I have just read that taking Collagen whilst taking hormone blockers post breast cancer treatment isn't a good idea. I am surprised about this. At my oncologist appt post surgery I took all the supplements I had been taking previously and asked him if they were ok. He said he was happy for me to take them.
I had trawled through the internet to find out what food and spices etc to avoid but nothing mentioned collagen. I am surprised but it's not the only thing he got wrong. He was glib and a bit arrogant. For someone who is a Professor and at the centre of treatments for cancer I am doubly surprised.
Hi
That doesn’t sound very helpful of him ! He sounds rude !
I have started taking marine collagen after my oncologist and BCN told me they took it and we then had a chat about the benefits. I’m on Prostap and letrozole and it was deemed to be fine for me according to onco . Is it maybe the tamoxifen that’s the issue as opposed to hormone blockers generally ?
xx
Thank you at least that's something positive. It's good to reread things. So many things it seems are not great for cancer. I've had two really really nice dinners with lots of meat. And wine. Glad I didn't do this reading before I enjoyed them. X
Oh absolutely, I’ve tried to stop reading too much , I end up down a rabbit hole and anxiety levels sky high . I’m glad you had some lovely dinners , well deserved I say
Cheers
xx
Never regret that which one enjoys. Too much time spent being sensible.
did some reading on this and some (studies on collagen and cancer) say that because breast cancer travels on collagen, certain callogens are considered not a good idea, and those are the ones you get in meats and cow collagen.
however no one has actually found a definitive link that taking it increases the spread or any other possible linking, its all theoretical. not to mention we need to consume collagen as part of our diets to remain healthy.
" The role of collagen is a double-edged sword in cancer. On the one hand, collagen, cancer cells, other cells, and other matrix molecules mutually form an inter-reinforcing loop. This loop contributes to the development of cancer by inducing cancer cells proliferation, migration, and metastasis. On the other hand, preclinical and clinical studies have demonstrated that collagen may slow the development of cancer cells to some extent under some conditions. In summary, the association of collagen with cancer is only partially understood, and future studies are needed to elucidate detailed collagen biological mechanisms in cancer tissue that can be applied to precisely regulate collagen balance to achieve the maximum benefit of treatment.“
so i assume he is not going to c9me down on either side because it is not fully understood
That does sound surprising and a bit frustrating. I'd say a second opinion might be worth considering, especially with something as crucial as post-cancer treatment. Sometimes, it's good to cross-check with another expert to ensure you're on the safest path. And read the info in this guide https://fitnessclone.com/review-center/ before deciding to get any supplements. I wish you all the best on your recovery journey!
Whatever cancer throws your way, we’re right there with you.
We’re here to provide physical, financial and emotional support.
© Macmillan Cancer Support 2025 © Macmillan Cancer Support, registered charity in England and Wales (261017), Scotland (SC039907) and the Isle of Man (604). Also operating in Northern Ireland. A company limited by guarantee, registered in England and Wales company number 2400969. Isle of Man company number 4694F. Registered office: 3rd Floor, Bronze Building, The Forge, 105 Sumner Street, London, SE1 9HZ. VAT no: 668265007