Website readiness profile · Snapshot 23 October 2026
gnc.com
gnc.com's public homepage, certificate and DNS checked against 31 practices and compared with 613 Fitness & Health sites.
- Readiness index
- 63/100
- Ahead of
- 34%
- Practices observed
- 18/31
- Popularity band
- Top 50K
Fitness & Health median 67
of measured Fitness & Health sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: gnc.com. Thin bar: Fitness & Health peer median.
Enable
87/100
Peers 82
Harden
57/100
Peers 59
Accelerate
53/100
Peers 63
Recover
0/100
Peers 10
Priority fixes for gnc.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Harden
HTTP requests move to HTTPS
Observed: A request to http://www.gnc.com/ was not redirected to HTTPS.
Why it matters: Visitors who type the address or follow an old link start on unencrypted HTTP. A redirect moves them to the encrypted site before any cookies or form data are sent.
What to do: Add a permanent (301 or 308) redirect from every http:// URL to the same https:// URL at your CDN, load balancer or web server.
On Cloudflare: Turn on Always Use HTTPS under SSL/TLS > Edge Certificates.
96% of Fitness & Health peers do this. Limit: Measured for the homepage only, from one location, at the time of the check.
Priority 2 · Accelerate
Modern image formats in use
Observed: The homepage had 75 images and none used WebP or AVIF.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
On Cloudflare: Cloudflare Polish can convert images to WebP.
45% of Fitness & Health peers do this.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 3 · Accelerate
No render-blocking scripts in <head>
Observed: The homepage <head> loaded 6 external scripts without async or defer.
What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.
45% of Fitness & Health peers do this.
Guide: Control Third-Party Scripts Before They Control Your Page
Priority 4 · Accelerate
Offscreen images lazy-loaded
Observed: The homepage had 75 images and none used loading="lazy".
What to do: Add loading="lazy" to images below the fold. Do not lazy-load the main hero image, because that delays the largest visible element.
68% of Fitness & Health peers do this.
What gnc.com already does well
Practices fewer than half of Fitness & Health peers use.
- Referrer-Policy setReferrer-Policy present.33% of peers
- HSTS kept for at least a yearHSTS with a 365-day max-age.43% of peers
- DMARC policy enforces quarantine or rejectDMARC policy p=reject.44% of peers
What we saw
- Homepage checked
- https://www.gnc.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- GoDaddy, 198-day validity, expiring 2027-03-09
- CDN or edge
- Cloudflare, Fastly
- DNS operators
- Cloudflare
- HSTS
- max-age 365 days
- DMARC policy
- p=reject
- Homepage HTML
- 524 KB, gzip
- Images on homepage
- 75 (jpg 44, svg 27, png 12, gif 1)
Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.
Stack and providers
Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.
All 31 checks
Select a gap for the method and fix. How each check works
Not observed 13
- HTTP requests move to HTTPS
- Certificate lifetime of 100 days or less
- CAA records limit who can issue certificates
- DNSSEC signed
- security.txt published
- Content Security Policy present
- HTTP/3 advertised
- Modern image formats in use
- Offscreen images lazy-loaded
- No render-blocking scripts in <head>
- Reachable over IPv6
- Social preview image set
- Nameservers spread across providers
Observed 18
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Referrer-Policy set
- HTTP/2 negotiated
- HTML compressed
- Static files cached for 30 days or more
- robots.txt published
- XML sitemap discoverable
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Structured data present
- Page language declared
- At most one redirect to the homepage
Own gnc.com?
Re-run the checks after a change, or verify the site in a free workspace to save reports with history, compare against similar sites and competitors, and track a private action plan. What owners get.
Live status for this site: Status Is Down: gnc.com. This profile covers configuration only.