The amino acid page states a 25 kg drum pack. That is the unit to plan around for a first bulk order. BCAA is listed as Instant, Powder and Granules; citrulline is listed both as L-Citrulline and as L-Citrulline DL-Malate 1:1 / 2:1; carnitine appears as a series plus N-acetyl-L-carnitine.
Related sports ingredients on the same table - creatine series, taurine, GABA, chondroitin sulfate, glucosamine sulfate, MSM, GAKIC - are not amino acids in the strict sense, but they sit on that page on the live site, so they are sourced from the same conversation.
If the next step is a tablet or capsule rather than a bulk drum, move to the nutritional-supplements or private-label page and quote the finished-form MOQ instead of the 25 kg drum.
More notes
Sourcing plant extracts for a first production run
How the published extract list and 1 kg MOQ change the way a brand writes an RFQ.
Choosing a private-label dose form
Softgel, gummy, capsule, tablet, or drops — using only the forms and MOQ figures published by HHC.
When a formula needs a specialty active
NMN, PQQ, SAMe, Alpha-GPC and the rest of the published specialty list, and why they sit on their own page.