Formula Twins

3,577 exact "Formula Twin" clusters found in the 2026-01-16 DSLD dump — identical formulas sold under multiple brand names. The largest: Fish Oil +Co Q-10 (218 products across 96 brands).

3,577 exact-match clusters (identical compound/form/amount + serving size) and 3,827 looser near-twin clusters (identical compound/form set, amounts ignored).

Largest exact-formula clusters

Example product	Size	Brands
Fish Oil +Co Q-10	218	96
Vitamin C 1,000 mg	175	76
High Potency Vitamin C 500 mg	167	75
Creatine 5 grams	126	82
Vitamin D3 5000 IU	117	80
CoQ10 200 mg	103	55
Vitamin D-3 1,000 IU	93	50
Melatonin 3 mg Sublingual Tablets	77	51
Vitamin D 2000 IU	75	52
Niacinamide 500 mg	71	38
CoQ10 100 mg	70	41
Ester-E 400 IU	65	36
Ultra-C Forte	62	35
Omega3 + D	62	28
C-1000 Caps With 100 mg Bioflavonoids	62	36
Biotin 5000 mcg	60	38
Triple Strength Glucosamine 1500 mg Chondroitin 1200 mg	59	30
Vitamin D3 5,000 IU	58	48
L-Theanine 200 mg	55	38
Age Management Ubiquinol	54	32
Melatonin 5 mg	53	37
Vitamin E 400 IU USP	53	22
Vitamin B-6 100 mg	52	43
Super Omega 3 EPA/DHA Formula	52	43
N-Acetyl Cysteine 600 mg	51	31
Vitamin D3 1,000 IU	51	38
Glucosamine Sulfate Sodium Free 500 mg	51	21
Non-Flush Niacin 500 mg	51	35
B12 1000 mg	47	30
Maximum Strength Co Q10 200 mg	46	36
Vitamin D3 2000 IU	45	34
Mini Thin 25-50	44	26
Sleep Tight Melatonin 3 mg	43	30
Melatonin 10 mg Delicious Strawberry Flavor	43	28
B-12 500 mcg	42	33
Chromium Picolinate 200 mcg	42	32
Triple Strength L-Carnitine 1,500 mg Natural Lemon Flavor	41	13
Apple Cider Vinegar Gummies Apple Flavor	41	6
Lutein	40	21
No-Flush Niacin	39	28
CoQ10 30 mg	39	25
High Potency Vitamin C 1000 mg	38	11
L-Arginine Caps 500 mg	38	12
Vitamin C 250 mg Orange Flavored Gummies	38	33
Molecularly Distilled Super Omega EPA	38	23
Iron 65 mg	37	25
Vitamin D3 1000 IU	37	29
Vitamin D3 10,000 IU	36	31
Vitamin C-500 mg Plus Echinacea	34	8
D-5000 5000 IU	33	23
Biotin 1000 mcg	32	26
Glucosamine-Chondroitin 1500 mg/1200 mg 900	32	16
Flex-A-Min Double Strength	32	25
Super Selenium 200 mcg	31	22
All Natural Omega-3 Fish Oil 1200 mg	31	19
Quick Dissolve Biotin 10,000 mcg Strawberry Flavor	31	18
Beta-Carotene Provitamin A 25,000 IU	30	22
Vitamin C	30	18
Turmeric Curcumin 500 mg	29	19
Vitamin D3	29	19
600+D	29	18
Vitamin D3 400 IU	28	18
Oyster Shell Calcium + D	28	10
Vitamin D 400 IU Supplement	28	18
Melatonin All Natural Strawberry Flavor	28	25
Melatonin 1 mg Sublingual	28	19
CoQ10	28	19
Biotin	28	21
Vitamin D Yummy Berry Flavor	27	20
Lutein 20 mg	27	18
Turmeric Curcumin	26	19
Natural Cold Pressed Flaxseed Oil 1000 mg	26	22
High Potency Calcium 600+D	26	13
Methylcobalamin	26	17
Pyridoxine HCl B6 50 mg	25	20
NAC	25	20
600 Calcium Supplement	25	15
Elderberry Gummies Berry Blast	25	24
Berberine and MicroPQQ Advanced	25	16
Vitamin D3 Adult Gummies	25	23
Vitamin E 400 IU	24	16
Omega-3 Krill Oil	24	13
Zinc 50 mg	24	21
Vitamin A 3000 mcg (10000 IU)	24	15
Super Fruit Gummies	24	2
Echinacea Plus Vitamin C	23	19
Natural Berry Flavor Methyl B-12 1,000 mcg	23	16
Biotin 5	23	16
Collagen Unflavored	23	12
Calcium Citrate Soft Chews Island Fruit	23	2
High Gamma Tocopherol 200 mg With Vitamin E	22	16
Niacinamide	22	19
Coenzyme Q10 60 mg	22	13
C-Max Vitamin C 1500 mg	22	8
Ultra Mega Biotin 10,000 mcg	22	17
Turmeric Extract 1000 mg	22	13
Beta-Carotene 7,500 mcg	22	15
Super Strength Melatonin 10 mg	21	14
Relora Serene	21	19
Chromium	21	16

Methodology

A "formula" is the sorted set of (compound, form, rounded elemental amount) tuples on a label plus its serving size. Products sharing an identical formula across at least two distinct brands form an exact-twin cluster — evidence of private-label / white-label manufacturing rather than a distinct formulation. The near-twin pass relaxes the match to compound+form only, ignoring declared amounts.