The American Academy of Dermatology reports an association between high-glycemic foods and acne, which may be due to its effect on hormone levels. As a concentrated source of sugar, juice is usually a high-GI food, which makes it less than ideal if you're acne-prone. But some juices, including tomato, vegetable and unsweetened apple juice, have a low GI, which means they can fit into an acne-friendly diet. Consult your doctor to help you design a diet plan that fits your needs.
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Depending on the type, the GI for tomato juice ranges from 23 to 38 -- well below the upper limit of 55 for low-GI foods. To make sure you're making the best choice for your skin, look for varieties that have no added sugar. Tomato juice is also a source of vitamin A, meeting 10 percent of the daily value per serving. The fat-soluble vitamin is important for skin health and may help improve acne. However, tomato juice may be a source of sodium, with 680 milligrams per 8 ounces. Look for low-sodium varieties to help limit your intake.
Vegetable juice is also a low-GI juice, with a GI of 43. Vegetable juice is also a good source of vitamin C, meeting 120 percent of the daily value, the same amount found in tomato juice. It is, however, a better source of vitamin A than tomato juice, meeting 40 percent of the daily value per 8-ounce serving. A 2010 article published in the Journal of the American Academy of Dermatology reports that it's not yet known how antioxidants such as vitamin C help people with acne, but these types of nutrients may also play a role.
Unsweetened Apple Juice
It may be naturally sweet, but unsweetened apple juice also has a low GI, ranging from 37 to 44, and may be a good juice choice for those with acne. Look for cloudy unsweetened apple juice for the lowest GI. Apple juice is also a source of vitamin C, meeting 10 percent of the daily value per 8-ounce serving. However, unsweetened apple juice is higher in calories than the two vegetable juices, 114 calories versus 51 calories per 8-ounce serving of tomato or vegetable juice.
Make Your Own
To up the nutritional quality and keep GI low, you may consider making your own juice for acne. Consider blending kale, tomato and celery for a low-GI juice that's also rich in vitamins A and C. Or try cucumber, spinach and carrot with ginger. You also may be able to slow digestion of your juice by adding some of the pulp to your blend, which may help prevent spikes in insulin. This may be especially helpful if you're making fruit juice. A healthy juice blend with fruit might include apples, carrot and lemon or mango, pineapple and kale.