Which DSIP fill has the lowest price per mg at Webb Peptides?

DSIP 10 mg, at $1.08 per mg ($108.00 for 100 mg).

How much does the largest DSIP box hold?

DSIP 10 mg: 10 × 10 mg vials make 100 mg, for $108.00.

Does a bigger DSIP fill always cost less per mg?

At Webb Peptides, yes for every step of this ladder: each larger fill works out lower per mg than the one below it.

Price per mg

DSIP price per mg

Webb Peptides lists DSIP in 2 vial fills, from 5 mg to 10 mg, each sold by the box of 10 vials. Per mg, the DSIP 10 mg box is the lowest at $1.08 per mg. Every figure below comes from the live listings.

DSIP fills compared
Listing	Fill	Box contents	Box price	Per vial	Per mg	Against the lowest
DSIP 5 mg	5 mg	50 mg	$65.00	$6.50	$1.30	+20%
DSIP 10 mg	10 mg	100 mg	$108.00	$10.80	$1.08	lowest

Step by step up the ladder

5 mg → 10 mg: 2 times the contents for $43.00 more a box; per mg the price falls by 17%.

With shipping added

Shipping is $90.00 for up to 4 boxes in one order, so its share of each box depends on the order size. Per mg including that share:

Listing	1 box alone	4 boxes in the order
DSIP 5 mg	$3.10	$1.75
DSIP 10 mg	$1.98	$1.30

The arithmetic is in the note on landed cost.

Answers from these figures

Which DSIP fill has the lowest price per mg at Webb Peptides?: DSIP 10 mg, at $1.08 per mg ($108.00 for 100 mg).
How much does the largest DSIP box hold?: DSIP 10 mg: 10 × 10 mg vials make 100 mg, for $108.00.
Does a bigger DSIP fill always cost less per mg?: At Webb Peptides, yes for every step of this ladder: each larger fill works out lower per mg than the one below it.

Webb Peptides supplies materials for in-vitro laboratory research only, not for human or veterinary use and not for diagnostic or therapeutic use. Webb sells nothing intended to be consumed.