Stopped gluten. It really helped! Took a long time to re adjust and vitamins really helped especially b12.
I started eating a protein mix in the morning (more lean protein) mixed with powdered greens and a dash of beet and strawberry powder and 1/2 fresh apple. Add in bergamont citrus powder, b complex, d3 k2, collagen peptides, and a mushroom dried blend among other microdosed vitamins (1/4 or 1/2 of a pill of various other bcaas or herbs) Added fish oil, lycopene and carotene and a bit of piperine (pepper extract) to help absorption a couple times per week. I do take a multi vitamin as well at night with vit c and a cal mag zinc which really helps me relax. Took a couple weeks but I started feeling amazing, the spread of vitiligo slowed and I started slimming up. Changed up the metabolism drastically to sub proteinfor my chex mix in the am.

Cutting even gluten free carbs seemed to take the pressure off my system quite a bit.
I love dairy. Have heard it helps to quit it, but I drink 2.5 gallons a week which helps me stay hydrated. Lol not sure why but I eat calcium heavy. However, after quitting gluten I realized sensitivity to creamer. The organic milk is by far better as well.
I also eat 1 little slice of kerry gold pub cheese in the morning to feed the healthy gut biome. After reading on the variance of gut biome with vitiligo I thought that was important.
Try some changes to diet for a week or so and see how you feel as everyone is different.
If I eat a lot of oranges (its citrus harvest season here) I cut out vit c supplements. If I eat lots of salads I cut out the green powder for a day or two.
My diet has changed by trying to give my body what it needs for immune response to be healthier and taking it easier on my body with what I take in as far as carbs and heavy fats, though I do consume a large amount of chocolate. Lol Favorite thing about being an adult:)

Cutting out gluten and dairy were not realistic for me so I opted to work on healing my gut and removing lactose instead. This has worked well for me. Broad spectrum probiotics, digestive enzymes, collagen, and marshmallow root tea have helped a great deal with my gut issues. Drinking high protein lactose free milk such as Fairlife or lactose free Greek yogurt gives me no issues. I try to eat 100g of complete (meaning animal) protein each day which has boosted my metabolism. I workout 3x a week and eat/drink protein, EAAs, and collagen to build muscle and support my joints. I use protein powders that are clean and AI safe such as Rootcology’s Paleo Protein powder. Try not to eat out and to use anti-inflammatory oils at home when cooking. I supplement with antioxidants such as glutathione and green tea extract. I take D3/K2 daily and also Berberine which fixed my insulin resistance and helped me cut out sweets and maintain a healthy weight. I also drink a mix of greens powder and colostrum 3x a week or so. I juice carrots and cucumbers once a week and this stops my skin from burning in the sun. My vitiligo has slowed and I’ve noticed that my hair is growing better and my nails are stronger. I’m more energetic and building muscle after menopause. My bloodwork is excellent and my doc says I get healthier every year, lol.

I started eating mor vegetables

Go plant-based. Lose the excess weight and get some exercise. Buy organic when you can. No processed foods. No animal products period. If you have a leaky gut and animal protein get in your bloodstream your body could produce antibodies that through molecular mimicry, can attack your melanocytes. Eliminate alcohol. Reduce stress (can cause leaky gut). Ensure adequate B12 and vitamin D. This should halt additional lesions. Over time, you may get some color back.

Love your dietary improvements!