I feel I easily see the symptoms of too much sugar with much less sugar than most people (symptoms like acne, bad skin, sugar cash (but not diabetes), etc.) but have since lockdown reduced my sugar intake as I do have a sweet tooth.
I've calculated roughly the sugar intake of each day recently and I think it's around 18-20g of sugar (apparently recommended daily limit is 30g so I'm below that). This consists of:
2-3 fruit (usually mandarin and a handful of raspberries)
1 bar of dark (85%) chocolate
I know there's sugar in carbohydrates as well which I should count but I usually don't eat much carb anyway (except porridge).