Denver Dries: Altitude Lies About Enzyme Savings?

By Franklin Everett Shaw

January 18, 2026

Forget everything you think you know about making jerky in Denver. You’ve probably heard whispers about how the mile-high altitude magically preserves enzymes in your homemade snacks, leading to a nutritional goldmine. It’s time to face the facts: that’s mostly wishful thinking.

The idea stems from the fact that water boils at a lower temperature at higher altitudes. In Denver, water boils around 202°F (94°C) instead of the standard 212°F (100°C). The (flawed) logic goes that this lower temperature is gentler on enzymes, preserving them during dehydration.

Let’s dissect this myth, Denver-style.

Enzymes are proteins, and proteins are notoriously sensitive to heat. While it’s true that lower temperatures can be less damaging, the temperatures used in food dehydration, even at Denver’s altitude, are still high enough to denature (damage) many enzymes.

Think of it like cooking an egg. A gentle simmer might leave the yolk runny, but a hard boil will solidify it completely. Enzymes are similar; they have an optimal temperature range, and exceeding it, even by a little, can render them inactive.

So, does altitude completely negate enzyme activity? Not necessarily. Some enzymes are more heat-stable than others. However, the difference in boiling point between sea level and Denver is unlikely to make a significant difference in overall enzyme preservation during dehydration.

Here’s the kicker: even if you did manage to preserve a significant amount of enzymes, their impact on nutrient bioavailability in dried foods is often overstated. Many enzymes are involved in digestion, but your own body produces plenty of those. The enzymes in your jerky aren’t going to revolutionize your nutrient absorption.

Let’s look at some real-world examples. Imagine you’re making beef jerky. The primary goal of dehydration is to remove moisture, inhibiting bacterial growth and extending shelf life. The USDA recommends cooking meat to a minimum internal temperature of 160°F (71°C) before dehydration to kill harmful bacteria like E. coli.

Even if you dehydrate at a lower temperature after that initial cooking, the damage to enzymes has already been done. The initial heat treatment is far more impactful than the slight difference in boiling point at altitude.

Fruit leather is another common example. While fruits contain enzymes that contribute to their ripening and flavor development, these enzymes are often deactivated during the pureeing and heating process that precedes dehydration.

Furthermore, the acidity of many fruits naturally inhibits enzyme activity. So, even if you dehydrate your Colorado peaches at a low temperature, the enzyme benefit is likely minimal.

Now, let’s talk about the challenges and pitfalls. One common mistake is assuming that low-temperature dehydration is always better. While it might sound appealing for enzyme preservation, it can actually increase the risk of spoilage.

If the food isn’t dried quickly and thoroughly enough, bacteria and mold can thrive, leading to a potentially dangerous product. This is especially true at higher altitudes where the air is drier, but the lower boiling point can paradoxically slow down the initial stages of moisture removal.

Another pitfall is relying on anecdotal evidence or unsubstantiated claims. Just because your neighbor swears their altitude-dried apples are bursting with enzymes doesn’t make it true. Always look for scientific evidence to back up any claims about food preservation or nutrition.

So, what actually works for food preservation at high altitudes in Colorado? Focus on proven methods that prioritize safety and effectiveness.

Here are some actionable insights:

• Temperature Control: Use a dehydrator with precise temperature control. Aim for temperatures that are high enough to inhibit microbial growth but not so high that they scorch the food. A range of 130-160°F (54-71°C) is generally recommended for fruits and vegetables. For meat, ensure it reaches a safe internal temperature before and during dehydration.
• Air Circulation: Ensure good air circulation within your dehydrator. This helps to remove moisture evenly and prevent hot spots.
• Pre-Treatment: Consider pre-treating fruits and vegetables to prevent browning and improve texture. Blanching (briefly boiling) vegetables can also help to reduce enzyme activity and prevent undesirable changes during storage.
• Proper Storage: Store dehydrated foods in airtight containers in a cool, dark, and dry place. This will help to prevent moisture absorption and extend shelf life.
• Don’t Skip the Science: Understand the science behind food preservation. Read reputable sources and consult with food safety experts to ensure you’re using safe and effective methods. Colorado State University Extension offers excellent resources on food preservation at high altitudes.

Instead of chasing the elusive “enzyme savings,” focus on the fundamentals of safe and effective food dehydration. Prioritize food safety, proper techniques, and reliable information. Your taste buds (and your stomach) will thank you.