Is Vitamin D Trending?

What the data shows

Search interest in Vitamin D has risen over the period: the yearly high moved from 77 in 2021 to 100 in 2025, which is also the high point of the whole series, set in November 2025.

• Peak interest: November 2025 (index 100)
• Recent level (last 12 weeks): index 92 of 100
• Change, first vs. latest 12 months: +19%
• Period covered: March 2021 – March 2026

Values are Google's relative search index, where 100 is the highest point in the period — not absolute search volume.

About Vitamin D

Vitamin D is among the largest and longest-established supplement categories in the world, consistently placed in the top handful of best-selling ingredients globally. It is the kind of product whose awareness phase finished a long time ago.

That maturity is legible in the shape of the data, and it is why this page is worth reading next to the newer entries in this dataset. Vitamin D has grown roughly 19% over five years — the most modest figure among the health and supplement trends covered here. But it starts from an index in the high sixties, whereas a term like eriomin starts from zero. A category that begins near the top of its own range has limited room to post dramatic percentages, and a low growth rate from a high base is a signature of maturity rather than weakness.

The category has continued to expand nonetheless, and the expansion has moved from awareness to formulation. The direction of travel is away from single-ingredient commodity products and towards combinations, with D3 paired with K2 as the dominant pairing; towards algae-derived D3 aimed at plant-based buyers; and towards delivery formats — sprays, gummies, liposomal preparations — that create differentiation where the underlying molecule offers none. Fortified foods and drinks act as a secondary channel, and regulatory attention to dosage, purity and labelling has increased alongside.

The practical consequence for anyone operating in this category is that the competitive ground has shifted entirely. Nobody needs to be told what vitamin D is, so there is no advantage left in explaining it; differentiation now happens on formulation, format and certification. Note also that this is a northern-hemisphere-weighted market with a genuine winter skew, so a single reading taken in November will always flatter the trend relative to one taken in June.

More in Health

Compare Vitamin D with other health trends.