'Interesting' is also a good one.
On the subject of diets I actually do think the whole subject is fascinating. Things have moved so far on from the calorie-counting doctrine and people are finding diets that work for them, listening to their bodies, having good nutrition etc. But a weight loss DRUG?? No thanks. And I would not trust the opinion/advice of professionals who are largely funded by drug companies. I have one word for all of that - thalidomide.
MI5 warns of right wing opinion shifting from anti-migrant opinion to terrorism
