Too much B3 on whole food diet

Hi there - I need to eat quite a lot of calories for maintenance, typically over 3000. I also look for a large protein intake (c.120g) to support my exercise.

If I'm not very careful it's very easy to go over the upper limit for B3. 100g of chicken and a medium sized baked potato already brings me to 100 of the RDA. Add in 40g peanuts, 30g sunflower seeds and some sweet potato and I'm knocking on the door of the upper limit.
I'm generally very fit and healthy. If I take out meat and swap for veg based protein then I end up going way over the manganese upper limit.

How worried should I be about these upper limits, it seems all too easy to go over them if I'm eating a lot of calories.



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