You can get the benefits that you are looking for simply by supplementing with collagen powder or the individual amino acids that are found in high quantities in collagen and bone broth but not in meat.

I’d recommend supplementing with hydrolyzed collagen powder to get the amino acids mentioned in this article that help with IGF-1 levels (glycine) and healing the gut (glutamine).

As far as dosage goes, 3-5 grams of glycine seems to be ideal, and taking more is not harmful at all (some sources even recommend taking 3-5 grams at every meal). And to help heal the gut, 2-5 grams a day of glutamine is usually recommended.
If you end up purchasing a collagen supplement, check out the listed amino acid content on the packaging. It will tell you how much of each amino acid you will get from each serving. You can use this to help you figure out the minimum dose you’d like to take every day.

I’m not sure what supplements are available in the UK, but if you can find collagen peptides, hydrolyzed collagen, or collagen hydrosylate, I recommend purchasing that.

Another good source of glycine, proline, and glutamine (the amino acids that I talk about in this article) is animal skin. Chicken skin, for example, is an especially tasty way to get more of those amino acids in.

Does that all make sense? If you have any questions, please let me know.

If you need any help with anything, let me know.