Supplement Prices Split: Magnesium Rose, Multivitamins Fell
Supplement prices moved in different directions by July 9: magnesium rose 32.7% while multivitamins fell 14.4% in CostInflation's retail data.
Supplement prices split instead of moving as one shelf by July 9. Magnesium supplements averaged 32.7% higher than June 24 in the markets with prices on both dates, while multivitamins averaged 14.4% lower.
That split matters because the broader Consumer Health Retail Goods Inflation basket still moved up. The category-level line can show pressure while individual supplement pages point in different directions.
The comparison covers store-bought consumer health retail goods in CostInflation’s public market areas. It tracks retail shelf prices, not product quality, safety, or health outcomes.
Supplement prices moved in opposite directions
Magnesium and melatonin were the clearest risers in the supplement group. Magnesium moved from $18.18 to $24.13 across 11 markets, while melatonin supplements moved from $7.80 to $9.25 across all 12.
Multivitamins and electrolyte powder moved the other way. Multivitamins fell from $12.33 to $10.55 across 11 markets, and electrolyte powder fell from $21.42 to $19.56 across all 12.
| Product | June 24 average | July 9 average | Change |
|---|---|---|---|
| Magnesium supplements | $18.18 | $24.13 | +32.7% |
| Melatonin supplements | $7.80 | $9.25 | +18.7% |
| Vitamin D supplements | $11.61 | $12.65 | +8.9% |
| Electrolyte powder | $21.42 | $19.56 | -8.7% |
| Multivitamins | $12.33 | $10.55 | -14.4% |
The wider health basket still rose
The full consumer-health retail basket averaged 8.7% higher from June 24 to July 9 across the nine markets with prices on both dates. The supplement pages explain why that rise was not shared evenly across every item.
Other retail health goods also moved higher over the same public window. Thermometers averaged 20.1% higher, adhesive bandages averaged 14.1% higher, and acetaminophen averaged 9.5% higher.
The cleaner shelf-level point is the directional split inside one familiar category. A shopper following supplements would have seen magnesium and melatonin move up while multivitamins and electrolyte powder moved down.
Vitamin D rebounded late
Vitamin D supplements landed in the middle of the June 24 to July 9 comparison, up 8.9% across the 10 markets with prices on both dates. That modest full-window number hides a sharper late move.
From July 2 to July 9, those same 10 markets moved from $10.06 to $12.65, a 25.8% rebound. That is why the July 9 chart shows vitamin D above its June 24 level even after an early-July dip.
The line is shorter than the full health basket, so the safer read is product-level movement in the public window rather than a long-term trend.
Watch the supplement shelf by product
The next useful check is whether the rising supplement lines stay concentrated in magnesium, melatonin, and vitamin D, or whether multivitamins and electrolyte powder turn back up.
Start with the Consumer Health Retail Goods Inflation page for the broad retail-health view. Then use the supplement pages for magnesium, melatonin, vitamin D, multivitamins, and electrolyte powder to see whether one product type is carrying the next move.