Optimal vitamin D levels are crucial for overall health, supporting bone strength, immune function, and mood regulation. In the Pacific Northwest (PNW), where sunlight is limited, especially during winter months, vitamin D deficiency is common. The region’s cloudy weather and northern latitude make it difficult for our bodies to produce sufficient vitamin D naturally. To maintain optimal levels, PNW residents often need to supplement with vitamin D3. Regular blood tests can help determine appropriate dosage, ensuring you reap the full benefits of this essential nutrient for your well-being. If you keep forgetting to take your vitamin D, one shot a month for 2-3 months can get your level up to optimal for the year.