I honestly have never ate a chestnut but I am a big advocate of all things in moderation.
If god made it - it's good for you
If it comes in a box and has a big ingredient list - chances are it's not the best for you.
Here is the nutrition facts for chestnuts. They are very high in carbs so I would treat them as a carb source.
[TABLE="class: _yX, width: 2"]
[TR="class: kno-fb-ctx"]
[TD="class: _rhe"]Amount Per 1 oz (28.4 g)100 grams100 grams
[/TD]
[/TR]
[TR="class: kno-fb-ctx kno-nf-cq"]
[TD]Calories 131[/TD]
[/TR]
[/TABLE]
[TABLE="class: _yX, width: 2"]
[TR="class: _fDd"]
[TD="class: _VLb, colspan: 2, align: right"]% Daily Value*[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Total Fat 1.4 g[/TD]
[TD="class: ellip _Igc, align: right"]2%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip _hDd"]Saturated fat 0.3 g[/TD]
[TD="class: ellip _Igc, align: right"]1%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip _hDd"]Polyunsaturated fat 0.5 g[/TD]
[TD="class: ellip _Igc, align: right"][/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip _hDd"]Monounsaturated fat 0.5 g[/TD]
[TD="class: ellip _Igc, align: right"][/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Cholesterol 0 mg[/TD]
[TD="class: ellip _Igc, align: right"]0%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Sodium 27 mg[/TD]
[TD="class: ellip _Igc, align: right"]1%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Potassium 715 mg[/TD]
[TD="class: ellip _Igc, align: right"]20%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Total Carbohydrate 28 g[/TD]
[TD="class: ellip _Igc, align: right"]9%[/TD]
[/TR]
[TR="class: kno-nf-nr"]
[TD="class: ellip"]Protein 2 g[/TD]
[TD="class: ellip _Igc, align: right"]4%[/TD]
[/TR]
[/TABLE]
[TABLE="class: _yX _RXc, width: 2"]
[TR]
[TD="class: ellip"]Vitamin A[/TD]
[TD="class: ellip _Igc _gDd kno-nf-nh, align: right"]0%[/TD]
[TD="class: ellip"]Vitamin C[/TD]
[TD="class: ellip _Igc kno-nf-nh, align: right"]44%[/TD]
[/TR]
[TR]
[TD="class: ellip"]Calcium[/TD]
[TD="class: ellip _Igc _gDd kno-nf-nh, align: right"]4%[/TD]
[TD="class: ellip"]Iron[/TD]
[TD="class: ellip _Igc kno-nf-nh, align: right"]9%[/TD]
[/TR]
[TR]
[TD="class: ellip"]Vitamin D[/TD]
[TD="class: ellip _Igc _gDd kno-nf-nh, align: right"]0%[/TD]
[TD="class: ellip"]Vitamin B-6[/TD]
[TD="class: ellip _Igc kno-nf-nh, align: right"]10%[/TD]
[/TR]
[TR]
[TD="class: ellip"]Vitamin B-12[/TD]
[TD="class: ellip _Igc _gDd kno-nf-nh, align: right"]0%[/TD]
[TD="class: ellip"]Magnesium[/TD]
[TD="class: ellip _Igc kno-nf-nh, align: right"]13%[/TD]
[/TR]
[/TABLE]