids you really need in general. I don't go out of my way though to supplement with amino acids in general outside of what Optimum Nutrition's Gold Standard provides me.
- 06-07-2007, 08:45 AM
Although many studies have shown that amino acid ingestion acutely stimulates protein anabolism, only few studies have investigated whether long-term supplementation promotes changes in body composition.
We therefore tested the hypothesis that l-leucine (LEU) and l-phenylalanine (PHE) supplementation might have a positive impact on the body composition of rats submitted to intermittent periods of food restriction and refeeding (weight cycling or WC).
The WC protocol comprised three cycles, each consisting of 1 week of 50% food restriction followed by 2 weeks of ad libitum ingestion. The groups submitted to WC ingested the control diet (WC-CON) or the diet supplemented with LEU+PHE (WC-AA). A pair-fed group receiving the control diet (PF-CON) was used as a reference for the effects of WC.
Although food intake was the same in all groups, higher body weight and energy efficiency were observed in the WC-AA group compared to the PF-CON and WC-CON groups although not significantly in relation to the latter. These results were the consequence of a significant increase of lean body mass and body protein content in the WC-AA group compared to the PF-CON and WC-CON groups.
The WC-CON and WC-AA groups presented 36.1% and 18.9% more body fat, respectively, than the PF-CON group but this difference was not significant.
Neither fasting insulin nor glucose concentration nor postprandial insulin secretion was significantly affected by the supplemented diet.
In conclusion, supplementation with LEU+PHE improved the body composition profile of rats submitted to WC, mainly by increasing lean body mass and body protein content.
Life Sci. 2007 Apr 24; Effects of leucine and phenylalanine supplementation during intermittent periods of food restriction and refeeding in adult rats.
06-07-2007, 08:53 AM
Sorry if I sounded cocky, I didn't mean that.
06-07-2007, 09:06 AM
I perfer BCAA's nly because they are the only type i have used. I tried the old Purple wrath and just couldnt stomach the taste and it didnt seem to be helping out much. Leucine has really caught my attention and I may be using it down the road
Last edited by Distilled Water; 06-07-2007 at 09:08 AM. Reason: answer the main question
Serious Nutrition Solutions Representative
06-07-2007, 09:20 AM
06-07-2007, 10:19 AM
Let me clarify what I had meant by my previous post. I did use amino acid specific supplements, and for a long time I took this high dosage amino acid blend that they have been mixing in cancer patients at our hospital to drink. It worked ok for me for awhile, but I would never pay the price tag that the hospital pays for them. The Optimum Nutrition's Gold Standard protein has a decent amount of BCAAs and amino acids per scoop, and I average about 5 shakes a day.
Purple Wraath in my opinion is unnecessary, but of course like I said, that is just my opinion.
06-07-2007, 10:22 AM
06-07-2007, 10:39 AM
06-07-2007, 11:37 AM
06-07-2007, 11:57 AM
06-07-2007, 12:28 PM
Serious Nutrition Solutions Representative
06-07-2007, 12:36 PM
06-07-2007, 01:08 PM
Ok there are already 4 things wrong with this study that was presented to me (I'm going off of what was copy and pasted b/c the link does not work):
1. The number of rats total was never stated. They could have used 5,10, or 100. There are just statistics thrown around to quantify gains. (MuscleTech does this shady angle all too well)
2. This piggybacks the first statement: What do they mean the results conclude ? Does 99% mean it concluded or just 51% ? I'm assuming they used the 'majority rule' which percentages are not stated (and neither were the # of rats used).
3. I don't know if you caught the 'ad libitum' statement that was there, but basically what the study is summing up is: 'rats were fed 50% of what they usually eat for one week, the the other 2 they were allowed to eat how ever much they wanted to.' The amount of intake should have been controlled the whole time.
4. Three weeks is not long enough to quantify the statement they are making.
So there you go.
06-07-2007, 01:20 PM
- 5'10" 220 lbs.
- Join Date
- Jan 2006
I will defend BCAAs because the anecdotal and personal evidence is so overwhelming. No supplement is necessary, but there is a definite hierarchy with BCAAs being in the top portion.
M.Ed. Ex Phys
06-07-2007, 03:00 PM
I've tried the Xtend refreshing watermelon version. Can anyone else comment on the other flavors ?
06-07-2007, 09:01 PM
06-07-2007, 09:47 PM
There are alot of things on the effectiveness of BCAAs. Not so much EAA or Glutamine. I started on Glutamin, still use it here and there, but BCAAs have definetly showed their worth and now their popularity/effectiveness. JUST ABOUT everyone on here is on Excell,Xtend,Purple Wrath or Bulk BCAAs.
06-07-2007, 09:53 PM
BCAA's all the way. It's not a new sexy supplement but it delivers results
06-08-2007, 03:12 AM
06-08-2007, 10:27 PM
06-08-2007, 10:42 PM
I don't use BCAAs because my study of their use suggests two things, one is that if one's whole protein intake is at the optimal 1.4 to 2.0g/kg bodyweight range, which mine usually is, they provide little or no additional anabolic benefit, and I believe that a throughout the day use has a negative reduction effect on Brain Dopamine and Norephephrine levels and I've never noticed any real workout stamina benefit from pre or during workout use.
This article pretty much sums up what I believe about them
BCAAs Supplement Profile
06-09-2007, 06:20 AM
Would there be any benefit to taking BCAA and EAA ?? Just to have all your bases covered,or is this a stupid idea ??
06-09-2007, 08:31 AM
I use BCAAs or EAAs during cardio & weights, and I also add 5-6g of Leucine to my post workout shake.
All three for me
06-09-2007, 06:30 PM
06-10-2007, 04:35 AM
06-10-2007, 09:09 AM
Are there any noticable strength gains when megadosing BCAA's or not really???
06-10-2007, 01:04 PM
25 grams out of 200 grams of bcaa's are great.
06-10-2007, 01:44 PM
06-10-2007, 01:50 PM
Protein aspects aside, don't underestimate how much mental focus and emotional strength can be negatively affected by a reduction in Dopamine and NE levels. BCAA used once a day, probably not a big deal in this area, used multiply, not good. That alone keeps me away from them.
06-10-2007, 03:31 PM
06-11-2007, 12:08 PM
nothing kills my libido like BCAA.
EAA and leucine don't seem to have the same effect
06-11-2007, 12:48 PM
Wow I am loving BCAA but have noticed that my libido and sleep have been MESSED up since I started them. This is going to be a hard decision on which is more important! As of today I am stopping the BCAA I think.
06-11-2007, 02:15 PM
Has anyone noticed EAAs messing up there libido or sleep?
I just read that 25grams of BCAAs per day should mess with libido or dopamine.
06-11-2007, 02:51 PM
06-11-2007, 03:19 PM
I just checked 100% whey protein and it contains EAAs including tyrosine(precursor to dopamine).
06-11-2007, 04:05 PM
06-11-2007, 04:08 PM
06-11-2007, 06:50 PM
It's no wonder the Members here are always on the hunt for the Superduper Libido Pooper Upper.
66% swearing by BCAA = Dopamine dropping = Prolactin Rising = Members getting limpy, the thrill is gone. It's probably not helping with "Game" either.
I don't know how true that simplistic formula really is, and I don't want to test it out, then I'll be thinking it's a lack of Test(osterone) issue.
06-11-2007, 06:55 PM
I use BCAA's quite a bit and have for some time. I think they make a major difference when trying to lean out in muscle preservation. I also like the convenience of being able to take them with me (capsules), when not using bulk in shakes.
I have NEVER experienced a problem sleeping, or issues with libido. That is a new one on me.
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