🦷 Bleeding gums: from scurvy to subclinical vitamin C and bioflavonoid deficiency
Why gums bleed and what to do about it
Bleeding gums when brushing is a very common symptom. In most cases it is a sign of gingivitis (gum inflammation) from dental plaque. But sometimes the cause is deeper — a deficiency of nutrients that support vascular and connective tissue health. Let's look at when to consider deficiencies and how to adjust your diet.
Main causes of bleeding
- Gingivitis — inflammation from plaque and tartar (most common cause).
- Too aggressive brushing or a hard brush.
- Vitamin C deficiency — reduced strength of vessels and collagen.
- Vitamin K deficiency — impaired clotting (rare but possible).
- Lack of bioflavonoids — capillary weakness.
Before blaming deficiencies, it is worth ruling out gingivitis — that is the dentist's job. For more on vitamin C and vascular health — see "Vitamin C: which form is better".
Historical note: scurvy
Classic scurvy was a disease of sailors and travelers deprived of fresh vegetables and fruits. Bleeding gums was one of its main symptoms.
James Lind
The British physician ran an experiment aboard a ship: sailors given citrus recovered from scurvy. This proved the link with nutrition.
Discovery of vitamin C
Albert Szent-Györgyi isolated vitamin C (ascorbic acid) and later received a Nobel Prize for it.
Full scurvy is rare today, but subclinical vitamin C deficiency (level below normal, but not critical) is common and may show as bleeding gums, fatigue and slow healing. More — in "Slow wound healing and bruises".
The role of vitamin C
Vitamin C is needed to synthesize collagen — the protein that forms the basis of gums and vessel walls. When deficient, collagen forms worse, vessels become fragile, and gums start to bleed.
| Parameter | Value |
|---|---|
| Daily norm of vitamin C | 90 mg (men), 75 mg (women) |
| For smokers | +35 mg a day |
| Signs of deficiency | Bleeding gums, fatigue, fragile vessels |
Bioflavonoids and vitamin K
Bioflavonoids (rutin, hesperidin, quercetin) strengthen capillary walls and reduce their permeability. They often work with vitamin C. Rutin is found in citrus (the white pith), buckwheat and berries.
Vitamin K participates in blood clotting. Its marked deficiency can show as bleeding. Sources — green leafy vegetables (spinach, kale, broccoli). For more on vitamin K2 — see "Vitamin K2 deficiency".
Diagnosis and nutrition
Dentist
Professional cleaning and treatment of gingivitis is the main step for bleeding.
Nutrition
Vegetables, fruits, greens, berries — sources of vitamin C, flavonoids and vitamin K.
Gentle brushing
A soft brush and proper technique reduce gum trauma.
Tests
Vitamin C, vitamin K and clotting levels with persistent symptoms.
Balanced nutrition with enough vitamin C and flavonoids is usually enough to support gum health, if there is no inflammation. On vitamin C for connective tissue — see the article on vitamin C forms.
Why do gums bleed?
Most often from gingivitis (inflammation from plaque), and also with vitamin C, flavonoid or vitamin K deficiency.
Does vitamin C help bleeding gums?
With deficiency — yes: vitamin C is needed for collagen synthesis and vessel strength in the gums.
What is scurvy?
A disease from severe vitamin C deficiency, showing as bleeding gums, weakness and fragile vessels.
Which foods strengthen gums?
Citrus, kiwi, bell pepper, broccoli (vitamin C), greens and leafy vegetables (vitamin K), berries and buckwheat (rutin).
What are bioflavonoids?
Plant compounds (rutin, hesperidin, quercetin) that strengthen capillary walls.
Does vitamin K affect bleeding?
Yes, vitamin K is involved in blood clotting; marked deficiency can cause bleeding.
Who to see for bleeding gums?
First a dentist to rule out gingivitis; with other bleeding — a doctor for tests.
Can brushing cause bleeding?
Yes, aggressive brushing or a hard brush can injure gums. Gentle technique matters.
How much vitamin C per day?
Usually 75–90 mg a day, smokers need 35 mg more.
When is bleeding gums dangerous?
When combined with nosebleeds, unexplained bruises and prolonged bleeding — see a doctor urgently.