All About Vitamin D: Why Late Summer Is the Time to Check Your Levels

Sep 4, 2025
2 min read

Vitamin D is one of those nutrients we hear about often—but most people don’t realize just how essential it is for whole-body health. From immune resilience to hormone balance, mood, and even bone strength, vitamin D plays a role in hundreds of processes throughout your body.

Why Vitamin D Matters

Vitamin D isn’t just a “vitamin”—it actually acts more like a hormone. Every cell in your body has receptors for it, which means low levels can contribute to a wide range of symptoms, including:

Fatigue and low mood
Frequent colds or infections
Bone or muscle aches
Hormone imbalances
Trouble concentrating

Why Late Summer Is the Best Time to Test

You might assume your vitamin D levels are at their peak after months of sunshine—but for many people, that’s not the case. Here’s why this time of year is ideal for checking:

Sunlight isn’t enough for everyone. Factors like sunscreen use, time spent indoors, skin tone, and even age can impact how much vitamin D your body makes.
You’ll want to know before levels dip. As fall and winter arrive, less sun exposure means vitamin D levels naturally drop. Testing now gives you a chance to correct low levels before the darker months hit.
Functional ranges matter. Standard labs often flag results as “normal” even when your levels aren’t optimal. At Vitality, we look for functional levels that truly support your health—not just the minimum.

Functional Medicine Solutions

If your vitamin D levels are low, we’ll help you address it with a personalized plan that may include:

Supplementation in the right form (Vitamin D3 + K2 for better absorption and balance)
Nutrition strategies like adding fatty fish, egg yolks, and fortified foods
Lifestyle support to maximize healthy sun exposure when possible

The Bottom Line

Don’t wait until winter to think about your vitamin D. Testing now helps you stay ahead of fatigue, illness, and seasonal mood shifts—and it’s one of the simplest ways to protect your long-term health.

👉 At Vitality, we offer comprehensive testing and individualized plans to optimize your vitamin D (and so much more). Reach out today to schedule your visit and get ahead of the season.

If you haven’t joined our Private Facebook Group, please do HERE.

If you’re ready to take the next step in your journey toward optimal health, please contact us for a discovery call to see if our approach is right for you.