Reading this again, I am reminded of the difference between a bull and a bullock. This article is a load of the difference.
I saw the article this morning. Apart from poor proof reading when I read it (400 people instead of 400 million) there didn't seem to be much logic. Oh, and it starts with the phrase "
The days of the insulin pen may be numbered" and then goes on to not talk about insulin pens at all.
The implant released GLP-1 which is normally available by injection. However there are long lasting variants which only require injection once a week. See
https://www.diabetes.co.uk/diabetes-medication/incretin-mimetics.html.
So perhaps a relatively small subset of T2s who are beyond all oral medication but not yet on insulin?
The thing that really confused me was the strategy of triggering the dose by caffeine. I assume that you are on a fixed dose each day, not a variable dose controlled by testing. The implication of this is that you would have to have caffeine labelling of all food and drink, and caffeine counting applications on your mobile, to make sure that you get enough, but don't overdose. Imagine finding that you were seriously overdosing by accident because you hadn't realised that there was caffeine in a product.
Not the thing for long distance truck drivers (who allegedly have quite a high incidence of T2) if they are on Red Bull and multiple Espressos just to keep their eyes open.
This looks like a punt for more research grants.
In their defence, I can see that as a two stage strategy where you need to release a drug into the tissues or blood stream because it can't be taken orally, then having an implant and triggering it with a measured dose of another compound which can be taken orally and then passes into the blood stream can change regular injections into just taking pills.
However caffeine is in all sorts of things, so I don't think it is a suitable compound to use as a trigger.
Edit:
I am assuming that author of this piece knows very little about Diabetes. Or got very confused. Or left bits out by mistake.
There is a link at the bottom to a much earlier article
https://www.theguardian.com/science...t-could-eliminate-need-for-insulin-injections
where there is an implant which releases insulin, removing the need for injections.
Combining the chemical trigger and an insulin (not GLP-1) implant could give T1s and insulin dependant T2s a way of dosing with insulin without injections. However as far as I can see you would still have to test and decide how many pills to take.