Rarest Hormone — All 34 Answers Ranked by Rarity

34 answers are accepted for “Name a hormone”. Luteal Hormone is the rarest hormone in this ranking, with 13 monthly Wikipedia views (rarity 1.000, Legendary). Cannabinoid receptor modulator is the second-rarest with 77 monthly Wikipedia views, 5.92× the figure for Luteal Hormone. Melatonin is the most common hormone in this ranking, with 221,398 monthly Wikipedia views, 17,031× the figure for the rarest. Combined monthly Wikipedia views across the 34 answers: 1,363,203. Luteal Hormone is under 0.1% of that total. 7 answers are Epic or Legendary: Luteal Hormone (Legendary), Cannabinoid receptor modulator (Legendary), Dynepo (Legendary), and 4 more.

Quick answer

Monthly English Wikipedia pageviews. Source: Wikidata + Wikipedia pageviews (2026-10).

Ranked answers

34 answers to “Name a hormone”, rarest first. A rarity of 1 is the rarest answer in this prompt.
Rank	Answer	Tier	Rarity	Monthly Wikipedia views
1	Luteal Hormone on Wikipedia	Legendary	1.000	13
2	Cannabinoid receptor modulator on Wikipedia	Legendary	0.970	77
3	Dynepo on Wikipedia	Legendary	0.939	144
4	EFSH on Wikipedia	Epic	0.909	261
5	Hepatalin on Wikipedia	Epic	0.879	266
6	Lipokine on Wikipedia	Epic	0.848	545
7	Preprohormone on Wikipedia	Epic	0.818	739
8	N-Acylphosphatidylethanolamine on Wikipedia	Rare	0.788	961
9	Raptin on Wikipedia	Rare	0.758	1,147
10	Enterogastrone on Wikipedia	Rare	0.727	1,244
11	Trophic hormone on Wikipedia	Rare	0.697	2,426
12	Adrenocortical hormone on Wikipedia	Rare	0.667	2,737
13	Hypothalamic–pituitary hormone on Wikipedia	Rare	0.636	3,175
14	Autacoid on Wikipedia	Rare	0.606	3,842
15	Tropic hormone on Wikipedia	Uncommon	0.576	4,856
16	Gastrointestinal hormone on Wikipedia	Uncommon	0.545	5,248
17	Neurohormone on Wikipedia	Uncommon	0.515	7,745
18	Stress hormone on Wikipedia	Uncommon	0.485	15,166
19	Mineralocorticoid on Wikipedia	Uncommon	0.455	18,002
20	Corticotropin-releasing hormone on Wikipedia	Uncommon	0.424	20,638
21	Bovine somatotropin on Wikipedia	Familiar	0.394	25,169
22	Peptide hormone on Wikipedia	Familiar	0.364	36,200
23	Incretin on Wikipedia	Familiar	0.333	36,497
24	Thyroid hormones on Wikipedia	Familiar	0.303	38,315
25	Parathyroid hormone on Wikipedia	Familiar	0.273	40,549
26	Thyroid-stimulating hormone on Wikipedia	Familiar	0.242	46,909
27	Steroid hormone on Wikipedia	Familiar	0.212	48,702
28	Luteinizing hormone on Wikipedia	Common	0.182	73,945
29	Glucocorticoid on Wikipedia	Common	0.152	86,998
30	Prolactin on Wikipedia	Common	0.121	97,821
31	Androgen on Wikipedia	Common	0.091	121,062
32	Estrogen on Wikipedia	Common	0.061	189,245
33	Growth hormone on Wikipedia	Common	0.030	211,161
34	Melatonin on Wikipedia	Common	0.000	221,398

FAQ

What is the rarest hormone?

Luteal Hormone is the rarest hormone in this ranking, with 13 monthly Wikipedia views (rarity 1.000, Legendary).

How many hormones are there?

There are 34 hormones in this ranking, from Luteal Hormone (rarest) to Melatonin (most common).

What is the most common hormone?

Melatonin is the most common hormone in this ranking, with 221,398 monthly Wikipedia views (Common).

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Sources

Recorded source: Wikidata + Wikipedia pageviews (2026-10). The answer list is compiled from Wikidata (CC0), and the view counts are monthly English Wikipedia pageviews. Rarity is the percentile of the popularity figure inside this prompt: 1 is the rarest and 0 is the most common. Linked names open the English Wikipedia article stored on that answer.