3.1 sec in total
325 ms
2.5 sec
285 ms
Visit centrum.co.uk now to see the best up-to-date Centrum content for United Kingdom and also check out these interesting facts you probably never knew about centrum.co.uk
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Visit centrum.co.ukWe analyzed Centrum.co.uk page load time and found that the first response time was 325 ms and then it took 2.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
centrum.co.uk performance score
name
value
score
weighting
Value4.0 s
23/100
10%
Value7.6 s
3/100
25%
Value7.4 s
28/100
10%
Value1,580 ms
12/100
30%
Value0.023
100/100
15%
Value11.4 s
19/100
10%
325 ms
161 ms
155 ms
153 ms
232 ms
Our browser made a total of 80 requests to load all elements on the main page. We found that 80% of them (64 requests) were addressed to the original Centrum.co.uk, 8% (6 requests) were made to Secure.adnxs.com and 4% (3 requests) were made to Centrum.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Centrum.co.uk.
Page size can be reduced by 1.2 MB (20%)
5.9 MB
4.8 MB
In fact, the total size of Centrum.co.uk main page is 5.9 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. 60% of websites need less resources to load. Images take 5.2 MB which makes up the majority of the site volume.
Potential reduce by 134.0 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 134.0 kB or 81% of the original size.
Potential reduce by 584.8 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. Obviously, Centrum needs image optimization as it can save up to 584.8 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 318.8 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 318.8 kB or 74% of the original size.
Potential reduce by 130.9 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. Centrum.co.uk needs all CSS files to be minified and compressed as it can save up to 130.9 kB or 84% of the original size.
Number of requests can be reduced by 24 (33%)
73
49
The browser has sent 73 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Centrum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
www.centrum.co.uk
325 ms
css__bnq8b_OulPLQyiyFpKJOkyQ8lwRev_cqS7-xvbYjvU.css
161 ms
css_KuNYbSQ5MxTQYHq8Q7AnCqWLoCDMGXyniYfe7Dn0ffo.css
155 ms
css_BtA8-k0iE-2vsaF54NtY9-KClE76xSnsH8gm4hQs2S4.css
153 ms
css_TycNZ5A-f2NYmGDhwNLoR2bU3s9mBZcr5vwByv0Ogqs.css
232 ms
js_UWQINlriydSoeSiGQxToOUdv493zEa7dpsXC1OtYlZU.js
231 ms
js_5YTpbwIc6NGXpd7ce4zZjFlB-WcQVGkfcTK9TLYSMO4.js
257 ms
js_YG9iNFoZJhIwhvol97LI8rEdRA3ik8-0CzOCELmjHVQ.js
227 ms
js_mE9GBGqx0XtM_Ppnf9_btNZiCYpjEruzIguassTqT-c.js
229 ms
9928d536-f893-4bdc-a1a7-22e11f6386b8.js
55 ms
js_Y1_ClShpS_ozWPqkjr1zRG8oztYTnIXxLzKrCkFdols.js
254 ms
analytics.js
135 ms
gb.png
533 ms
ca.png
422 ms
us.png
484 ms
bkg-container-top.png
225 ms
bkg-body.png
224 ms
bkg-header.png
223 ms
logo-centrum.png
222 ms
free_sample_centrum_header.png
224 ms
Cent_Advance-30-AS-HR_1.png
221 ms
Cent_Gender-Men-30-AS-HR_thumb.png
305 ms
Cent_Gender-Woman-30-AS-HR_thumb.png
304 ms
Cent_Fruity-Chewable-30-AS-HR_1.png
305 ms
Cent_Advance-50%2B-30-AS-HR_1.png
296 ms
Cent_men50-listening.png
297 ms
Cent_women50-listening.png
297 ms
Cent_Kids-Chewable-30-AS-HR_1.png
371 ms
pre-pregnancy.png
374 ms
during-pregnancy.png
374 ms
post-pregnancy.png
375 ms
Performance-30s_1.png
381 ms
hub-formula-finder.png
383 ms
hub-vitamins.png
446 ms
hub-body-map.png
447 ms
hub-benefits.png
447 ms
home-woman-men_border.png
750 ms
marquee_background_html_blue.png
463 ms
Cent_men50-marquee-1_1.png
541 ms
Cent_women50-marquee_0.png
596 ms
Centrum_homepage_carousel_0.png
787 ms
marquee_background_html.png
522 ms
centum_line_up.jpg
1517 ms
bg-carousel-links.png
596 ms
home-woman-men2_border.png
782 ms
home03_1_right_1.png
818 ms
homepage-pregnancy-care.png
899 ms
background-violet.png
821 ms
1-homepage-pregnancy-products_new.png
946 ms
bkg_home_internal.png
859 ms
product-bkg.png
809 ms
collect
17 ms
9908cdad-7524-4206-819e-4f345a666324.woff
90 ms
2ef5ecda-1772-45e2-843f-a13f5d76ed3a.woff
119 ms
483a662e-88d8-4865-8dd3-1515c67fe28b.woff
167 ms
bkg_product_line_up2.png
687 ms
bkg_product_line_up.png
725 ms
fruit-chewable.jpg
760 ms
sprite-btns.png
837 ms
bkg-content-internal.png
763 ms
separator_menu_footer.gif
798 ms
bounce
16 ms
bounce
13 ms
bounce
18 ms
bounce
13 ms
bounce
12 ms
bounce
14 ms
bkg-right-menu.png
741 ms
overlay-bg.png
760 ms
sprite-menu-nav.png
764 ms
s71261267454829
43 ms
bkg-container-footer.png
796 ms
bt-products.png
814 ms
h3-line2.gif
828 ms
bkg-mega-navigation.png
762 ms
dot.jpg
763 ms
icon-contactus-phone.jpg
798 ms
icon-contactus-pen.jpg
824 ms
sprite-marquee-pager.png
829 ms
css_rnMAiXwINQTI90310tFU3HLOi5xyFS3Iwu-6AJvCl7Q.css
83 ms
centrum.co.uk accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
centrum.co.uk best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
centrum.co.uk 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
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Centrum.co.uk 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 Centrum.co.uk 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.
centrum.co.uk
Open Graph data is detected on the main page of Centrum. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: