Cola vs diet cola for acne
Cola scores 65/100 (WARN) and diet cola scores 100/100 (GLOW) on SpotBite's Skin Score. Diet cola is the safer choice by 35 points, and the gap comes mostly from glycemic load.
Where the gap comes from
- Glycemic: Cola has glycemic load 24.6 (39 g carbs), Diet cola has 0 (0 g carbs). Faster sugar means more insulin, which can raise skin oil.
Evidence: Smith 2007 RCT (n=43): a low-glycemic-load diet for 12 weeks lowered acne lesion count by 23.5 on average, versus 12 on the control diet (study). All 13 sources.
Score breakdown, side by side
| Cola | Diet cola | |
|---|---|---|
| Glycemic (of 50) | GL 24.6 −34.7 | no carbs 0 |
| Dairy (of 25) | 0 g 0 | 0 g 0 |
| Inflammation (of 25) | 0 g sat · 0 g ω-6 0 | 0 g sat · 0 g ω-6 0 |
| Skin Boost (of 25) | 0 g ω-3 · low polyphenols 0 | 0 g ω-3 · low polyphenols 0 |
| Skin Score | 65 · WARN | 100 · GLOW |
Estimates for a typical serving. Real foods vary by brand and recipe.
Verdict
If you are acne-prone, diet cola is the better pick of the two. A 35-point gap is the kind of swap that can show up in your skin within a week or two.
Not medical advice. Both scores are for the food on its own. What you eat with it changes the result, and breakouts usually show up 3 to 7 days after a meal. Diet is one factor among many.
See your own pattern
Scan what you actually eat and SpotBite shows which foods line up with your breakouts a few days later. Free on iPhone and Android.