Why “No Sugar Added” Foods Can Still Raise Your Blood Sugar

The Hidden Sugar Problem

Walk through any grocery aisle and you’ll see “No Sugar Added” or “Low Carb” labels. Unfortunately, many of these foods still contain ingredients that quickly convert to glucose once digested. For patients struggling with fatigue, weight gain, or insulin resistance, these hidden sugars can be a major barrier to healing.

Common Hidden Sugars

Even if “sugar” isn’t on the label, your body may still see it:

  • Maltodextrin, rice syrup, or tapioca starch
  • Fruit juice concentrates
  • Agave, coconut sugar, honey, and maple syrup
  • “Natural sweeteners” like erythritol and sorbitol
  • Refined grains and starches (white flour, pasta)

Why It Matters

Excess glucose triggers insulin release, which promotes inflammation, fat storage, and even vein disease. In functional medicine, we view insulin as a powerful inflammatory peptide—and one of the key drivers of premature aging.

How “Sugar-Free” Foods Still Spike Insulin

Some artificial sweeteners trick the brain into thinking sugar is coming, leading to insulin secretion and cravings. Others, like maltodextrin, have a higher glycemic index than table sugar.

Strategies for True Blood-Sugar Control

  • Focus on whole foods: vegetables, lean proteins, healthy fats
  • Choose fiber-rich carbohydrates such as lentils or quinoa
  • Pair carbs with fat and protein to slow absorption
  • Avoid processed snacks labeled “keto” or “low carb” without checking ingredients
  • Support metabolism with magnesium, chromium, and berberine

From Sugar to Circulation

Hidden sugar consumption doesn’t only affect weight—it contributes to oxidative stress that weakens blood vessels. This is why we often see a connection between high-insulin diets and varicose or spider veins.

Functional Medicine Testing

At Sheen Vein in St. Louis, we evaluate fasting insulin, hemoglobin A1C, and inflammatory markers to design personalized nutrition plans that balance glucose naturally.

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