I am sorry to hear of your friends brother.
An ex of mine has (imo) an alcohol problem (hence him being an ex), but he very vehemently disagrees with this. It's just that he likes alcohol and makes him the life of the party etc etc.
Just after we broke up he told me he'd had his work medical done and was referred to gp. He was put onto meds as was borderline diabetic, cholesterol was too high and some other ailments. But he brushed it off as in he had to agree to the meds to pass the work medical. I asked if the dr asked how many units he drank each day, said no he didn't ask so obvs it's not an issue. So I thought ok then, but I know it is a factor in these now sudden health issues.
It's been a few years now, and he posted a photo of himself on SM a few weeks ago, and I was shocked when I saw it. I thought he'd picked up weight, but as I looked closer he appeared swollen or bloated all over, but the thing that alarmed me the most, is his colouring. He looks jaundiced, like a deep yellow colour.
I suppose it stood out to me as I hadn't seen him in a while. Clearly there has been no change alcohol wise as in the photos he's got a glass in his hand, a dinner photo with a full wine glass and an empty glass in the picture.
So in 3 years he's gone from normal healthy, to diabetic with other health issues to now looking like he has some real visible liver damage.
It's actually quite scary if I look at the timeline. As three years is not a long time really. But in his case, 3 years has had a major impact.
I think people don't realise the effects, until it's too late. Sadly some don't realise the effects even after it's too late.