Table 1.

Summary of available tocotrienol formulations including source, delivery systems, excipients and composition of tocorienol homologues

Tocotrienol formulations	Source	Dosage form	Delivery system	Excipients and vehicles	Composition of tocotrienol homologues (% w/w) *	Reference
Palm Vitee	Palm	Capsule	Oil suspension	Palm olein	α: 12-15%, γ: 35-40%, δ: 25-30%	[37,38,42,45-47]
Tocovid Suprabio®	Palm	Capsule	Self-emulsifying drug delivery system	Tween 80, Labrasol, Palm olein/Soybean oil	α: 23.5%, γ: 43.2%, δ: 9.8%	[22,26,28,40,44,48]
Tocomin® 50%	Palm	Emulsion	Self-emulsifying drug delivery system	Tween 80, Labrasol, Soybean Oil	α: 10.7%, γ: 21.6%, δ: 6.4%	[32]
Tri® E	Palm	Capsule	Oil suspension	Palm superolein	74% of mixed homologues**	[49-51]
Tocotrienol-rich fractions (TRF)	Palm	Capsule	Oil suspension	Vegetable oils	α: 34.6%, γ: 24.6%, δ: 15.0%,	[39]
					α: 29.3%, β: 3.0%, γ: 28.1%, δ: 8.2%	[21]
					α: 29..8%, β: 2.9%, γ: 27.0%, δ: 8.6%	[23]
					66.7% of mixed homologues**	[43]
	Rice Bran	Capsule	Oil suspension	Vegetable oils	α: 14.6%, β: 2.2%, γ: 38.8%, δ: 29.9%	[36]
					TRF25 containing α: 15.5%, β: 1.6%, γ: 39.4%, δ: 5.2%, desmethyl and didesmethyl: 20.9%	[41,52,53]
					Various compositionally different tocotrienols supplements	[54]
Individual tocotrienol homologues	Palm	Capsule	Oil suspension	Olive oil	30 mg of γδ-tocotrienols**	[55]
				Medium-chain triglyceride	α, γ and δ-tocotrienyl acetate	[56]

*% w/w of tocotrienol homologues calculated based on g / 100 g of total vitamin E content.

**Composition of individual tocotrienol homologue not specified.