NTP Dietary Supplementation & Herbal Support 2 — Questions and Answers
Question 1: Which form of magnesium is most bioavailable and least likely to cause loose stools at therapeutic doses?
- Magnesium oxide
- Magnesium glycinate (Correct answer)
- Magnesium sulfate
- Magnesium chloride
Correct answer: Magnesium glycinate
Magnesium glycinate is chelated to glycine, improving absorption and minimizing the osmotic laxative effect seen with less bioavailable forms.
Question 2: A client taking a blood thinner asks about herbal support. Which herb poses the greatest risk of potentiating anticoagulant therapy?
- Chamomile
- Ginkgo biloba (Correct answer)
- Peppermint
- Ginger root
Correct answer: Ginkgo biloba
Ginkgo biloba has significant platelet-inhibiting activity and can potentiate anticoagulants like warfarin, increasing bleeding risk.
Question 3: Berberine exerts its primary blood-sugar-regulating effect through which mechanism?
- Stimulating pancreatic beta cells to release more insulin
- Activating AMPK to improve insulin sensitivity (Correct answer)
- Blocking intestinal glucose transporters exclusively
- Suppressing glucagon secretion from alpha cells
Correct answer: Activating AMPK to improve insulin sensitivity
Berberine activates AMP-activated protein kinase (AMPK), a cellular energy sensor that improves insulin sensitivity and reduces hepatic glucose output.
Question 4: Which fat-soluble vitamin can accumulate to toxic levels when supplemented in excess without cofactor balance?
- Vitamin K2 (MK-7)
- Vitamin D3
- Vitamin E (tocopherol)
- Vitamin A (retinol) (Correct answer)
Correct answer: Vitamin A (retinol)
Preformed vitamin A (retinol) is stored in the liver and is the fat-soluble vitamin most associated with toxicity at supplemental doses exceeding 10,000 IU/day chronically.
Question 5: An NTP recommends adaptogenic herbs to modulate the HPA axis. Which herb is classified as a primary adaptogen AND has the most clinical evidence for reducing cortisol?
- Rhodiola rosea
- Holy basil (Tulsi)
- Ashwagandha (KSM-66) (Correct answer)
- Eleuthero
Correct answer: Ashwagandha (KSM-66)
Ashwagandha, especially the KSM-66 extract, has the strongest clinical trial evidence for significantly reducing serum cortisol and perceived stress scores.
Question 6: When recommending a probiotic supplement, which strain has the most evidence for reducing antibiotic-associated diarrhea?
- Lactobacillus acidophilus NCFM
- Bifidobacterium longum BB536
- Saccharomyces boulardii CNCM I-745 (Correct answer)
- Lactobacillus plantarum 299v
Correct answer: Saccharomyces boulardii CNCM I-745
Saccharomyces boulardii is a yeast-based probiotic with robust meta-analytic evidence for preventing antibiotic-associated diarrhea and C. difficile recurrence.
Question 7: Which nutrient is required for the conversion of homocysteine to methionine via the remethylation pathway?
- Vitamin B6 and zinc
- Folate and vitamin B12 (Correct answer)
- Riboflavin and magnesium
- Vitamin C and copper
Correct answer: Folate and vitamin B12
The remethylation of homocysteine to methionine requires 5-methyltetrahydrofolate (active folate) as the methyl donor and vitamin B12 as a cofactor for the enzyme methionine synthase.
NTP Dietary Supplementation & Herbal Support 2
Which form of magnesium is most bioavailable and least likely to cause loose stools at therapeutic doses?