Updated July 2026 · General educational information, not medical or legal advice.
This trips people up, so it is worth explaining properly. When you enter a code at checkout, the store looks it up in its own database of promotions. That database belongs to the business, not to the domain name pointing at it. Changing the address is closer to a company changing its street sign than to opening a different company — the shelves, the till and the promotions all carry over.
The same logic covers referral and affiliate links. We tested an affiliate-tagged link on the old address on 28 July 2026 and the forward carried the tag through to the new domain intact.
| Item | Affected by the domain change? |
|---|---|
| HEALTHYLIFE10 discount code | No — applies at checkout as before |
| Saved product links | No — the old address forwards and keeps the full link |
| Referral and affiliate tags on a link | No — carried through the forward |
| Your bookmarks | Working today, but worth re-saving before the forward is retired |
| Published lab results | No — same catalogue, same published batch results |
When a code fails at checkout, people reach for the most recent change they can remember and blame it. Since the address change is the visible recent event, it gets the blame. It is almost never the cause. The usual reasons a code will not apply are far more boring:
Our view on why so many listed codes fail in the first place is set out in our check on whether HEALTHYLIFE10 is a valid code.
Go to growthguys.com, add what you want to the cart, and enter HEALTHYLIFE10 in the discount field at checkout. Confirm the 10% actually appears in the order summary before you pay — that on-screen confirmation is the only proof that counts, on any store.
One practical note for late July 2026: the store is currently showing a notice that credit and debit checkout is temporarily affected, with a stated expectation of being resolved by August. If a card is how you prefer to pay because it may give you a dispute path, waiting is a reasonable call. A temporary outage is never a good reason to rush into a payment method you cannot walk back.
New to the address change? Start with what changed and how to verify the real site.
Affiliate disclosure: I may earn a small commission if you use my code, at no extra cost to you. For research and educational purposes only. Not medical advice.
Get 10% off with code HEALTHYLIFE10 →