Supplements for blood-sugar control

22 compounds relevant to blood-sugar control, ranked by overall evidence grade.

Overall grade: Grade A
Last revised: Jul 10, 2026; 22
graded outcomes: 0
references listed

Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.

1 at grade A · 4 at grade B · 15 at grade C · 2 at grade D — 22 graded rows

What is known

Each outcome with its grade (how strong the evidence is, A to D), the size of the effect where the entry records one, and how often studies agree.

Outcome	Grade	Effect size	Agreement
Psyllium HuskThe most boring A-grade on the shelf: a soluble fiber that improves regularity, LDL, and glucose — and binds your medications.	Evidence grade A	Unclear	mixed
BerberineA plant alkaloid that behaves like a metabolic drug — real glucose and lipid effects, and it deserves drug-level caution.	Evidence grade B	Unclear	mixed
Alpha-Lipoic AcidAn antioxidant with genuine evidence for diabetic neuropathy symptoms and modest insulin-sensitivity effects.	Evidence grade B	Unclear	mixed
Inositol (Myo-Inositol)A sugar-alcohol with genuinely good evidence in PCOS and reasonable anxiety/OCD signals.	Evidence grade B	Unclear	mixed
Resistant StarchStarch that escapes digestion to feed the colon — a potent butyrate producer with real post-meal glucose benefits.	Evidence grade B	Unclear	mixed
Holy Basil (Tulsi)A gentle adaptogen with early evidence for stress, anxiety, and metabolic markers — promising, thin, low-risk.	Evidence grade C	Unclear	mixed
FenugreekA libido herb with reasonable sexual-function data and inconsistent testosterone claims — the effect people feel is desire, not androgens.	Evidence grade C	Unclear	mixed
CinnamonA modest, inconsistent glucose helper — and a reminder that cassia cinnamon's coumarin can stress the liver at high doses.	Evidence grade C	Unclear	mixed
CarnosineA muscle/brain dipeptide better raised by beta-alanine — direct supplementation adds anti-glycation angles.	Evidence grade C	Unclear	mixed
Gymnema SylvestreThe 'sugar destroyer' herb with modest glucose data and a genuine ability to blunt sweet taste.	Evidence grade C	Unclear	mixed
Banaba (Corosolic Acid)A glucose-lowering leaf whose corosolic acid shows small post-meal effects in limited trials.	Evidence grade C	Unclear	mixed
Bitter MelonA traditional anti-diabetic gourd with inconsistent trials and a real hypoglycemia caution.	Evidence grade C	Unclear	mixed
Aloe VeraTopical aloe helps minor burns; oral aloe has modest glucose and IBS signals but a laxative/safety caveat.	Evidence grade C	Unclear	mixed
American GinsengDistinct from Asian ginseng — its best data are for glucose control and reducing cold frequency.	Evidence grade C	Unclear	mixed
Apple Cider VinegarThe acetic acid modestly blunts post-meal glucose — small, real, and easy to overhype.	Evidence grade C	Unclear	mixed
MoringaA nutrient-dense 'superfood' leaf with early glucose and lipid signals — more food than medicine.	Evidence grade C	Unclear	mixed
White Kidney Bean ExtractA starch-blocker that modestly blunts carb absorption — small real effect, big marketing.	Evidence grade C	Unclear	mixed
Mulberry LeafA natural alpha-glucosidase inhibitor that genuinely flattens the post-meal glucose spike.	Evidence grade C	Unclear	mixed
Black Seed Oil (Nigella sativa)A traditional 'cure-all' seed oil (thymoquinone) with real, modest signals for blood pressure, glucose and lipids.	Evidence grade C	Unclear	mixed
MaitakeA culinary-medicinal mushroom with beta-glucan immune activity and early glucose signals.	Evidence grade C	Unclear	mixed
ChromiumA perennial weight-loss and blood-sugar supplement whose effects, on honest review, round to noise.	Evidence grade D	Unclear	mixed
VanadiumAn insulin-mimetic trace element that lowers glucose only at near-toxic doses — not a usable supplement.	Evidence grade D	Unclear	mixed

