5.4 sec in total
549 ms
4.4 sec
427 ms
Welcome to lef.com homepage info - get ready to check Lef best content right away, or after learning these important things about lef.com
Get clinically-studied, premium vitamins and supplements and lab tests from the people who’ve spent 40 years passionately pursuing healthy living.
Visit lef.comWe analyzed Lef.com page load time and found that the first response time was 549 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
lef.com performance score
name
value
score
weighting
Value2.0 s
85/100
10%
Value10.3 s
0/100
25%
Value7.5 s
26/100
10%
Value1,560 ms
13/100
30%
Value0.001
100/100
15%
Value18.3 s
3/100
10%
549 ms
72 ms
222 ms
94 ms
78 ms
Our browser made a total of 133 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Lef.com, 4% (5 requests) were made to Translate.googleapis.com and 2% (3 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (2.5 sec) relates to the external source Lifeextension.com.
Page size can be reduced by 1.4 MB (39%)
3.6 MB
2.2 MB
In fact, the total size of Lef.com main page is 3.6 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.
Potential reduce by 226.8 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 137.4 kB, which is 55% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 226.8 kB or 91% of the original size.
Potential reduce by 62.4 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Lef images are well optimized though.
Potential reduce by 420.6 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 420.6 kB or 54% of the original size.
Potential reduce by 700.4 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Lef.com needs all CSS files to be minified and compressed as it can save up to 700.4 kB or 84% of the original size.
Number of requests can be reduced by 72 (60%)
121
49
The browser has sent 121 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lef. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
www.lifeextension.com
549 ms
VisitorIdentification.js
72 ms
main.lef.min.css
222 ms
font-awesome.min.css
94 ms
animation.css
78 ms
third.lef.min.js
290 ms
jquery.waypoints.min.js
63 ms
header.lef.min.js
100 ms
CoveoJsSearch.Dependencies.min.js
223 ms
CoveoJsSearch_SearchBox.min.js
222 ms
pr_styles_review.css
68 ms
frameworks.lef.min.js
76 ms
addtocart.lef.min.js
97 ms
mobile-detect.min.js
8 ms
ld.js
25 ms
element.js
37 ms
oct.js
56 ms
app.lef.min.js
81 ms
main.lef.min.css
74 ms
analytics.js
30 ms
fbevents.js
131 ms
27 ms
lelogo-mobile.png
87 ms
leflogo_stayhealthy.ashx
89 ms
feboverstock_sale_banner.ashx
2107 ms
icon_NavVitamins.ashx
593 ms
mag2016_03.ashx
606 ms
iconhealthconcerns.ashx
1185 ms
aboutUsMainNavImg.ashx
126 ms
hp_subnavAd_shopHealth.ashx
699 ms
hp_subnavAd_vitamins.ashx
188 ms
hp_subnavAd_supplements.ashx
535 ms
hp_subnavAd_herbs.ashx
655 ms
hp_subnavAd_horomones.ashx
709 ms
hp_subnavAd_skinCare.ashx
711 ms
hp_subnavAd_diet.ashx
759 ms
16_GS_Skincare_Mainsite_Hero.ashx
822 ms
FebOverstock_2016_Mainsite_Hero.ashx
2004 ms
HPhero_Inflamation_Curcumin_01.ashx
1458 ms
LE_Premier_Hero_LearnMore.ashx
1207 ms
img_01907_small.ashx
887 ms
img_00407_small.ashx
943 ms
img_01713_small.ashx
996 ms
img_02014_small.ashx
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img_01982_small.ashx
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img_01426_small.ashx
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horizontal_banner_DRTV_02.ashx
1229 ms
subFeature_newProducts.ashx
1265 ms
subFeature_shopBestSellers.ashx
1289 ms
subFeature_Top12_v2.ashx
1443 ms
Video_SuperDigestiveEnzymes_01.ashx
1405 ms
dailynewsimg_disease
1638 ms
dailynewsimg_aging
1462 ms
art_whot_160316_home.ashx
1498 ms
hg_home_lht_blog_160316.ashx
1525 ms
art_whot_160314_home.ashx
2103 ms
homepage_protocol_Constipation.ashx
1550 ms
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collect
78 ms
fontawesome-webfont.woff
1657 ms
consumerAlertsFrontline.ashx
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font-awesome.min.css
1589 ms
collect
75 ms
115 ms
consumerAlerts_vitamins.ashx
1664 ms
nyptfTwG32o
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event
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consumerAlerts_research.ashx
1712 ms
ga-audiences
61 ms
translateelement.css
88 ms
main.js
121 ms
www-embed-player-vflfNyN_r.css
33 ms
www-embed-player.js
75 ms
base.js
92 ms
adsct
248 ms
adsct
223 ms
element_main.js
230 ms
Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js
131 ms
ad_status.js
224 ms
Arimo_Normal.woff
1999 ms
zN7GBFwfMP4uA6AR0HCoLQ.ttf
99 ms
RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf
100 ms
translate_24dp.png
84 ms
l
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cleardot.gif
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Arimo_Bold.woff
1665 ms
consumerAlerts_testtubes.ashx
1403 ms
hpBtmAdUnit_DPT.ashx
1523 ms
te_ctrl3.gif
11 ms
am.png
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ap.png
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bn.png
2012 ms
100guaranteedwh.ashx
2453 ms
nsfsealwh.ashx
1388 ms
bbbsealwh.ashx
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lequalitysealwh.ashx
1315 ms
stars_small.png
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sprites.png
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ajax-loader.gif
1186 ms
animation.css
558 ms
roundtrip.js
11 ms
dis.aspx
37 ms
fetch.tg
181 ms
123
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107 ms
sync
90 ms
bidder_id=75565&bidder_user_id=83cce6f0-1d47-4b73-9eed-d142f9a318ff
55 ms
ad
80 ms
rtset
64 ms
Pug
57 ms
sync
86 ms
setuid
78 ms
spp.pl
101 ms
u.php
101 ms
pixel
119 ms
ZQ57MKE6QNDJNPSYYHLOMQ.js
164 ms
create.php
49 ms
tap.php
14 ms
match
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362338.gif
25 ms
retarget
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mapuser
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set
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xuid
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tap.php
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397596.gif
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sync
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create.php
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pixel
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cookiematch.aspx
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cookiematch.aspx
19 ms
cookiematch.aspx
12 ms
lef.com accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-*] attributes do not match their roles
[role]s do not have all required [aria-*] attributes
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Buttons do not have an accessible name
Links do not have a discernible name
lef.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
lef.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lef.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Lef.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
lef.com
Open Graph description is not detected on the main page of Lef. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: