Do supplement travel packs cost more per dose?
Yes, in every one of the 10 pairs we can compare. Per comparison dose, the packet runs from 1.2× to 2.5× the price of the smallest tub or bottle of the same product the brand sells here, before delivery.
Each pair is one brand, one product, one flavor where the name carries one, the same labeled forms where both records state them, and the same labeled strength for vitamin D. The tub is the smallest package of the product that brand sells here, so a bulk discount on a big tub counts against the packet as little as possible; against a bigger tub every multiple here would be larger. Every figure is per the category's comparison dose, named in each row, because a labeled serving is not the same size in a packet and a tub, and is computed from each package's own panel against its price.
2 packet products have no tub from the same brand to set beside them here, or no price per dose to compare: Animal Omega (30 packs), Micro Ingredients Multi Collagen Peptides Powder, Unflavored (40 packets).
What this does not tell you
What the convenience is worth. A packet is a measured dose that travels, and a tub is not; this page prices the difference and leaves the judgment to you. Delivery is not counted on either side, because a packet order and a tub order reach a free-delivery threshold differently; each product page shows the delivered figure where the retailer publishes a rate.
Package size. The multiple above is against the smallest tub; against the biggest tub the same brand sells, which usually costs less per dose, it would be larger, and that part of the gap is a bulk discount rather than the price of a packet. Every package here is on its category page with its label read.
Every category we compare: the home page. Every question we answer: the question index.
What this rests on: prices we last recorded at the retailer named on each product page, which go stale, and each page says when it was checked; the products we track, not every product sold, and Amazon and Walmart are not among the stores; listings and labels read at the source, each linked from the page. Found an error? Tell us. The full method: How we compare.