Psyllium HuskEvidence grade A
The most boring A-grade on the shelf: a soluble fiber that improves regularity, LDL, and glucose — and binds your medications.
Unclearmixed
BerberineEvidence grade B
A plant alkaloid that behaves like a metabolic drug — real glucose and lipid effects, and it deserves drug-level caution.
Unclearmixed
Alpha-Lipoic AcidEvidence grade B
An antioxidant with genuine evidence for diabetic neuropathy symptoms and modest insulin-sensitivity effects.
Unclearmixed
Inositol (Myo-Inositol)Evidence grade B
A sugar-alcohol with genuinely good evidence in PCOS and reasonable anxiety/OCD signals.
Unclearmixed
Resistant StarchEvidence grade B
Starch that escapes digestion to feed the colon — a potent butyrate producer with real post-meal glucose benefits.
Unclearmixed
Holy Basil (Tulsi)Evidence grade C
A gentle adaptogen with early evidence for stress, anxiety, and metabolic markers — promising, thin, low-risk.
Unclearmixed
FenugreekEvidence grade C
A libido herb with reasonable sexual-function data and inconsistent testosterone claims — the effect people feel is desire, not androgens.
Unclearmixed
CinnamonEvidence grade C
A modest, inconsistent glucose helper — and a reminder that cassia cinnamon's coumarin can stress the liver at high doses.
Unclearmixed
CarnosineEvidence grade C
A muscle/brain dipeptide better raised by beta-alanine — direct supplementation adds anti-glycation angles.
Unclearmixed
Gymnema SylvestreEvidence grade C
The 'sugar destroyer' herb with modest glucose data and a genuine ability to blunt sweet taste.
Unclearmixed
Banaba (Corosolic Acid)Evidence grade C
A glucose-lowering leaf whose corosolic acid shows small post-meal effects in limited trials.
Unclearmixed
Bitter MelonEvidence grade C
A traditional anti-diabetic gourd with inconsistent trials and a real hypoglycemia caution.
Unclearmixed
Aloe VeraEvidence grade C
Topical aloe helps minor burns; oral aloe has modest glucose and IBS signals but a laxative/safety caveat.
Unclearmixed
American GinsengEvidence grade C
Distinct from Asian ginseng — its best data are for glucose control and reducing cold frequency.
Unclearmixed
Apple Cider VinegarEvidence grade C
The acetic acid modestly blunts post-meal glucose — small, real, and easy to overhype.
Unclearmixed
MoringaEvidence grade C
A nutrient-dense 'superfood' leaf with early glucose and lipid signals — more food than medicine.
Unclearmixed
White Kidney Bean ExtractEvidence grade C
A starch-blocker that modestly blunts carb absorption — small real effect, big marketing.
Unclearmixed
Mulberry LeafEvidence grade C
A natural alpha-glucosidase inhibitor that genuinely flattens the post-meal glucose spike.
Unclearmixed
Black Seed Oil (Nigella sativa)Evidence grade C
A traditional 'cure-all' seed oil (thymoquinone) with real, modest signals for blood pressure, glucose and lipids.
Unclearmixed
MaitakeEvidence grade C
A culinary-medicinal mushroom with beta-glucan immune activity and early glucose signals.
Unclearmixed
ChromiumEvidence grade D
A perennial weight-loss and blood-sugar supplement whose effects, on honest review, round to noise.
Unclearmixed
VanadiumEvidence grade D
An insulin-mimetic trace element that lowers glucose only at near-toxic doses — not a usable supplement.
Unclearmixed

What is uncertain

Read off the same rows as above. Nothing here is added that the entry does not itself record.

Thin evidence: Holy Basil (Tulsi) (grade C); Fenugreek (grade C); Cinnamon (grade C); Carnosine (grade C); Gymnema Sylvestre (grade C); Banaba (Corosolic Acid) (grade C); Bitter Melon (grade C); Aloe Vera (grade C); American Ginseng (grade C); Apple Cider Vinegar (grade C); Moringa (grade C); White Kidney Bean Extract (grade C); Mulberry Leaf (grade C); Black Seed Oil (Nigella sativa) (grade C); Maitake (grade C); Chromium (grade D); Vanadium (grade D).
Studies disagree: Psyllium Husk (mixed agreement); Berberine (mixed agreement); Alpha-Lipoic Acid (mixed agreement); Inositol (Myo-Inositol) (mixed agreement); Resistant Starch (mixed agreement).

