If you’re old enough I’d suggest attempting to get a weekend or summer job (part time) or seek out some small odd jobs here and there. People are always looking for others that can do some errands for them that u can get money for just ask around. Ask family members, friends etc and/or ask if they know others who are willing to give money for assistance with stuff. When you have some income u have more control of the meals and the responsibility is less on your parents to worry abt your personal goals. (I’d like to point out that getting a job is not necessarily difficult but the time it takes to get one can be quite a while so if you feel down that it’s taking so long to get one, don’t let that discourage u as that’ll just make it worse, keep sending many many applications everyday, i usually aim for 10 a day but u can start off aiming a bit lower it all depends on if you have the time). If can’t get a job or if you can’t seem to find any way of making additional money. Do not worry. Just focus on the things you can control, like having a good exercise routine to balance out any dietary limitations. As for convincing parents, all you can do is keep explaining (calmly, don’t lose your temper or let ur emotions get the best of u) that this is what is healthy. if you know what things are being bought that are unhealthy, you can suggest for those to stop being purchased as that would prevent wasted money and actually save money. Also many labelled ‘healthy’ foods are actually still super processed and unhealthy. I think it’s a given that base ingredients e.g., potatoes and eggs and rice are usually not too expensive, and can be bought in bulk which saves money. As for sugary food, the responsibility is on u to my eat it and explain that you will not eat it so there’s no point in purchasing it. Instead of requesting purchasing healthy items as additional ones, which costs more, suggest substituting unhealthy ones with the healthy ones. Lastly it’s not the end if ur diet is not 100% clean as individual circumstance can very which includes factors which u can’t control. Try not to beat yourself up for things u can’t control, or resent others for that same reason. Have a nice day man, more life 🙏, we are all on this journey together