Product Details Product Name: GHK-cu Lyophilized 50mg Form: Lyophilized powder Purity: 99% (HPLC verified) Packaging: Sterile sealed vial Storage: Store in a cool, dry place Intended Use: For laboratory research use only Notice: This material is supplied strictly for research purposes only
The drugs reduce acid production in the stomach, but acid is needed to release B-12 from foods, so deficiency can occur
MDPI Full Text Scientific Reports (Nature)
Could someone answer either of these questions for me.both the sudden drop in efficacy ,if there is one,and the later observation

Everest Peptides BPC-157 (Vial Best Overall): 10mg vial: on sale $39.99 (regularly $49.99) With code BRAINFLOW (another 10% off): ~$36 for a full 10mg vial Less than several vendors on this list charge for just 5mg, half the peptide At 250mcg daily from 10mg: 40 days of use = about $0.90/day Free shipping on orders over $150 Free 2-Day Air on orders over $250 Payment: Apple Pay, all major credit and debit cards accepted No login required to view pricing Code BRAINFLOW saves another 10% on the sale price Amino Club BPC-157 (Vial Best Runner Up): 10mg vial: $39.99 With code BRAINFLOW (30% off through August 1): ~$28 for 10mg At 250mcg daily from 10mg: 40 days of use = about $0.70/day Additional costs: Bacteriostatic water ($10-15), syringes ($10-20 for 100-pack) Free shipment protection on every order Code BRAINFLOW saves 30% (when checkout is available) Infiniwell BPC Rapid Pro (Oral): 60 capsules (500mcg each): ~$160 At 2 capsules daily (1000mcg): 30 days of use Cost per day: ~$5.33 No additional supplies needed Use code WELCOME15 for 15% off (first-time customers) Paramount Peptides BPC-157 (Vial Best American-Made): 5mg and 10mg vials available (create free account to see pricing, listed as Pentadecapeptide) At 250mcg daily from 10mg: 40 days of use Additional costs: Bacteriostatic water ($10-15), syringes ($10-20 for 100-pack) Use code BRAINFLOW for 10% off Limitless Life BPC-157 (Vial Honorable Mention): 5mg vial: $61.99 | 10mg vial: $99.99 At 250mcg daily from 10mg: 40 days of use = ~$2.50/day Additional costs: Bacteriostatic water ($10-15), syringes ($10-20 for 100-pack) Bulk discounts: 5% off at 5-9 vials, 10% off at 10-14, 15% off at 15+ Value analysis: Everest is on sale right now, and with the BRAINFLOW discount on top it lands at about $36 for a full 10mg vial, roughly $0.90/day on a Freedom Diagnostics-verified product, with Apple Pay checkout, no login gate, and free 2-Day Air over $250

That's a lot of watermelon