"For with what judgment you judge, you will be judged; and with the measure you use, it will be measured back to you." (Matthew 7:2)
If we look to criticize others, we internalize it ourselves. Negative thoughts about others are toxic thoughts to ourselves.
First, be honest. If you want to lose weight for Godly reasons, for health, for energy, to repent from possible gluttony, for husbands, to find a godly husband, (most important) to give glory to Him; then God is wherever you are to carry that burden. If your goal is to drive men wild, to lord it over other women in social settings, to feel superior, well, believe me, God knows and I highly doubt you will find much here.
Dieting almost always fails because so many of us approach it with an attitude of "I'm not good enough" as we are. Many beat ourselves up while mentally dangling seductive visions of ourselves born from today's culture. If we are in Christ, then the Holy Spirit is indwelling us, and we might be able to lie to ourselves about our motives but He knows us better than we do. So first and foremost, be honest with yourself. Once you have that, get ready to love yourself through Christ's eyes, which melts away that kneejerk reaction to toxic thoughts that cripple us. Toxic thoughts about ourselves and those around us. Anger, guilt, rebellion, there are so many reasons besides good taste that cause us to eat too much. My prayer is that all of us discover God's truths about how He sees us, about the love that He has for us, about His protection and strength in carrying the burden as we discover Him through our trials and the trials of others on this page.