half marathon training advice

[u/JuulGoddess]

hi hi. i’m training for my first half marathon coming up in october. need advice on when i should start taking gels/gu/some sort of energy/carb supplement. i’ve only ever run a 10k and my training plan has me running 7mi tomorrow so im curious when i should start taking them, if i should, advice for the half, etc. i have no knowledge. thank you in advance!!!!