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Three and six grams supplementation of d-aspartic acid in resistance trained men

Overview of attention for article published in Journal of the International Society of Sports Nutrition, April 2022
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (98th percentile)
  • High Attention Score compared to outputs of the same age and source (93rd percentile)

Mentioned by

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26 news outlets
blogs
3 blogs
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45 X users
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13 Facebook pages
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1 Wikipedia page
reddit
1 Redditor
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12 YouTube creators

Citations

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24 Dimensions

Readers on

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62 Mendeley
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Title
Three and six grams supplementation of d-aspartic acid in resistance trained men
Published in
Journal of the International Society of Sports Nutrition, April 2022
DOI 10.1186/s12970-015-0078-7
Pubmed ID
Authors

Geoffrey W Melville, Jason C Siegler, Paul WM Marshall

Abstract

Although abundant research has investigated the hormonal effects of d-aspartic acid in rat models, to date there is limited research on humans. Previous research has demonstrated increased total testosterone levels in sedentary men and no significant changes in hormonal levels in resistance trained men. It was hypothesised that a higher dosage may be required for experienced lifters, thus this study investigated the effects of two different dosages of d-aspartic acid on basal hormonal levels in resistance trained men and explored responsiveness to d-aspartic acid based on initial testosterone levels. Twenty-four males, with a minimum of two years' experience in resistance training, (age, 24.5 ± 3.2 y; training experience, 3.4 ± 1.4 y; height, 178.5 ± 6.5 cm; weight, 84.7 ± 7.2 kg; bench press 1-RM, 105.3 ± 15.2 kg) were randomised into one of three groups: 6 g.d(-1) plain flour (D0); 3 g.d(-1) of d-aspartic acid (D3); and 6 g.d(-1) of d-aspartic acid (D6). Participants performed a two-week washout period, training four days per week. This continued through the experimental period (14 days), with participants consuming the supplement in the morning. Serum was analysed for levels of testosterone, estradiol, sex hormone binding globulin, albumin and free testosterone was determined by calculation. D-aspartic acid supplementation revealed no main effect for group in: estradiol; sex-hormone-binding-globulin; and albumin. Total testosterone was significantly reduced in D6 (P = 0.03). Analysis of free testosterone showed that D6 was significantly reduced as compared to D0 (P = 0.005), but not significantly different to D3. Analysis did not reveal any significant differences between D3 and D0. No significant correlation between initial total testosterone levels and responsiveness to d-aspartic acid was observed (r = 0.10, P = 0.70). The present study demonstrated that a daily dose of six grams of d-aspartic acid decreased levels of total testosterone and free testosterone (D6), without any concurrent change in other hormones measured. Three grams of d-aspartic acid had no significant effect on either testosterone markers. It is currently unknown what effect this reduction in testosterone will have on strength and hypertrophy gains.

X Demographics

X Demographics

The data shown below were collected from the profiles of 45 X users who shared this research output. Click here to find out more about how the information was compiled.
Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 62 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 1 2%
Unknown 61 98%

Demographic breakdown

Readers by professional status Count As %
Student > Master 9 15%
Student > Bachelor 8 13%
Researcher 6 10%
Lecturer 4 6%
Professor > Associate Professor 4 6%
Other 11 18%
Unknown 20 32%
Readers by discipline Count As %
Sports and Recreations 10 16%
Nursing and Health Professions 6 10%
Medicine and Dentistry 5 8%
Biochemistry, Genetics and Molecular Biology 4 6%
Agricultural and Biological Sciences 4 6%
Other 10 16%
Unknown 23 37%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 261. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 07 January 2024.
All research outputs
#138,007
of 25,248,299 outputs
Outputs from Journal of the International Society of Sports Nutrition
#56
of 945 outputs
Outputs of similar age
#4,407
of 437,448 outputs
Outputs of similar age from Journal of the International Society of Sports Nutrition
#55
of 850 outputs
Altmetric has tracked 25,248,299 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 945 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 63.4. This one has done particularly well, scoring higher than 94% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 437,448 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 98% of its contemporaries.
We're also able to compare this research output to 850 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 93% of its contemporaries.