Which GHK-Cu fill has the lowest price per mg at Webb Peptides?

GHK-Cu 100 mg, at $0.054 per mg ($54.00 for 1,000 mg (1 g)).

How much does the largest GHK-Cu box hold?

GHK-Cu 100 mg: 10 × 100 mg vials make 1,000 mg (1 g), for $54.00.

Does a bigger GHK-Cu 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

GHK-Cu price per mg

Webb Peptides lists GHK-Cu in 2 vial fills, from 50 mg to 100 mg, each sold by the box of 10 vials. Per mg, the GHK-Cu 100 mg box is the lowest at $0.054 per mg. Every figure below comes from the live listings.

GHK-Cu fills compared
Listing	Fill	Box contents	Box price	Per vial	Per mg	Against the lowest
GHK-Cu 50 mg	50 mg	500 mg	$32.00	$3.20	$0.064	+19%
GHK-Cu 100 mg	100 mg	1,000 mg (1 g)	$54.00	$5.40	$0.054	lowest

Step by step up the ladder

50 mg → 100 mg: 2 times the contents for $22.00 more a box; per mg the price falls by 16%.

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
GHK-Cu 50 mg	$0.24	$0.11
GHK-Cu 100 mg	$0.14	$0.076

The arithmetic is in the note on landed cost.

Answers from these figures

Which GHK-Cu fill has the lowest price per mg at Webb Peptides?: GHK-Cu 100 mg, at $0.054 per mg ($54.00 for 1,000 mg (1 g)).
How much does the largest GHK-Cu box hold?: GHK-Cu 100 mg: 10 × 100 mg vials make 1,000 mg (1 g), for $54.00.
Does a bigger GHK-Cu 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.