The evidence in words

The shortlist

Every compound in the knowledge base tagged to blood-sugar control, ordered by how strong its overall evidence is. Start at the top; the grade is the honest filter.

Worth considering first

Psyllium Husk (A) — The most boring A-grade on the shelf: a soluble fiber that improves regularity, LDL, and glucose — and binds your medications. · Berberine (B) — A plant alkaloid that behaves like a metabolic drug — real glucose and lipid effects, and it deserves drug-level caution. · Alpha-Lipoic Acid (B) — An antioxidant with genuine evidence for diabetic neuropathy symptoms and modest insulin-sensitivity effects. · Inositol (Myo-Inositol) (B) — A sugar-alcohol with genuinely good evidence in PCOS and reasonable anxiety/OCD signals. · Resistant Starch (B) — Starch that escapes digestion to feed the colon — a potent butyrate producer with real post-meal glucose benefits.

Lower-evidence options

Holy Basil (Tulsi) (C) — A gentle adaptogen with early evidence for stress, anxiety, and metabolic markers — promising, thin, low-risk. · Fenugreek (C) — A libido herb with reasonable sexual-function data and inconsistent testosterone claims — the effect people feel is desire, not androgens. · Cinnamon (C) — A modest, inconsistent glucose helper — and a reminder that cassia cinnamon's coumarin can stress the liver at high doses. · Carnosine (C) — A muscle/brain dipeptide better raised by beta-alanine — direct supplementation adds anti-glycation angles. · Gymnema Sylvestre (C) — The 'sugar destroyer' herb with modest glucose data and a genuine ability to blunt sweet taste. · Banaba (Corosolic Acid) (C) — A glucose-lowering leaf whose corosolic acid shows small post-meal effects in limited trials. · Bitter Melon (C) — A traditional anti-diabetic gourd with inconsistent trials and a real hypoglycemia caution. · Aloe Vera (C) — Topical aloe helps minor burns; oral aloe has modest glucose and IBS signals but a laxative/safety caveat. · American Ginseng (C) — Distinct from Asian ginseng — its best data are for glucose control and reducing cold frequency. · Apple Cider Vinegar (C) — The acetic acid modestly blunts post-meal glucose — small, real, and easy to overhype. · Moringa (C) — A nutrient-dense 'superfood' leaf with early glucose and lipid signals — more food than medicine. · White Kidney Bean Extract (C) — A starch-blocker that modestly blunts carb absorption — small real effect, big marketing. · Mulberry Leaf (C) — A natural alpha-glucosidase inhibitor that genuinely flattens the post-meal glucose spike. · Black Seed Oil (Nigella sativa) (C) — A traditional 'cure-all' seed oil (thymoquinone) with real, modest signals for blood pressure, glucose and lipids. · Maitake (C) — A culinary-medicinal mushroom with beta-glucan immune activity and early glucose signals. · Chromium (D) — A perennial weight-loss and blood-sugar supplement whose effects, on honest review, round to noise. · Vanadium (D) — An insulin-mimetic trace element that lowers glucose only at near-toxic doses — not a usable supplement.

Goes with

Psyllium HuskGrade AEvidence grade A
BerberineGrade BEvidence grade B
Alpha-Lipoic AcidGrade BEvidence grade B
Inositol (Myo-Inositol)Grade BEvidence grade B
Resistant StarchGrade BEvidence grade B
Holy Basil (Tulsi)Grade CEvidence grade C
FenugreekGrade CEvidence grade C
CinnamonGrade CEvidence grade C

Entries that share this one's tags or conditions.

Aloe VeraTopical aloe helps minor burns; oral aloe has modest glucose and IBS signals but a laxative/safety caveat.Evidence grade C
Aloe Vera for Glycemic control (oral)Evidence grade C — Inner-leaf gelEvidence grade C
Aloe Vera for Minor burn/wound healing (topical)Evidence grade C — ModestEvidence grade C
Aloe Vera: dosage and how to take itGel for minor burns.Evidence grade C

Sources

This entry lists no references of its own — it is assembled from the entries it links to, whose sources are on their pages.

Last revised Jul 10, 2026. A grade is this entry's reading of the evidence, not medical advice.